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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2010-09-29 09:54:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:21:58 -0700 |
| commit | f405387435a85a440d1ce16f3ca36e042281643a (patch) | |
| tree | a92a1723beca4c3bc350f1c9e3843c98eaf0a9ce /drivers/usb/musb/davinci.c | |
| parent | 230f7ede6c2f0e403f29e03e0251a470aa9350dd (diff) | |
| download | linux-f405387435a85a440d1ce16f3ca36e042281643a.tar.bz2 | |
USB: MUSB: fix kernel WARNING/oops when unloading module in OTG mode
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>
Cc: stable <stable@kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/musb/davinci.c')
| -rw-r--r-- | drivers/usb/musb/davinci.c | 2 |
1 files changed, 2 insertions, 0 deletions
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; |