diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2010-09-29 09:54:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-22 10:59:57 -0800 |
| commit | 5b6ebed8ce478bf5392091c1359af3241ccea6e4 (patch) | |
| tree | e6954cfcfacd8c2132741bbcba8dfdb87e652731 | |
| parent | 3c95a4f95e6c492af203105c7d9315a9e0164b63 (diff) | |
USB: MUSB: fix kernel WARNING/oops when unloading module in OTG mode
commit f405387435a85a440d1ce16f3ca36e042281643a upstream.
Since commit 461972d8a4c94bc44f11a13046041c78a7cf18dd (musb_core: don't call
musb_platform_exit() twice), unloading the driver module results in a WARNING
"kobject: '(null)' (c73de788): is not initialized, yet kobject_put() is being
called." (or even kernel oops) on e.g. DaVincis, though only in the OTG mode.
There exists dubious and unbalanced put_device() call in musb_free() which
takes place only in the OTG mode. As this commit caused musb_platform_exit()
to be called (and so unregister the NOP transceiver) before this put_device()
call, this function references already freed memory.
On the other hand, all the glue layers miss the otg_put_transceiver() call,
complementary to the otg_get_transceiver() call that they do. So, I think
the solution is to get rid of the strange put_device() call, and instead
call otg_put_transceiver() in the glue layers...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/musb/blackfin.c | 1 | ||||
| -rw-r--r-- | drivers/usb/musb/davinci.c | 2 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 4 | ||||
| -rw-r--r-- | drivers/usb/musb/omap2430.c | 1 | ||||
| -rw-r--r-- | drivers/usb/musb/tusb6010.c | 4 |
5 files changed, 8 insertions, 4 deletions
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c index b611420a8050..9733fe9b597a 100644 --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -397,5 +397,6 @@ int musb_platform_exit(struct musb *musb) gpio_free(musb->config->gpio_vrsel); + otg_put_transceiver(musb->xceiv); return 0; } diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 57624361c1de..6e67629f50cc 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -446,6 +446,7 @@ int __init musb_platform_init(struct musb *musb, void *board_data) fail: clk_disable(musb->clock); + otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); return -ENODEV; } @@ -496,6 +497,7 @@ int musb_platform_exit(struct musb *musb) clk_disable(musb->clock); + otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); return 0; diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 3b795c56221f..fbb768d2545b 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1922,10 +1922,6 @@ static void musb_free(struct musb *musb) dma_controller_destroy(c); } -#ifdef CONFIG_USB_MUSB_OTG - put_device(musb->xceiv->dev); -#endif - #ifdef CONFIG_USB_MUSB_HDRC_HCD usb_put_hcd(musb_to_hcd(musb)); #else diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index e06d65e36bf7..d57d9a412a8a 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -326,5 +326,6 @@ int musb_platform_exit(struct musb *musb) musb_platform_suspend(musb); + otg_put_transceiver(musb->xceiv); return 0; } diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c index 3c48e77a0aa2..bde40efc7046 100644 --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -1152,6 +1152,8 @@ done: if (ret < 0) { if (sync) iounmap(sync); + + otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); } return ret; @@ -1166,6 +1168,8 @@ int musb_platform_exit(struct musb *musb) musb->board_set_power(0); iounmap(musb->sync_va); + + otg_put_transceiver(musb->xceiv); usb_nop_xceiv_unregister(); return 0; } |