usb: otg: nop: fix oops triggered by otg_register_notifier
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>
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@ -132,6 +132,8 @@ static int __devinit nop_usb_xceiv_probe(struct platform_device *pdev)
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platform_set_drvdata(pdev, nop);
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BLOCKING_INIT_NOTIFIER_HEAD(&nop->otg.notifier);
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return 0;
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exit:
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kfree(nop);
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