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Subject[PATCH v2 06/17 2/2] mfd: sm501: Adjust 12 checks for null pointers
From
Date
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Thu, 8 Mar 2018 14:20:06 +0100

The script “checkpatch.pl” pointed information out like the following.

Comparison to NULL could be written …

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---

v2:
Lee Jones requested a resend for this patch. The change was rebased
on source files from Linux next-20180308.

drivers/mfd/sm501.c | 26 +++++++++++---------------
1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 4f4957ea8fa3..55d19fd0994e 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1050,13 +1050,13 @@ static int sm501_register_gpio(struct sm501_devdata *sm)
spin_lock_init(&gpio->lock);

gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio");
- if (gpio->regs_res == NULL) {
+ if (!gpio->regs_res) {
dev_err(sm->dev, "gpio: failed to request region\n");
return -ENXIO;
}

gpio->regs = ioremap(iobase, 0x20);
- if (gpio->regs == NULL) {
+ if (!gpio->regs) {
dev_err(sm->dev, "gpio: failed to remap registers\n");
ret = -ENXIO;
goto err_claimed;
@@ -1358,7 +1358,7 @@ static int sm501_init_dev(struct sm501_devdata *sm)
sm501_register_gpio(sm);
}

- if (pdata && pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
+ if (pdata && pdata->gpio_i2c && pdata->gpio_i2c_nr > 0) {
if (!sm501_gpio_isregistered(sm))
dev_err(sm->dev, "no gpio available for i2c gpio.\n");
else
@@ -1384,7 +1384,7 @@ static int sm501_plat_probe(struct platform_device *dev)
int ret;

sm = kzalloc(sizeof(*sm), GFP_KERNEL);
- if (sm == NULL) {
+ if (!sm) {
ret = -ENOMEM;
goto err1;
}
@@ -1402,8 +1402,7 @@ static int sm501_plat_probe(struct platform_device *dev)

sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-
- if (sm->io_res == NULL || sm->mem_res == NULL) {
+ if (!sm->io_res || !sm->mem_res) {
dev_err(&dev->dev, "failed to get IO resource\n");
ret = -ENOENT;
goto err_res;
@@ -1411,8 +1410,7 @@ static int sm501_plat_probe(struct platform_device *dev)

sm->regs_claim = request_mem_region(sm->io_res->start,
0x100, "sm501");
-
- if (sm->regs_claim == NULL) {
+ if (!sm->regs_claim) {
dev_err(&dev->dev, "cannot claim registers\n");
ret = -EBUSY;
goto err_res;
@@ -1421,8 +1419,7 @@ static int sm501_plat_probe(struct platform_device *dev)
platform_set_drvdata(dev, sm);

sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
-
- if (sm->regs == NULL) {
+ if (!sm->regs) {
dev_err(&dev->dev, "cannot remap registers\n");
ret = -EIO;
goto err_claim;
@@ -1448,7 +1445,7 @@ static void sm501_set_power(struct sm501_devdata *sm, int on)
{
struct sm501_platdata *pd = sm->platdata;

- if (pd == NULL)
+ if (!pd)
return;

if (pd->get_power) {
@@ -1573,7 +1570,7 @@ static int sm501_pci_probe(struct pci_dev *dev,
int err;

sm = kzalloc(sizeof(*sm), GFP_KERNEL);
- if (sm == NULL) {
+ if (!sm) {
err = -ENOMEM;
goto err1;
}
@@ -1624,15 +1621,14 @@ static int sm501_pci_probe(struct pci_dev *dev,

sm->regs_claim = request_mem_region(sm->io_res->start,
0x100, "sm501");
- if (sm->regs_claim == NULL) {
+ if (!sm->regs_claim) {
dev_err(&dev->dev, "cannot claim registers\n");
err= -EBUSY;
goto err3;
}

sm->regs = pci_ioremap_bar(dev, 1);
-
- if (sm->regs == NULL) {
+ if (!sm->regs) {
dev_err(&dev->dev, "cannot remap registers\n");
err = -EIO;
goto err4;
--
2.16.2
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