| commit | a1227f3c1030e96ebc51d677d2f636268845c5fb | |
| author | Stanislaw Gruszka <sgruszka@redhat.com> | |
| Wed, 19 Feb 2014 09:29:01 +0000 (19 10:29 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Wed, 26 Feb 2014 23:46:42 +0000 (26 15:46 -0800) | ||
| tree | a886ebd7fb7102a20de3a9fca88bee7efc3f8794 | treesnapshot (tar.gz zip) |
| parent | 6dbd46c849e071e6afc1e0cad489b0175bca9318 | commitdiff |
usb: ehci: fix deadlock when threadirqs option is used
ehci_irq() and ehci_hrtimer_func() can deadlock on ehci->lock when
threadirqs option is used. To prevent the deadlock use
spin_lock_irqsave() in ehci_irq().
This change can be reverted when hrtimer callbacks become threaded.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ehci_irq() and ehci_hrtimer_func() can deadlock on ehci->lock when
threadirqs option is used. To prevent the deadlock use
spin_lock_irqsave() in ehci_irq().
This change can be reverted when hrtimer callbacks become threaded.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/usb/host/ehci-hcd.c | diffblobblamehistory |