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Subject[PATCH] drivers: usb/power: fix return value check of usb_get_phy
Date
usb_get_phy will return -ENODEV if it's not able to find the phy. Hence
fixed all the callers of usb_get_phy to check for this error condition
instead of relying on a non-zero value as success condition.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
Developed on
git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git xceiv
Compile tested only for omap2plus_defconfig.
drivers/power/ab8500_charger.c | 2 +-
drivers/power/isp1704_charger.c | 2 +-
drivers/power/pda_power.c | 16 ++++++++--------
drivers/power/twl4030_charger.c | 7 ++++---
drivers/usb/chipidea/udc.c | 9 +++++----
drivers/usb/gadget/fsl_udc_core.c | 15 ++++++++-------
drivers/usb/gadget/mv_udc_core.c | 13 +++++++------
drivers/usb/gadget/omap_udc.c | 25 +++++++++++++------------
drivers/usb/gadget/pxa25x_udc.c | 11 ++++++-----
drivers/usb/gadget/pxa27x_udc.c | 11 ++++++-----
drivers/usb/gadget/s3c-hsudc.c | 9 +++++----
drivers/usb/host/ehci-fsl.c | 5 +++--
drivers/usb/host/ehci-msm.c | 2 +-
drivers/usb/host/ehci-mv.c | 7 ++++---
drivers/usb/host/ehci-tegra.c | 7 ++++---
drivers/usb/host/ohci-omap.c | 5 +++--
drivers/usb/musb/am35x.c | 3 ++-
drivers/usb/musb/blackfin.c | 3 ++-
drivers/usb/musb/da8xx.c | 3 ++-
drivers/usb/musb/davinci.c | 3 ++-
drivers/usb/musb/musb_dsps.c | 3 ++-
drivers/usb/musb/omap2430.c | 2 +-
drivers/usb/musb/tusb6010.c | 3 ++-
drivers/usb/musb/ux500.c | 3 ++-
drivers/usb/otg/otg.c | 4 ++--
25 files changed, 96 insertions(+), 77 deletions(-)

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 6bd6f1c..d4f0c98 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -2689,7 +2689,7 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
}

di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!di->usb_phy) {
+ if (IS_ERR_OR_NULL(di->usb_phy)) {
dev_err(di->dev, "failed to get usb transceiver\n");
ret = -EINVAL;
goto free_usb;
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index 090e5f9..1229119 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -416,7 +416,7 @@ static int __devinit isp1704_charger_probe(struct platform_device *pdev)
return -ENOMEM;

isp->phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!isp->phy)
+ if (IS_ERR_OR_NULL(isp->phy))
goto fail0;

isp->dev = &pdev->dev;
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 7602d49..8dbcd53 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -322,11 +322,11 @@ static int pda_power_probe(struct platform_device *pdev)

#ifdef CONFIG_USB_OTG_UTILS
transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
- if (transceiver && !pdata->is_usb_online) {
- pdata->is_usb_online = otg_is_usb_online;
- }
- if (transceiver && !pdata->is_ac_online) {
- pdata->is_ac_online = otg_is_ac_online;
+ if (!IS_ERR_OR_NULL(transceiver)) {
+ if (!pdata->is_usb_online)
+ pdata->is_usb_online = otg_is_usb_online;
+ if (!pdata->is_ac_online)
+ pdata->is_ac_online = otg_is_ac_online;
}
#endif

@@ -373,7 +373,7 @@ static int pda_power_probe(struct platform_device *pdev)
}

#ifdef CONFIG_USB_OTG_UTILS
- if (transceiver && pdata->use_otg_notifier) {
+ if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
otg_nb.notifier_call = otg_handle_notification;
ret = usb_register_notifier(transceiver, &otg_nb);
if (ret) {
@@ -408,7 +408,7 @@ usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, &pda_psy_ac);
#ifdef CONFIG_USB_OTG_UTILS
- if (transceiver)
+ if (!IS_ERR_OR_NULL(transceiver))
usb_put_phy(transceiver);
#endif
ac_irq_failed:
@@ -443,7 +443,7 @@ static int pda_power_remove(struct platform_device *pdev)
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
#ifdef CONFIG_USB_OTG_UTILS
- if (transceiver)
+ if (!IS_ERR_OR_NULL(transceiver))
usb_put_phy(transceiver);
#endif
if (ac_draw) {
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 13f9db2..7cacbaa 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/i2c/twl.h>
@@ -480,7 +481,7 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
INIT_WORK(&bci->work, twl4030_bci_usb_work);

bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
- if (bci->transceiver != NULL) {
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
usb_register_notifier(bci->transceiver, &bci->usb_nb);
}
@@ -507,7 +508,7 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
return 0;

fail_unmask_interrupts:
- if (bci->transceiver != NULL) {
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
usb_put_phy(bci->transceiver);
}
@@ -538,7 +539,7 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR2A);

- if (bci->transceiver != NULL) {
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
usb_put_phy(bci->transceiver);
}
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index a06d28b..4688ab7 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -14,6 +14,7 @@
#include <linux/device.h>
#include <linux/dmapool.h>
#include <linux/dma-mapping.h>
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/module.h>
@@ -1712,7 +1713,7 @@ static int udc_start(struct ci13xxx *udc)
if (retval)
goto unreg_device;

- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
retval = otg_set_peripheral(udc->transceiver->otg,
&udc->gadget);
if (retval)
@@ -1729,7 +1730,7 @@ static int udc_start(struct ci13xxx *udc)
return retval;

remove_trans:
- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
usb_put_phy(udc->transceiver);
}
@@ -1740,7 +1741,7 @@ remove_dbg:
unreg_device:
device_unregister(&udc->gadget.dev);
put_transceiver:
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
usb_put_phy(udc->transceiver);
free_pools:
dma_pool_destroy(udc->td_pool);
@@ -1772,7 +1773,7 @@ static void udc_stop(struct ci13xxx *udc)
dma_pool_destroy(udc->td_pool);
dma_pool_destroy(udc->qh_pool);

- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
otg_set_peripheral(udc->transceiver->otg, NULL);
usb_put_phy(udc->transceiver);
}
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index 0808820..8d8fca6 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/list.h>
@@ -1229,7 +1230,7 @@ static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
struct fsl_udc *udc;

udc = container_of(gadget, struct fsl_udc, gadget);
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return usb_phy_set_power(udc->transceiver, mA);
return -ENOTSUPP;
}
@@ -1983,13 +1984,13 @@ static int fsl_start(struct usb_gadget_driver *driver,
goto out;
}

- if (udc_controller->transceiver) {
+ if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
/* Suspend the controller until OTG enable it */
udc_controller->stopped = 1;
printk(KERN_INFO "Suspend udc for OTG auto detect\n");

/* connect to bus through transceiver */
- if (udc_controller->transceiver) {
+ if (!IS_ERR_OR_NULL(udc_controller->transceiver)) {
retval = otg_set_peripheral(
udc_controller->transceiver->otg,
&udc_controller->gadget);
@@ -2030,7 +2031,7 @@ static int fsl_stop(struct usb_gadget_driver *driver)
if (!driver || driver != udc_controller->driver || !driver->unbind)
return -EINVAL;

- if (udc_controller->transceiver)
+ if (!IS_ERR_OR_NULL(udc_controller->transceiver))
otg_set_peripheral(udc_controller->transceiver->otg, NULL);

/* stop DR, disable intr */
@@ -2456,7 +2457,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
#ifdef CONFIG_USB_OTG
if (pdata->operating_mode == FSL_USB2_DR_OTG) {
udc_controller->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!udc_controller->transceiver) {
+ if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
ERR("Can't find OTG driver!\n");
ret = -ENODEV;
goto err_kfree;
@@ -2540,7 +2541,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
goto err_free_irq;
}

- if (!udc_controller->transceiver) {
+ if (IS_ERR_OR_NULL(udc_controller->transceiver)) {
/* initialize usb hw reg except for regs for EP,
* leave usbintr reg untouched */
dr_controller_setup(udc_controller);
@@ -2564,7 +2565,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
if (ret < 0)
goto err_free_irq;

