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[libata] revert new check-ready Status register logic

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This behavior differs across multiple controllers, so we cannot use
common logic for all controllers.

Revert back to the basic common behavior, and specific drivers will
be updated from here to take into account the unusual Status return
values.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jeff Garzik 2008-05-09 15:00:55 -04:00 committed by Jeff Garzik
parent 28a4acb485
commit 005b1f7495
1 changed files with 3 additions and 6 deletions
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9
include/linux/libata.h
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@ -1384,17 +1384,14 @@ static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
static inline int ata_check_ready(u8 status)
{
/* Some controllers report 0x77 or 0x7f during intermediate
* not-ready stages.
*/
if (status == 0x77 || status == 0x7f)
return 0;
if (!(status & ATA_BUSY))
return 1;
/* 0xff indicates either no device or device not ready */
if (status == 0xff)
return -ENODEV;
return !(status & ATA_BUSY);
return 0;
}