pdc_adma has interface similar to SFF but has its own DMA interface.
It currently implements noop bmdma ops to avoid crashing
ata_bmdma_error_handler() which BTW actually is EH for SFF drivers.
This patch makes ata_bmdma_error_handler() dereference bmdma ops iff
bmdma_addr is initialized as done in ata_bmdma_post_internal_cmd.
This change allows pdc_adma to standardize ops and use SFF
error_handler and post_internal_cmd.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
Cc: Mark Lord <liml@xxxxxx>
---
This patch series in on top of #cleanup-sht-ops (ed75ba53) and not for
#upstream-fixes. Tested with pdc_adma controllers Mark sent me. :-)
drivers/ata/libata-sff.c | 3 ++-
drivers/ata/pdc_adma.c | 16 ++--------------
2 files changed, 4 insertions(+), 15 deletions(-)
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 2a229a1..0e30c11 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -424,7 +424,8 @@ void ata_bmdma_error_handler(struct ata_port *ap)
ap->hsm_task_state = HSM_ST_IDLE;
- if (qc && (qc->tf.protocol == ATA_PROT_DMA ||
+ if (ap->ioaddr.bmdma_addr &&
+ qc && (qc->tf.protocol == ATA_PROT_DMA ||
qc->tf.protocol == ATAPI_PROT_DMA)) {
u8 host_stat;
diff --git a/drivers/ata/pdc_adma.c b/drivers/ata/pdc_adma.c
index 5ed065d..577a0e5 100644
--- a/drivers/ata/pdc_adma.c
+++ b/drivers/ata/pdc_adma.c
@@ -136,8 +136,6 @@ static void adma_port_stop(struct ata_port *ap);
static void adma_qc_prep(struct ata_queued_cmd *qc);
static unsigned int adma_qc_issue(struct ata_queued_cmd *qc);
static int adma_check_atapi_dma(struct ata_queued_cmd *qc);
-static void adma_bmdma_stop(struct ata_queued_cmd *qc);
-static u8 adma_bmdma_status(struct ata_port *ap);
static void adma_freeze(struct ata_port *ap);
static void adma_thaw(struct ata_port *ap);
static int adma_prereset(struct ata_link *link, unsigned long deadline);
@@ -158,8 +156,6 @@ static struct ata_port_operations adma_ata_ops = {
.exec_command = ata_exec_command,
.data_xfer = ata_data_xfer,
.check_atapi_dma = adma_check_atapi_dma,
- .bmdma_stop = adma_bmdma_stop,
- .bmdma_status = adma_bmdma_status,
.qc_prep = adma_qc_prep,
.qc_issue = adma_qc_issue,
.irq_on = ata_irq_on,
@@ -168,6 +164,8 @@ static struct ata_port_operations adma_ata_ops = {
.thaw = adma_thaw,
.prereset = adma_prereset,
.softreset = ata_std_softreset,
+ .error_handler = ata_bmdma_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
.port_start = adma_port_start,
.port_stop = adma_port_stop,
@@ -204,16 +202,6 @@ static int adma_check_atapi_dma(struct ata_queued_cmd *qc)
return 1; /* ATAPI DMA not yet supported */
}
-static void adma_bmdma_stop(struct ata_queued_cmd *qc)
-{
- /* nothing */
-}
-
-static u8 adma_bmdma_status(struct ata_port *ap)
-{
- return 0;
-}
-
static void adma_reset_engine(struct ata_port *ap)
{
void __iomem *chan = ADMA_PORT_REGS(ap);
--
1.5.2.4
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