- if (udc_controller->transceiver)
+ if (!IS_ERR_OR_NULL(udc_controller->transceiver))
udc_controller->gadget.is_otg = 1;

/* setup QH and epctrl for ep0 */
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index 75ff41a..9305de4 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -19,6 +19,7 @@
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/list.h>
@@ -1381,7 +1382,7 @@ static int mv_udc_start(struct usb_gadget_driver *driver,
return retval;
}

- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
retval = otg_set_peripheral(udc->transceiver->otg,
&udc->gadget);
if (retval) {
@@ -2107,7 +2108,7 @@ static int __devexit mv_udc_remove(struct platform_device *dev)
* then vbus irq will not be requested in udc driver.
*/
if (udc->pdata && udc->pdata->vbus
- && udc->clock_gating && udc->transceiver == NULL)
+ && udc->clock_gating && IS_ERR_OR_NULL(udc->transceiver))
free_irq(udc->pdata->vbus->irq, &dev->dev);

/* free memory allocated in probe */
@@ -2325,7 +2326,7 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
eps_init(udc);

/* VBUS detect: we can disable/enable clock on demand.*/
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
udc->clock_gating = 1;
else if (pdata->vbus) {
udc->clock_gating = 1;
@@ -2369,7 +2370,7 @@ static int __devinit mv_udc_probe(struct platform_device *dev)

err_unregister:
if (udc->pdata && udc->pdata->vbus
- && udc->clock_gating && udc->transceiver == NULL)
+ && udc->clock_gating && IS_ERR_OR_NULL(udc->transceiver))
free_irq(pdata->vbus->irq, &dev->dev);
device_unregister(&udc->gadget.dev);
err_free_irq:
@@ -2404,7 +2405,7 @@ static int mv_udc_suspend(struct device *_dev)
struct mv_udc *udc = the_controller;

/* if OTG is enabled, the following will be done in OTG driver*/
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return 0;

if (udc->pdata->vbus && udc->pdata->vbus->poll)
@@ -2437,7 +2438,7 @@ static int mv_udc_resume(struct device *_dev)
int retval;

/* if OTG is enabled, the following will be done in OTG driver*/
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return 0;

if (!udc->clock_gating) {
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index cf8bf26..7b71295 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -35,6 +35,7 @@
#include <linux/usb/otg.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/prefetch.h>

#include <asm/byteorder.h>
@@ -1211,7 +1212,7 @@ static int omap_wakeup(struct usb_gadget *gadget)

/* NOTE: non-OTG systems may use SRP TOO... */
} else if (!(udc->devstat & UDC_ATT)) {
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
retval = otg_start_srp(udc->transceiver->otg);
}
spin_unlock_irqrestore(&udc->lock, flags);
@@ -1343,7 +1344,7 @@ static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
struct omap_udc *udc;

udc = container_of(gadget, struct omap_udc, gadget);
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return usb_phy_set_power(udc->transceiver, mA);
return -EOPNOTSUPP;
}
@@ -1792,12 +1793,12 @@ static void devstate_irq(struct omap_udc *udc, u16 irq_src)
if (devstat & UDC_ATT) {
udc->gadget.speed = USB_SPEED_FULL;
VDBG("connect\n");
- if (!udc->transceiver)
+ if (IS_ERR_OR_NULL(udc->transceiver))
pullup_enable(udc);
// if (driver->connect) call it
} else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
udc->gadget.speed = USB_SPEED_UNKNOWN;
- if (!udc->transceiver)
+ if (IS_ERR_OR_NULL(udc->transceiver))
pullup_disable(udc);
DBG("disconnect, gadget %s\n",
udc->driver->driver.name);
@@ -1837,12 +1838,12 @@ static void devstate_irq(struct omap_udc *udc, u16 irq_src)
udc->driver->suspend(&udc->gadget);
spin_lock(&udc->lock);
}
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
usb_phy_set_suspend(
udc->transceiver, 1);
} else {
VDBG("resume\n");
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
usb_phy_set_suspend(
udc->transceiver, 0);
if (udc->gadget.speed == USB_SPEED_FULL
@@ -2154,7 +2155,7 @@ static int omap_udc_start(struct usb_gadget_driver *driver,
omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);

