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Subject[PATCH 2/3] usb gadget: don't save bind callback in struct usb_composite_driver
The bind function is most of the time only called at init time so there
is no need to save a pointer to it in the composite driver structure.

This fixes many section mismatches reported by modpost.

Signed-off-by: Michał Nazarewicz <m.nazarewicz@samsung.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/audio.c | 3 +--
drivers/usb/gadget/cdc2.c | 3 +--
drivers/usb/gadget/composite.c | 19 +++++++++++++------
drivers/usb/gadget/ether.c | 3 +--
drivers/usb/gadget/g_ffs.c | 3 +--
drivers/usb/gadget/hid.c | 3 +--
drivers/usb/gadget/mass_storage.c | 3 +--
drivers/usb/gadget/multi.c | 3 +--
drivers/usb/gadget/serial.c | 3 +--
drivers/usb/gadget/webcam.c | 3 +--
drivers/usb/gadget/zero.c | 3 +--
include/linux/usb/composite.h | 15 +++------------
12 files changed, 26 insertions(+), 38 deletions(-)
This replaces Uwe's patch which used __refdata for instances of struct
usb_composite_driver. This patch replaces usb_composite_register() with
usb_composite_probe() in similar fashion to other two Uwe's patches.

diff --git a/drivers/usb/gadget/audio.c b/drivers/usb/gadget/audio.c
index a62af7b..5a65fbb 100644
--- a/drivers/usb/gadget/audio.c
+++ b/drivers/usb/gadget/audio.c
@@ -166,13 +166,12 @@ static struct usb_composite_driver audio_driver = {
.name = "g_audio",
.dev = &device_desc,
.strings = audio_strings,
- .bind = audio_bind,
.unbind = __exit_p(audio_unbind),
};

static int __init init(void)
{
- return usb_composite_register(&audio_driver);
+ return usb_composite_probe(&audio_driver, audio_bind);
}
module_init(init);

diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index 928137d..1f2a9b1 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -245,7 +245,6 @@ static struct usb_composite_driver cdc_driver = {
.name = "g_cdc",
.dev = &device_desc,
.strings = dev_strings,
- .bind = cdc_bind,
.unbind = __exit_p(cdc_unbind),
};

@@ -255,7 +254,7 @@ MODULE_LICENSE("GPL");

static int __init init(void)
{
- return usb_composite_register(&cdc_driver);
+ return usb_composite_probe(&cdc_driver, cdc_bind);
}
module_init(init);

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 4590c6a..3cafda7 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -39,6 +39,7 @@
#define USB_BUFSIZ 1024

static struct usb_composite_driver *composite;
+static int (*composite_gadget_bind)(struct usb_composite_dev *cdev);

/* Some systems will need runtime overrides for the product identifers
* published in the device descriptor, either numbers or strings or both.
@@ -1094,15 +1095,15 @@ static int composite_bind(struct usb_gadget *gadget)
* serial number), register function drivers, potentially update
* power state and consumption, etc
*/
- status = composite->bind(cdev);
+ status = composite_gadget_bind(cdev);
if (status < 0)
goto fail;

cdev->desc = *composite->dev;
cdev->desc.bMaxPacketSize0 = gadget->ep0->maxpacket;

- /* strings can't be assigned before bind() allocates the
- * releavnt identifiers
+ /* strings can't be assigned before composite_gadget_bind()
+ * allocates the releavnt identifiers
*/
if (cdev->desc.iManufacturer && iManufacturer)
string_override(composite->strings,
@@ -1191,8 +1192,12 @@ static struct usb_gadget_driver composite_driver = {
};

/**
- * usb_composite_register() - register a composite driver
+ * usb_composite_probe() - register a composite driver
* @driver: the driver to register
+ * @bind: the callback used to allocate resources that are shared across the
+ * whole device, such as string IDs, and add its configurations using
+ * @usb_add_config(). This may fail by returning a negative errno
+ * value; it should return zero on successful initialization.
* Context: single threaded during gadget setup
*
* This function is used to register drivers using the composite driver
@@ -1205,9 +1210,10 @@ static struct usb_gadget_driver composite_driver = {
* while it was binding. That would usually be done in order to wait for
* some userspace participation.
*/
-int usb_composite_register(struct usb_composite_driver *driver)
+extern int usb_composite_probe(struct usb_composite_driver *driver,
+ int (*bind)(struct usb_composite_dev *cdev))
{
- if (!driver || !driver->dev || !driver->bind || composite)
+ if (!driver || !driver->dev || !bind || composite)
return -EINVAL;

if (!driver->name)
@@ -1215,6 +1221,7 @@ int usb_composite_register(struct usb_composite_driver *driver)
composite_driver.function = (char *) driver->name;
composite_driver.driver.name = driver->name;
composite = driver;
+ composite_gadget_bind = bind;

return usb_gadget_probe_driver(&composite_driver, composite_bind);
}
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 400f803..33076bc 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -402,7 +402,6 @@ static struct usb_composite_driver eth_driver = {
.name = "g_ether",
.dev = &device_desc,
.strings = dev_strings,
- .bind = eth_bind,
.unbind = __exit_p(eth_unbind),
};

@@ -412,7 +411,7 @@ MODULE_LICENSE("GPL");

static int __init init(void)
{
- return usb_composite_register(&eth_driver);
+ return usb_composite_probe(&eth_driver, eth_bind);
}
module_init(init);

diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index a9474f8..6ab2d74 100644
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -171,7 +171,6 @@ static struct usb_composite_driver gfs_driver = {
.name = gfs_short_name,
.dev = &gfs_dev_desc,
.strings = gfs_dev_strings,
- .bind = gfs_bind,
.unbind = gfs_unbind,
};

