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usb: otg: nop: fix oops triggered by otg_register_notifier

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This patch adds BLOCKING_INIT_NOTIFIER_HEAD in nop_usb_xceiv_probe,
so that we can avoid oops caused by uninitialized
nop->otg.notifier.rwsem which will be touched in otg_register_notifier
path.

Reported-by: Gupta, Ajay Kumar <ajay.gupta@ti.com>
Tested-by: Gupta, Ajay Kumar <ajay.gupta@ti.com>
Cc: Balbi, Felipe <balbi@ti.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ming Lei 2011-01-04 20:21:32 +08:00 committed by Greg Kroah-Hartman
parent 0cdfb819b6
commit 20831ad239
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/otg/nop-usb-xceiv.c
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@ -132,6 +132,8 @@ static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, nop);
BLOCKING_INIT_NOTIFIER_HEAD(&nop->otg.notifier);
return 0;
exit:
kfree(nop);