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authorBjørn Mork <bjorn@mork.no>2012-05-09 13:53:21 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-11 15:19:22 -0700
commit616b6937e348ef2b4c6ea5fef2cd3c441145efb0 (patch)
tree0bd0944b6ee1a84b45dc7f002c05ebba204fc965 /drivers/usb/class
parentb8cacf33f09c60208a914b36b3e6de8e9ba228d5 (diff)
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>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-wdm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 5d151653ae43..765227575d3b 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -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;
}