[PATCH] usb gadget: don't save bind callback in structusb_composite_driver
From: Michal Nazarewicz
Date: Thu Sep 02 2010 - 01:34:21 EST
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: MichaÅ Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
Acked-by: Uwe Kleine-KÃnig <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/audio.c | 3 +--
drivers/usb/gadget/cdc2.c | 3 +--
drivers/usb/gadget/composite.c | 15 +++++++++++----
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/nokia.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 | 19 +++++--------------
13 files changed, 27 insertions(+), 40 deletions(-)
On Thu, 02 Sep 2010 05:54:50 +0200, Stephen Rothwell wrote:
> After merging the usb tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>
> drivers/usb/gadget/nokia.c:244: error: unknown field 'bind' specified in initializer
> drivers/usb/gadget/nokia.c:244: warning: initialization makes integer from pointer without a cast
> drivers/usb/gadget/nokia.c:244: error: initializer element is not computable at load time
> drivers/usb/gadget/nokia.c:244: error: (near initialization for 'nokia_driver.needs_serial')
> drivers/usb/gadget/nokia.c: In function 'nokia_init':
> drivers/usb/gadget/nokia.c:250: error: implicit declaration of function 'usb_composite_register'
>
> Caused by commit cc604fa9db859b7d6899de807d6bd8df80fc0a1a ("usb gadget:
> don't save bind callback in struct usb_configuration"). The 'bind' and
> 'usb_composite_register' references above were added before 2.6.34-rc1
> but missed in this patch.
Sorry about that. Nokia composite gadget requires Phonet and that's
why I failed to catch this error. (Truly, grep would probably work
better).
Attached is an updated patch that takes nokia.c into consideration as
well. Greg, please replace the non-working version of the patch in
your tree with this one.
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 717de39..3c84002 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -40,6 +40,7 @@
#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.
@@ -1115,7 +1116,7 @@ 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;
@@ -1228,8 +1229,12 @@ 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
@@ -1242,9 +1247,10 @@ 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->iProduct)
@@ -1254,6 +1260,7 @@ 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_register_driver(&composite_driver);
}
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(ð_driver);
+ return usb_composite_probe(ð_driver, eth_bind);
}
module_init(init);
diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index 52fd3fa..9fcb158 100644
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -147,7 +147,6 @@ static struct usb_composite_driver gfs_driver = {
.name = DRIVER_NAME,
.dev = &gfs_dev_desc,
.strings = gfs_dev_strings,
- .bind = gfs_bind,
.unbind = gfs_unbind,
.iProduct = DRIVER_DESC,
};
@@ -187,7 +186,7 @@ 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 05e9bd3..a5e4a77 100644
--- a/drivers/usb/gadget/mass_storage.c
+++ b/drivers/usb/gadget/mass_storage.c
@@ -169,7 +169,6 @@ static int __init msg_bind(struct usb_composite_dev *cdev)
static struct usb_composite_driver msg_driver = {
.name = "g_mass_storage",
.dev = &msg_device_desc,
- .bind = msg_bind,
.iProduct = DRIVER_DESC,
.needs_serial = 1,
};
@@ -180,7 +179,7 @@ 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 ca51661..91170a0 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -353,7 +353,6 @@ static struct usb_composite_driver multi_driver = {
.name = "g_multi",
.dev = &device_desc,
.strings = dev_strings,
- .bind = multi_bind,
.unbind = __exit_p(multi_unbind),
.iProduct = DRIVER_DESC,
.needs_serial = 1,
@@ -362,7 +361,7 @@ static struct usb_composite_driver multi_driver = {
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/nokia.c b/drivers/usb/gadget/nokia.c
index 7d6b66a..8aec728 100644
--- a/drivers/usb/gadget/nokia.c
+++ b/drivers/usb/gadget/nokia.c
@@ -241,13 +241,12 @@ static struct usb_composite_driver nokia_driver = {
.name = "g_nokia",
.dev = &device_desc,
.strings = dev_strings,
- .bind = nokia_bind,
.unbind = __exit_p(nokia_unbind),
};
static int __init nokia_init(void)
{
- return usb_composite_register(&nokia_driver);
+ return usb_composite_probe(&nokia_driver, nokia_bind);
}
module_init(nokia_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 a78e813..e28b662 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -248,11 +248,7 @@ int usb_add_config(struct usb_composite_dev *,
* and language IDs provided in control requests
* @needs_serial: set to 1 if the gadget needs userspace to provide
* a serial number. If one is not provided, warning will be printed.
- * @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
+ * @unbind: Reverses bind; called as a side effect of unregistering
* this driver.
* @disconnect: optional driver disconnect method
* @suspend: Notifies when the host stops sending USB traffic,
@@ -263,7 +259,7 @@ int usb_add_config(struct usb_composite_dev *,
* Devices default to reporting self powered operation. Devices which rely
* on bus powered operation should report this in their @bind() method.
*
- * Before returning from @bind, various fields in the template descriptor
+ * Before returning from bind, various fields in the template descriptor
* may be overridden. These include the idVendor/idProduct/bcdDevice values
* normally to bind the appropriate host side driver, and the three strings
* (iManufacturer, iProduct, iSerialNumber) normally used to provide user
@@ -279,12 +275,6 @@ struct usb_composite_driver {
struct usb_gadget_strings **strings;
unsigned needs_serial:1;
- /* 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 *);
@@ -294,8 +284,9 @@ 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/