diff options
| author | Alexandre Bounine <[email protected]> | 2013-05-24 15:55:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-05-24 16:22:51 -0700 |
| commit | 1ccc819da6fda9bee10ab8b72e9adbb5ad3e4959 (patch) | |
| tree | ffe3a4cc65e4061d78cc093c705b39321a059e95 /lib/mpi/mpi-bit.c | |
| parent | fb09c3733a94b5f1dba50359d09c9e217c763fb9 (diff) | |
rapidio/tsi721: fix bug in MSI interrupt handling
Fix bug in MSI interrupt handling which causes loss of event
notifications.
Typical indication of lost MSI interrupts are stalled message and
doorbell transfers between RapidIO endpoints. To avoid loss of MSI
interrupts all interrupts from the device must be disabled on entering
the interrupt handler routine and re-enabled when exiting it.
Re-enabling device interrupts will trigger new MSI message(s) if Tsi721
registered new events since entering interrupt handler routine.
This patch is applicable to kernel versions starting from v3.2.
Signed-off-by: Alexandre Bounine <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-bit.c')
0 files changed, 0 insertions, 0 deletions