[PATCH 0/2] dmaengine: dw-axi-dmac: Fix burst length encoding and LLI dump

[Jia Wang]

The first patch converts the configured AXI burst length from a beat count
to the ARLEN/AWLEN encoding when constructing hardware descriptors. Without
this conversion, a 256-beat burst overflows the 8-bit hardware fields and
may cause DMA transfer errors.

The second patch bounds the error-path LLI dump by the number of
descriptors in the current transaction. This prevents an original DMA error
from being followed by an out-of-bounds access and kernel panic while
dumping LLIs.

The series was tested with dmatest on all eight channels using
snps,axi-max-burst-len = <256>. All channels completed without errors.

Signed-off-by: Jia Wang <wangjia@xxxxxxxxxxxxx>
---
Jia Wang (2):
      dmaengine: dw-axi-dmac: Fix AXI burst length encoding
      dmaengine: dw-axi-dmac: Fix LLI dump out-of-bounds access

 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
base-commit: 1b78070aaef63512688aebfbc82365ef9d6660f1
change-id: 20260827-dma-fix-c2b27795ce12

Best regards,
--  
Jia Wang <wangjia@xxxxxxxxxxxxx>