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| author | Albert Lee <albertcc@tw.ibm.com> | 2005-12-06 11:34:59 +0800 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-12-06 04:49:23 -0500 |
| commit | fe79e683ccdb29c13b3e0d18507474b4e2d9aab6 (patch) | |
| tree | 855a61daec6898c089d135f54ab1fd6283edf27b /drivers/scsi | |
| parent | d8fe452b3e8e9ea6d62a3d116a092999fabae407 (diff) | |
| download | op-kernel-dev-fe79e683ccdb29c13b3e0d18507474b4e2d9aab6.zip op-kernel-dev-fe79e683ccdb29c13b3e0d18507474b4e2d9aab6.tar.gz | |
[PATCH] libata: err_mask misc fix
1. ata_pio_complete():
It seems unnecessary to wait for the clearing of the DRQ bit.
(Waiting for BSY=0 should be enough.
ata_ok() also checks the correctness of the status bits later.)
2. ata_pio_block():
- added error checking, before transfering data.
- minor comments fix
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
============
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/libata-core.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c index b3aedb0..e4c4007 100644 --- a/drivers/scsi/libata-core.c +++ b/drivers/scsi/libata-core.c @@ -2865,11 +2865,11 @@ static int ata_pio_complete (struct ata_port *ap) * msecs, then chk-status again. If still busy, fall back to * HSM_ST_POLL state. */ - drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); - if (drv_stat & (ATA_BUSY | ATA_DRQ)) { + drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); + if (drv_stat & ATA_BUSY) { msleep(2); - drv_stat = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 10); - if (drv_stat & (ATA_BUSY | ATA_DRQ)) { + drv_stat = ata_busy_wait(ap, ATA_BUSY, 10); + if (drv_stat & ATA_BUSY) { ap->hsm_task_state = HSM_ST_LAST_POLL; ap->pio_task_timeout = jiffies + ATA_TMOUT_PIO; return 0; @@ -3236,8 +3236,16 @@ static void ata_pio_block(struct ata_port *ap) qc = ata_qc_from_tag(ap, ap->active_tag); assert(qc != NULL); + /* check error */ + if (status & (ATA_ERR | ATA_DF)) { + qc->err_mask |= AC_ERR_DEV; + ap->hsm_task_state = HSM_ST_ERR; + return; + } + + /* transfer data if any */ if (is_atapi_taskfile(&qc->tf)) { - /* no more data to transfer or unsupported ATAPI command */ + /* DRQ=0 means no more data to transfer */ if ((status & ATA_DRQ) == 0) { ap->hsm_task_state = HSM_ST_LAST; return; |
