linux_old1/drivers/vfio
Alex Williamson db7d4d7f40 vfio: Fix runaway interruptible timeout
Commit 13060b64b8 ("vfio: Add and use device request op for vfio
bus drivers") incorrectly makes use of an interruptible timeout.
When interrupted, the signal remains pending resulting in subsequent
timeouts occurring instantly.  This makes the loop spin at a much
higher rate than intended.

Instead of making this completely non-interruptible, we can change
this into a sort of interruptible-once behavior and use the "once"
to log debug information.  The driver API doesn't allow us to abort
and return an error code.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Fixes: 13060b64b8
Cc: stable@vger.kernel.org # v4.0
2015-05-01 16:31:41 -06:00
..
pci vfio-pci: Log device requests more verbosely 2015-05-01 14:00:53 -06:00
platform vfio: Split virqfd into a separate module for vfio bus drivers 2015-03-17 08:33:38 -06:00
Kconfig vfio: Split virqfd into a separate module for vfio bus drivers 2015-03-17 08:33:38 -06:00
Makefile vfio: Split virqfd into a separate module for vfio bus drivers 2015-03-17 08:33:38 -06:00
vfio.c vfio: Fix runaway interruptible timeout 2015-05-01 16:31:41 -06:00
vfio_iommu_spapr_tce.c drivers/vfio: EEH support for VFIO PCI device 2014-08-05 15:28:48 +10:00
vfio_iommu_type1.c vfio/type1: Add conditional rescheduling 2015-02-06 14:19:12 -07:00
vfio_spapr_eeh.c drivers/vfio: Export vfio_spapr_iommu_eeh_ioctl() with GPL 2014-09-29 10:31:51 -06:00
virqfd.c vfio: Split virqfd into a separate module for vfio bus drivers 2015-03-17 08:33:38 -06:00