Commit 725ad028 authored by Huacai Chen's avatar Huacai Chen Committed by Niklas Cassel
Browse files

ata: libata: Improve return value of atapi_check_dma() 



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: default avatarHuacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/r/20250312133954.6666-1-chenhuacai@loongson.cn


[cassel: improve commit log]
Signed-off-by: default avatarNiklas Cassel <cassel@kernel.org>
parent 885251dc

drivers/ata/libata-core.c

+1 −1
Original line number Diff line number Diff line
@@ -4579,7 +4579,7 @@ int atapi_check_dma(struct ata_queued_cmd *qc) 
	 */

	if (!(qc->dev->quirks & ATA_QUIRK_ATAPI_MOD16_DMA) &&

	    unlikely(qc->nbytes & 15))

		return 1;

		return -EOPNOTSUPP;



	if (ap->ops->check_atapi_dma)

		return ap->ops->check_atapi_dma(qc);