Ben Hutchings 711c68b3c0 cdc-wdm: Fix more races on the read path ... We must not allow the input buffer length to change while we're shuffling the buffer contents. We also mustn't clear the WDM_READ flag after more data might have arrived. Therefore move both of these into the spinlocked region at the bottom of wdm_read(). When reading desc->length without holding the iuspin lock, use ACCESS_ONCE() to ensure the compiler doesn't re-read it with inconsistent results. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Tested-by: Bjørn Mork <bjorn@mork.no> Cc: Oliver Neukum <oliver@neukum.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-02-24 13:11:56 -08:00
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staging	usb-serial: use new registration API in staging drivers	2012-02-24 12:39:22 -08:00
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usb	cdc-wdm: Fix more races on the read path	2012-02-24 13:11:56 -08:00
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