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| author | Tejun Heo <htejun@gmail.com> | 2007-06-08 13:46:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-08 17:23:33 -0700 |
| commit | 51b94d2a5a90d4800e74d7348bcde098a28f4fb3 (patch) | |
| tree | 0d72d28e03d0c0136965e143c942ae79db8b1bdb /drivers/ata/sata_promise.c | |
| parent | 7b4dc1fdb868089ab60c09531d476284b71373e3 (diff) | |
| download | kernel_samsung_smdk4412-51b94d2a5a90d4800e74d7348bcde098a28f4fb3.tar.gz kernel_samsung_smdk4412-51b94d2a5a90d4800e74d7348bcde098a28f4fb3.tar.bz2 kernel_samsung_smdk4412-51b94d2a5a90d4800e74d7348bcde098a28f4fb3.zip | |
sata_promise: use TF interface for polling NODATA commands
sata_promise uses two different command modes - packet and TF. Packet mode
is intelligent low-overhead mode while TF is the same old taskfile
interface. As with other advanced interface (ahci/sil24),
ATA_TFLAG_POLLING has no effect in packet mode. However, PIO commands are
issued using TF interface in polling mode, so pdc_interrupt() considers
interrupts spurious if ATA_TFLAG_POLLING is set.
This is broken for polling NODATA commands because command is issued using
packet mode but the interrupt handler ignores it due to ATA_TFLAG_POLLING.
Fix pdc_qc_issue_prot() such that ATA/ATAPI NODATA commands are issued
using TF interface if ATA_TFLAG_POLLING is set.
This patch fixes detection failure introduced by polling SETXFERMODE.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/ata/sata_promise.c')
| -rw-r--r-- | drivers/ata/sata_promise.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c index 2b924a69b36..6dc0b011a6b 100644 --- a/drivers/ata/sata_promise.c +++ b/drivers/ata/sata_promise.c @@ -784,9 +784,12 @@ static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc) if (qc->dev->flags & ATA_DFLAG_CDB_INTR) break; /*FALLTHROUGH*/ + case ATA_PROT_NODATA: + if (qc->tf.flags & ATA_TFLAG_POLLING) + break; + /*FALLTHROUGH*/ case ATA_PROT_ATAPI_DMA: case ATA_PROT_DMA: - case ATA_PROT_NODATA: pdc_packet_start(qc); return 0; @@ -800,7 +803,7 @@ static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc) static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || - tf->protocol == ATA_PROT_NODATA); + tf->protocol == ATA_PROT_ATAPI_DMA); ata_tf_load(ap, tf); } @@ -808,7 +811,7 @@ static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON (tf->protocol == ATA_PROT_DMA || - tf->protocol == ATA_PROT_NODATA); + tf->protocol == ATA_PROT_ATAPI_DMA); ata_exec_command(ap, tf); } |