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| author | Matthew Whitehead <tedheadster@gmail.com> | 2026-09-29 10:45:28 -0400 |
|---|---|---|
| committer | Martin K. Petersen (Oracle) <mkp@kernel.org> | 2026-10-28 21:34:57 -0400 |
| commit | 9ec6671b137de06f0345962fb8091466b7d56a96 (patch) | |
| tree | 256d2411b9669f8c25ceb6c9a65c648cb46b5573 /scripts/dummy-tools/python3 | |
| parent | ba80a742b3e184b1af8f1ce636105e67f7cedb14 (diff) | |
scsi: aha1542: Remove unneeded scsi_dma_unmap() call
aha1542 never DMA maps the command's scatterlist. Data is bounced
through a per-command buffer allocated with dma_alloc_coherent() in
aha1542_init_cmd_priv(), the adapter is programmed with
acmd->data_buffer_handle, and the payload is copied to and from the
request segments in aha1542_queuecommand() and aha1542_free_cmd().
The scsi_dma_unmap() call left in aha1542_free_cmd() therefore unmaps
a scatterlist that was never mapped. With CONFIG_DMA_API_DEBUG enabled
this results in:
device driver tries to free DMA memory it has not allocated
[device address=0x0000000000000000] [size=0 bytes]
Remove the call.
Verified by testing on real hardware.
Fixes: 2f2fef022c3e ("aha1542: use a local bounce buffer")
Suggested-by: Laurence Oberman <loberman@redhat.com>
Assisted-by: LLM
Signed-off-by: Matthew Whitehead <tedheadster@gmail.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Link: https://patch.msgid.link/20260929144528.7061-1-tedheadster@gmail.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>
Diffstat (limited to 'scripts/dummy-tools/python3')
0 files changed, 0 insertions, 0 deletions