[PATCH] libata: check Word 88 validity in ata_id_xfer_mask()
Check bit 2 of Word 53 for Word 88 validity before using Word 88 to determine UDMA mask. Note that the original xfer mask implementation using ata_get_mode_mask() didn't consider bit 2 of Word 53. This patch introduces different (correct) behavior. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Родитель
2044470ccc
Коммит
fb21f0d0ec
|
@ -819,7 +819,10 @@ static unsigned int ata_id_xfermask(const u16 *id)
|
|||
}
|
||||
|
||||
mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
|
||||
udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
|
||||
|
||||
udma_mask = 0;
|
||||
if (id[ATA_ID_FIELD_VALID] & (1 << 2))
|
||||
udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
|
||||
|
||||
return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
|
||||
}
|
||||
|
|
Загрузка…
Ссылка в новой задаче