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ata: libata: Improve return value of atapi_check_dma()

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atapi_check_dma() allows a LLD to filter ATAPI commands, returning a
status indicating whether or not it is OK to use DMA for the supplied
ATAPI command.

Change atapi_check_dma() to return -EOPNOTSUPP instead of 1 for an
ATAPI command that is not allowed to use DMA.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/r/20250312133954.6666-1-chenhuacai@loongson.cn
[cassel: improve commit log]
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
Huacai Chen
2025-04-30 15:54:47 +08:00
committed by maoxiaochuan
parent a3d4bda8ab
commit 4e8b49b325
1 changed files with 1 additions and 1 deletions
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drivers/ata/libata-core.c
+1 -1
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@@ -4544,7 +4544,7 @@ int atapi_check_dma(struct ata_queued_cmd *qc)
*/ */
if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) && if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) &&
unlikely(qc->nbytes & 15)) unlikely(qc->nbytes & 15))
return 1; return -EOPNOTSUPP;
if (ap->ops->check_atapi_dma) if (ap->ops->check_atapi_dma)
return ap->ops->check_atapi_dma(qc); return ap->ops->check_atapi_dma(qc);