/* connect to bus through transceiver */
- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
status = otg_set_peripheral(udc->transceiver->otg,
&udc->gadget);
if (status < 0) {
@@ -2201,7 +2202,7 @@ static int omap_udc_stop(struct usb_gadget_driver *driver)
if (machine_without_vbus_sense())
omap_vbus_session(&udc->gadget, 0);

- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
(void) otg_set_peripheral(udc->transceiver->otg, NULL);
else
pullup_disable(udc);
@@ -2866,7 +2867,7 @@ static int __init omap_udc_probe(struct platform_device *pdev)
* but not having one probably means no VBUS detection.
*/
xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (xceiv)
+ if (!IS_ERR_OR_NULL(xceiv))
type = xceiv->label;
else if (config->otg) {
DBG("OTG requires external transceiver!\n");
@@ -2898,7 +2899,7 @@ static int __init omap_udc_probe(struct platform_device *pdev)
case 16:
case 19:
case 25:
- if (!xceiv) {
+ if (IS_ERR_OR_NULL(xceiv)) {
DBG("external transceiver not registered!\n");
type = "unknown";
}
@@ -3010,7 +3011,7 @@ cleanup1:
udc = NULL;

cleanup0:
- if (xceiv)
+ if (!IS_ERR_OR_NULL(xceiv))
usb_put_phy(xceiv);

if (cpu_is_omap16xx() || cpu_is_omap24xx() || cpu_is_omap7xx()) {
@@ -3040,7 +3041,7 @@ static int __exit omap_udc_remove(struct platform_device *pdev)
udc->done = &done;

pullup_disable(udc);
- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
usb_put_phy(udc->transceiver);
udc->transceiver = NULL;
}
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index cc0b1e6..fa8e93c 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -21,6 +21,7 @@
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
@@ -993,7 +994,7 @@ static int pxa25x_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)

udc = container_of(_gadget, struct pxa25x_udc, gadget);

- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return usb_phy_set_power(udc->transceiver, mA);
return -EOPNOTSUPP;
}
@@ -1299,7 +1300,7 @@ fail:
DMSG("registered gadget driver '%s'\n", driver->driver.name);

/* connect to bus through transceiver */
- if (dev->transceiver) {
+ if (!IS_ERR_OR_NULL(dev->transceiver)) {
retval = otg_set_peripheral(dev->transceiver->otg,
&dev->gadget);
if (retval) {
@@ -1359,7 +1360,7 @@ static int pxa25x_stop(struct usb_gadget_driver *driver)
stop_activity(dev, driver);
local_irq_enable();

- if (dev->transceiver)
+ if (!IS_ERR_OR_NULL(dev->transceiver))
(void) otg_set_peripheral(dev->transceiver->otg, NULL);

driver->unbind(&dev->gadget);
@@ -2237,7 +2238,7 @@ lubbock_fail0:
if (gpio_is_valid(dev->mach->gpio_pullup))
gpio_free(dev->mach->gpio_pullup);
err_gpio_pullup:
- if (dev->transceiver) {
+ if (!IS_ERR_OR_NULL(dev->transceiver)) {
usb_put_phy(dev->transceiver);
dev->transceiver = NULL;
}
@@ -2279,7 +2280,7 @@ static int __exit pxa25x_udc_remove(struct platform_device *pdev)

clk_put(dev->clk);

- if (dev->transceiver) {
+ if (!IS_ERR_OR_NULL(dev->transceiver)) {
usb_put_phy(dev->transceiver);
dev->transceiver = NULL;
}
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 8f744aa..644b430 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/list.h>
@@ -1573,7 +1574,7 @@ static int should_enable_udc(struct pxa_udc *udc)
int put_on;

put_on = ((udc->pullup_on) && (udc->driver));
- put_on &= ((udc->vbus_sensed) || (!udc->transceiver));
+ put_on &= ((udc->vbus_sensed) || (IS_ERR_OR_NULL(udc->transceiver)));
return put_on;
}

@@ -1594,7 +1595,7 @@ static int should_disable_udc(struct pxa_udc *udc)
int put_off;

put_off = ((!udc->pullup_on) || (!udc->driver));
- put_off |= ((!udc->vbus_sensed) && (udc->transceiver));
+ put_off |= ((!udc->vbus_sensed) && (!IS_ERR_OR_NULL(udc->transceiver)));
return put_off;
}

@@ -1665,7 +1666,7 @@ static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
struct pxa_udc *udc;

udc = to_gadget_udc(_gadget);
- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return usb_phy_set_power(udc->transceiver, mA);
return -EOPNOTSUPP;
}
@@ -1834,7 +1835,7 @@ static int pxa27x_udc_start(struct usb_gadget_driver *driver,
dev_dbg(udc->dev, "registered gadget driver '%s'\n",
driver->driver.name);

- if (udc->transceiver) {
+ if (!IS_ERR_OR_NULL(udc->transceiver)) {
retval = otg_set_peripheral(udc->transceiver->otg,
&udc->gadget);
if (retval) {
@@ -1908,7 +1909,7 @@ static int pxa27x_udc_stop(struct usb_gadget_driver *driver)
dev_info(udc->dev, "unregistered gadget driver '%s'\n",
driver->driver.name);

- if (udc->transceiver)
+ if (!IS_ERR_OR_NULL(udc->transceiver))
return otg_set_peripheral(udc->transceiver->otg, NULL);
return 0;
}
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index 22326f2..7c91562 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -24,6 +24,7 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
@@ -1165,7 +1166,7 @@ static int s3c_hsudc_start(struct usb_gadget *gadget,
}

/* connect to bus through transceiver */
- if (hsudc->transceiver) {
+ if (!IS_ERR_OR_NULL(hsudc->transceiver)) {
ret = otg_set_peripheral(hsudc->transceiver->otg,
&hsudc->gadget);
if (ret) {
@@ -1220,7 +1221,7 @@ static int s3c_hsudc_stop(struct usb_gadget *gadget,
s3c_hsudc_stop_activity(hsudc);
spin_unlock_irqrestore(&hsudc->lock, flags);

- if (hsudc->transceiver)
+ if (!IS_ERR_OR_NULL(hsudc->transceiver))
(void) otg_set_peripheral(hsudc->transceiver->otg, NULL);

disable_irq(hsudc->irq);
@@ -1249,7 +1250,7 @@ static int s3c_hsudc_vbus_draw(struct usb_gadget *gadget, unsigned mA)
if (!hsudc)
return -ENODEV;

- if (hsudc->transceiver)
+ if (!IS_ERR_OR_NULL(hsudc->transceiver))
return usb_phy_set_power(hsudc->transceiver, mA);

return -EOPNOTSUPP;
@@ -1385,7 +1386,7 @@ err_irq:
err_remap:
release_mem_region(res->start, resource_size(res));
err_res:
- if (hsudc->transceiver)
+ if (!IS_ERR_OR_NULL(hsudc->transceiver))
usb_put_phy(hsudc->transceiver);

regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index ba29058..32865a7 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -27,6 +27,7 @@
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/pm.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/fsl_devices.h>

@@ -146,7 +147,7 @@ static int usb_hcd_fsl_probe(const struct hc_driver *driver,
dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, transceiver=0x%p\n",
hcd, ehci, ehci->transceiver);

- if (ehci->transceiver) {
+ if (!IS_ERR_OR_NULL(ehci->transceiver)) {
retval = otg_set_host(ehci->transceiver->otg,
&ehci_to_hcd(ehci)->self);
if (retval) {
@@ -192,7 +193,7 @@ static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
struct ehci_hcd *ehci = hcd_to_ehci(hcd);

