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| author | Peng Ma <[email protected]> | 2024-02-01 21:50:07 +0000 |
|---|---|---|
| committer | Vinod Koul <[email protected]> | 2024-02-07 08:31:49 +0000 |
| commit | 9d739bccf261dd93ec1babf82f5c5d71dd4caa3e (patch) | |
| tree | 3963d88085c95e8e11422d8b417594f600afc868 /net/unix/af_unix.c | |
| parent | dmaengine: dw-edma: eDMA: Add sync read before starting the DMA transfer in r... (diff) | |
| download | kernel-9d739bccf261dd93ec1babf82f5c5d71dd4caa3e.tar.gz kernel-9d739bccf261dd93ec1babf82f5c5d71dd4caa3e.zip | |
dmaengine: fsl-qdma: fix SoC may hang on 16 byte unaligned read
There is chip (ls1028a) errata:
The SoC may hang on 16 byte unaligned read transactions by QDMA.
Unaligned read transactions initiated by QDMA may stall in the NOC
(Network On-Chip), causing a deadlock condition. Stalled transactions will
trigger completion timeouts in PCIe controller.
Workaround:
Enable prefetch by setting the source descriptor prefetchable bit
( SD[PF] = 1 ).
Implement this workaround.
Cc: [email protected]
Fixes: b092529e0aa0 ("dmaengine: fsl-qdma: Add qDMA controller driver for Layerscape SoCs")
Signed-off-by: Peng Ma <[email protected]>
Signed-off-by: Frank Li <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions