diff options
| author | Dmitry Osipenko <[email protected]> | 2020-03-19 21:23:21 +0000 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2020-03-23 06:36:24 +0000 |
| commit | 6697255f239f5c04fcd6b819c0d35ae05bbf808c (patch) | |
| tree | a12b493edca015d1c30d63d6ef0d8c055760587b /scripts/documentation-file-ref-check | |
| parent | dmaengine: tegra-apb: Don't save/restore IRQ flags in interrupt handler (diff) | |
| download | kernel-6697255f239f5c04fcd6b819c0d35ae05bbf808c.tar.gz kernel-6697255f239f5c04fcd6b819c0d35ae05bbf808c.zip | |
dmaengine: tegra-apb: Improve DMA synchronization
Boot CPU0 always handles DMA interrupts and under some rare circumstances
it could stuck in uninterruptible state for a significant time (like in a
case of KASAN + NFS root). In this case sibling CPU, which waits for DMA
transfer completion, will get a DMA transfer timeout. In order to handle
this rare condition, interrupt status needs to be polled until interrupt
is handled.
Signed-off-by: Dmitry Osipenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'scripts/documentation-file-ref-check')
0 files changed, 0 insertions, 0 deletions