Commit 616b6937 authored May 09, 2012 by Bjørn Mork Committed by Greg Kroah-Hartman May 11, 2012

USB: cdc-wdm: poll must return POLLHUP if device is gone



Else the poll will be restarted indefinitely in a tight loop,
preventing final device cleanup.

Cc: Oliver Neukum <oliver@neukum.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent b8cacf33

drivers/usb/class/cdc-wdm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -548,7 +548,7 @@ static unsigned int wdm_poll(struct file file, struct poll_table_struct wait)

		spin_lock_irqsave(&desc->iuspin, flags);
		if (test_bit(WDM_DISCONNECTING, &desc->flags)) {
		mask = POLLERR;
		mask = POLLHUP \| POLLERR;
		spin_unlock_irqrestore(&desc->iuspin, flags);
		goto desc_out;
		}

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