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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-10-29 17:58:21 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-10-29 17:58:21 (GMT) |
| commit | ac19bff25b6834d858274406a686f2227dd8489d (patch) | |
| tree | d77670070abc662b6b14b5a9f9d6c08a56a476a9 /drivers/scsi/sata_vsc.c | |
| parent | 9dfb7808fb05643b0d06df7411b94d9546696bf1 (diff) | |
| download | linux-ac19bff25b6834d858274406a686f2227dd8489d.tar.xz | |
[libata] ensure ->tf_read() hook reads Status and Error registers
We want ->tf_read() to get a complete snapshot of all taskfile
registers, without requiring the callers to manually call
ata_chk_status() and ata_chk_err() themselves.
This also fixes a minor bug in sata_vsc where the lower bits of the
feature register were incorrectly placed in the HOB (high order bits)
portion of struct ata_taskfile.
Diffstat (limited to 'drivers/scsi/sata_vsc.c')
| -rw-r--r-- | drivers/scsi/sata_vsc.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c index 5af05fd..54273e0 100644 --- a/drivers/scsi/sata_vsc.c +++ b/drivers/scsi/sata_vsc.c @@ -153,16 +153,24 @@ static void vsc_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) { struct ata_ioports *ioaddr = &ap->ioaddr; - u16 nsect, lbal, lbam, lbah; + u16 nsect, lbal, lbam, lbah, feature; - nsect = tf->nsect = readw(ioaddr->nsect_addr); - lbal = tf->lbal = readw(ioaddr->lbal_addr); - lbam = tf->lbam = readw(ioaddr->lbam_addr); - lbah = tf->lbah = readw(ioaddr->lbah_addr); + tf->command = ata_check_status(ap); tf->device = readw(ioaddr->device_addr); + feature = readw(ioaddr->error_addr); + nsect = readw(ioaddr->nsect_addr); + lbal = readw(ioaddr->lbal_addr); + lbam = readw(ioaddr->lbam_addr); + lbah = readw(ioaddr->lbah_addr); + + tf->feature = feature; + tf->nsect = nsect; + tf->lbal = lbal; + tf->lbam = lbam; + tf->lbah = lbah; if (tf->flags & ATA_TFLAG_LBA48) { - tf->hob_feature = readb(ioaddr->error_addr); + tf->hob_feature = feature >> 8; tf->hob_nsect = nsect >> 8; tf->hob_lbal = lbal >> 8; tf->hob_lbam = lbam >> 8; |