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[PATCH] libata: clear only affected flags during ata_dev_configure()

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ata_dev_configure() should not clear dynamic device flags determined
elsewhere.  Lower eight bits are reserved for feature flags, define
ATA_DFLAG_CFG_MASK and clear only those bits before configuring
device.  Without this patch, ATA_DFLAG_PIO gets turned off during
revalidation making PIO mode unuseable.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-04-02 18:51:53 +09:00 committed by Jeff Garzik
parent 198e0fed9e
commit ea1dd4e130
2 changed files with 2 additions and 1 deletions
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2
drivers/scsi/libata-core.c
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@ -1241,7 +1241,7 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
id[84], id[85], id[86], id[87], id[88]);
/* initialize to-be-configured parameters */
dev->flags = 0;
dev->flags &= ~ATA_DFLAG_CFG_MASK;
dev->max_sectors = 0;
dev->cdb_len = 0;
dev->n_sectors = 0;

1
include/linux/libata.h
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@ -122,6 +122,7 @@ enum {
/* struct ata_device stuff */
ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */