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libata-scsi: fix checking of DMA state

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Checking if DMA is enabled should be done via the
ata_dma_enabled helper function, since the init state
0xff indicates disabled.
Change based on code review, not tested due to lack of hardware.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
This commit is contained in:
Reimar Döffinger 2021-10-12 08:27:45 +02:00 committed by Damien Le Moal
parent f971a85439
commit 6ac586f2e7
1 changed files with 2 additions and 2 deletions
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4
drivers/ata/libata-scsi.c
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@ -2981,7 +2981,7 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
ata_qc_set_pc_nbytes(qc);
/* We may not issue DMA commands if no DMA mode is set */
if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) {
fp = 1;
goto invalid_fld;
}
@ -3131,7 +3131,7 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
u8 unmap = cdb[1] & 0x8;
/* we may not issue DMA commands if no DMA mode is set */
if (unlikely(!dev->dma_mode))
if (unlikely(!ata_dma_enabled(dev)))
goto invalid_opcode;
/*