@@ -210,7 +209,7 @@ static int functionfs_ready_callback(struct ffs_data *ffs)
return -EBUSY;

gfs_ffs_data = ffs;
- ret = usb_composite_register(&gfs_driver);
+ ret = usb_composite_probe(&gfs_driver, gfs_bind);
if (unlikely(ret < 0))
clear_bit(0, &gfs_registered);
return ret;
diff --git a/drivers/usb/gadget/hid.c b/drivers/usb/gadget/hid.c
index 7757226..77f4952 100644
--- a/drivers/usb/gadget/hid.c
+++ b/drivers/usb/gadget/hid.c
@@ -256,7 +256,6 @@ static struct usb_composite_driver hidg_driver = {
.name = "g_hid",
.dev = &device_desc,
.strings = dev_strings,
- .bind = hid_bind,
.unbind = __exit_p(hid_unbind),
};

@@ -282,7 +281,7 @@ static int __init hidg_init(void)
if (status < 0)
return status;

- status = usb_composite_register(&hidg_driver);
+ status = usb_composite_probe(&hidg_driver, hid_bind);
if (status < 0)
platform_driver_unregister(&hidg_plat_driver);

diff --git a/drivers/usb/gadget/mass_storage.c b/drivers/usb/gadget/mass_storage.c
index 306098f..a992c78 100644
--- a/drivers/usb/gadget/mass_storage.c
+++ b/drivers/usb/gadget/mass_storage.c
@@ -231,7 +231,6 @@ static struct usb_composite_driver msg_driver = {
.name = "g_mass_storage",
.dev = &msg_device_desc,
.strings = dev_strings,
- .bind = msg_bind,
};

MODULE_DESCRIPTION(DRIVER_DESC);
@@ -240,7 +239,7 @@ MODULE_LICENSE("GPL");

static int __init msg_init(void)
{
- return usb_composite_register(&msg_driver);
+ return usb_composite_probe(&msg_driver, msg_bind);
}
module_init(msg_init);

diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 795d762..384b3e1 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -368,14 +368,13 @@ static struct usb_composite_driver multi_driver = {
.name = "g_multi",
.dev = &device_desc,
.strings = dev_strings,
- .bind = multi_bind,
.unbind = __exit_p(multi_unbind),
};


static int __init multi_init(void)
{
- return usb_composite_register(&multi_driver);
+ return usb_composite_probe(&multi_driver, multi_bind);
}
module_init(multi_init);

diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index f46a609..0b81d7b 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -242,7 +242,6 @@ static struct usb_composite_driver gserial_driver = {
.name = "g_serial",
.dev = &device_desc,
.strings = dev_strings,
- .bind = gs_bind,
};

static int __init init(void)
@@ -271,7 +270,7 @@ static int __init init(void)
}
strings_dev[STRING_DESCRIPTION_IDX].s = serial_config_driver.label;

- return usb_composite_register(&gserial_driver);
+ return usb_composite_probe(&gserial_driver, gs_bind);
}
module_init(init);

diff --git a/drivers/usb/gadget/webcam.c b/drivers/usb/gadget/webcam.c
index 288d211..de65b80 100644
--- a/drivers/usb/gadget/webcam.c
+++ b/drivers/usb/gadget/webcam.c
@@ -373,14 +373,13 @@ static struct usb_composite_driver webcam_driver = {
.name = "g_webcam",
.dev = &webcam_device_descriptor,
.strings = webcam_device_strings,
- .bind = webcam_bind,
.unbind = webcam_unbind,
};

static int __init
webcam_init(void)
{
- return usb_composite_register(&webcam_driver);
+ return usb_composite_probe(&webcam_driver, webcam_bind);
}

static void __exit
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index 807280d..6d16db9 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -340,7 +340,6 @@ static struct usb_composite_driver zero_driver = {
.name = "zero",
.dev = &device_desc,
.strings = dev_strings,
- .bind = zero_bind,
.unbind = zero_unbind,
.suspend = zero_suspend,
.resume = zero_resume,
@@ -351,7 +350,7 @@ MODULE_LICENSE("GPL");

static int __init init(void)
{
- return usb_composite_register(&zero_driver);
+ return usb_composite_probe(&zero_driver, zero_bind);
}
module_init(init);

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index 890bc14..ff37718 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -241,10 +241,6 @@ int usb_add_config(struct usb_composite_dev *,
* identifiers.
* @strings: tables of strings, keyed by identifiers assigned during bind()
* and language IDs provided in control requests
- * @bind: (REQUIRED) Used to allocate resources that are shared across the
- * whole device, such as string IDs, and add its configurations using
- * @usb_add_config(). This may fail by returning a negative errno
- * value; it should return zero on successful initialization.
* @unbind: Reverses @bind(); called as a side effect of unregistering
* this driver.
* @suspend: Notifies when the host stops sending USB traffic,
@@ -268,12 +264,6 @@ struct usb_composite_driver {
const struct usb_device_descriptor *dev;
struct usb_gadget_strings **strings;

- /* REVISIT: bind() functions can be marked __init, which
- * makes trouble for section mismatch analysis. See if
- * we can't restructure things to avoid mismatching...
- */
-
- int (*bind)(struct usb_composite_dev *);
int (*unbind)(struct usb_composite_dev *);

void (*disconnect)(struct usb_composite_dev *);
@@ -283,8 +273,9 @@ struct usb_composite_driver {
void (*resume)(struct usb_composite_dev *);
};

-extern int usb_composite_register(struct usb_composite_driver *);
-extern void usb_composite_unregister(struct usb_composite_driver *);
+extern int usb_composite_probe(struct usb_composite_driver *driver,
+ int (*bind)(struct usb_composite_dev *cdev));
+extern void usb_composite_unregister(struct usb_composite_driver *driver);


/**
--
1.7.1
--
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