- if (ehci->transceiver) {
+ if (!IS_ERR_OR_NULL(ehci->transceiver)) {
otg_set_host(ehci->transceiver->otg, NULL);
usb_put_phy(ehci->transceiver);
}
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index c7615fb..6b4ffb5 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -146,7 +146,7 @@ static int ehci_msm_probe(struct platform_device *pdev)
* management.
*/
phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!phy) {
+ if (IS_ERR_OR_NULL(phy)) {
dev_err(&pdev->dev, "unable to find transceiver\n");
ret = -ENODEV;
goto unmap;
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
index ef7aa0d..0e8c168 100644
--- a/drivers/usb/host/ehci-mv.c
+++ b/drivers/usb/host/ehci-mv.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/usb/otg.h>
#include <linux/platform_data/mv_usb.h>

@@ -254,7 +255,7 @@ static int mv_ehci_probe(struct platform_device *pdev)
if (ehci_mv->mode == MV_USB_MODE_OTG) {
#ifdef CONFIG_USB_OTG_UTILS
ehci_mv->otg = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!ehci_mv->otg) {
+ if (IS_ERR_OR_NULL(ehci_mv->otg)) {
dev_err(&pdev->dev,
"unable to find transceiver\n");
retval = -ENODEV;
@@ -302,7 +303,7 @@ err_set_vbus:
pdata->set_vbus(0);
#ifdef CONFIG_USB_OTG_UTILS
err_put_transceiver:
- if (ehci_mv->otg)
+ if (!IS_ERR_OR_NULL(ehci_mv->otg))
usb_put_phy(ehci_mv->otg);
#endif
err_disable_clk:
@@ -331,7 +332,7 @@ static int mv_ehci_remove(struct platform_device *pdev)
if (hcd->rh_registered)
usb_remove_hcd(hcd);

- if (ehci_mv->otg) {
+ if (!IS_ERR_OR_NULL(ehci_mv->otg)) {
otg_set_host(ehci_mv->otg->otg, NULL);
usb_put_phy(ehci_mv->otg);
}
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 14df2f5..477ecfa 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -17,6 +17,7 @@
*/

#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/platform_data/tegra_usb.h>
#include <linux/irq.h>
@@ -750,7 +751,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
#ifdef CONFIG_USB_OTG_UTILS
if (pdata->operating_mode == TEGRA_USB_OTG) {
tegra->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
- if (tegra->transceiver)
+ if (!IS_ERR_OR_NULL(tegra->transceiver))
otg_set_host(tegra->transceiver->otg, &hcd->self);
}
#endif
@@ -773,7 +774,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)

fail:
#ifdef CONFIG_USB_OTG_UTILS
- if (tegra->transceiver) {
+ if (!IS_ERR_OR_NULL(tegra->transceiver)) {
otg_set_host(tegra->transceiver->otg, NULL);
usb_put_phy(tegra->transceiver);
}
@@ -808,7 +809,7 @@ static int tegra_ehci_remove(struct platform_device *pdev)
pm_runtime_put_noidle(&pdev->dev);

#ifdef CONFIG_USB_OTG_UTILS
- if (tegra->transceiver) {
+ if (!IS_ERR_OR_NULL(tegra->transceiver)) {
otg_set_host(tegra->transceiver->otg, NULL);
usb_put_phy(tegra->transceiver);
}
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 92a77df..c7b06f5 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -18,6 +18,7 @@
#include <linux/jiffies.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
@@ -212,7 +213,7 @@ static int ohci_omap_init(struct usb_hcd *hcd)
#ifdef CONFIG_USB_OTG
if (need_transceiver) {
ohci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
- if (ohci->transceiver) {
+ if (!IS_ERR_OR_NULL(ohci->transceiver)) {
int status = otg_set_host(ohci->transceiver->otg,
&ohci_to_hcd(ohci)->self);
dev_dbg(hcd->self.controller, "init %s transceiver, status %d\n",
@@ -403,7 +404,7 @@ usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
struct ohci_hcd *ohci = hcd_to_ohci (hcd);

usb_remove_hcd(hcd);
- if (ohci->transceiver) {
+ if (!IS_ERR_OR_NULL(ohci->transceiver)) {
(void) otg_set_host(ohci->transceiver->otg, 0);
usb_put_phy(ohci->transceiver);
}
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 4a8cbf0..7a95ab8 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -29,6 +29,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
@@ -365,7 +366,7 @@ static int am35x_musb_init(struct musb *musb)

usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv)
+ if (IS_ERR_OR_NULL(musb->xceiv))
return -ENODEV;

if (is_host_enabled(musb))
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 4529409..428e6aa 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -15,6 +15,7 @@
#include <linux/list.h>
#include <linux/gpio.h>
#include <linux/io.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/prefetch.h>
@@ -416,7 +417,7 @@ static int bfin_musb_init(struct musb *musb)

usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv) {
+ if (IS_ERR_OR_NULL(musb->xceiv)) {
gpio_free(musb->config->gpio_vrsel);
return -ENODEV;
}
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index d731c80..0f9fcec 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -29,6 +29,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
@@ -426,7 +427,7 @@ static int da8xx_musb_init(struct musb *musb)

usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv)
+ if (IS_ERR_OR_NULL(musb->xceiv))
goto fail;

if (is_host_enabled(musb))
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 582268d..f649204 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -28,6 +28,7 @@
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
@@ -385,7 +386,7 @@ static int davinci_musb_init(struct musb *musb)

usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv)
+ if (IS_ERR_OR_NULL(musb->xceiv))
goto unregister;

musb->mregs += DAVINCI_BASE_OFFSET;
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 92603e4..217808d 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -31,6 +31,7 @@

#include <linux/init.h>
#include <linux/io.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
@@ -377,7 +378,7 @@ static int dsps_musb_init(struct musb *musb)
/* NOP driver needs change if supporting dual instance */
usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv)
+ if (IS_ERR_OR_NULL(musb->xceiv))
return -ENODEV;

/* Returns zero if e.g. not clocked */
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 2813490..5fdb9da 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -320,7 +320,7 @@ static int omap2430_musb_init(struct musb *musb)
* which needs a driver, drivers aren't always needed.
*/
musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
- if (!musb->xceiv) {
+ if (IS_ERR_OR_NULL(musb->xceiv)) {
pr_err("HS USB OTG: no transceiver configured\n");
return -ENODEV;
}
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 8ddf3d5..1a1bd9c 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -17,6 +17,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/prefetch.h>
#include <linux/usb.h>
@@ -1079,7 +1080,7 @@ static int tusb_musb_init(struct musb *musb)

usb_nop_xceiv_register();
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv)
+ if (IS_ERR_OR_NULL(musb->xceiv))
return -ENODEV;

pdev = to_platform_device(musb->controller);
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
index 46cf80a..a8c0fad 100644
--- a/drivers/usb/musb/ux500.c
+++ b/drivers/usb/musb/ux500.c
@@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/clk.h>
+#include <linux/err.h>
#include <linux/io.h>
#include <linux/platform_device.h>

@@ -38,7 +39,7 @@ struct ux500_glue {
static int ux500_musb_init(struct musb *musb)
{
musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!musb->xceiv) {
+ if (IS_ERR_OR_NULL(musb->xceiv)) {
pr_err("HS USB OTG: no transceiver configured\n");
return -ENODEV;
}
diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c
index 0fa4d8c..88d62b1 100644
--- a/drivers/usb/otg/otg.c
+++ b/drivers/usb/otg/otg.c
@@ -67,7 +67,7 @@ struct usb_phy *devm_usb_get_phy(struct device *dev, enum usb_phy_type type)
return NULL;

phy = usb_get_phy(type);
- if (phy) {
+ if (!IS_ERR(phy)) {
*ptr = phy;
devres_add(dev, ptr);
} else
@@ -82,7 +82,7 @@ EXPORT_SYMBOL(devm_usb_get_phy);
* @type - the type of the phy the controller requires
*
* Returns the phy driver, after getting a refcount to it; or
- * null if there is no such phy. The caller is responsible for
+ * -ENODEV if there is no such phy. The caller is responsible for
* calling usb_put_phy() to release that count.
*
* For use by USB host and peripheral drivers.
--
1.7.5.4


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