sata_fsl,mv,nv: prepare for NCQ command completion update
Make the following changes to prepare for NCQ command completion
update. Changes made by this patch don't cause any functional
difference.
* sata_fsl_host_intr(): rename the local variable qc_active to
done_mask as that's what it is.
* mv_process_crpb_response(): restructure if clause for easier update.
* nv_adma_interrupt(): drop unnecessary error variable.
* nv_swncq_sdbfis(): drop unnecessary nr_done and return 0 on success.
Typo fix.
* nv_swncq_dmafis(): drop unused return value and return void.
* nv_swncq_host_interrupt(): drop unnecessary return value handling.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ashish Kalra <ashish.kalra@freescale.com>
Cc: Saeed Bishara <saeed@marvell.com>
Cc: Mark Lord <liml@rtr.ca>
Cc: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 2116113..cb89ef8 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1018,7 +1018,7 @@
NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_CMD_COMPLETE)) {
u32 check_commands = notifier_clears[i];
- int pos, error = 0;
+ int pos, rc;
if (status & NV_ADMA_STAT_CPBERR) {
/* check all active commands */
@@ -1030,10 +1030,12 @@
}
/* check CPBs for completed commands */
- while ((pos = ffs(check_commands)) && !error) {
+ while ((pos = ffs(check_commands))) {
pos--;
- error = nv_adma_check_cpb(ap, pos,
+ rc = nv_adma_check_cpb(ap, pos,
notifier_error & (1 << pos));
+ if (unlikely(rc))
+ check_commands = 0;
check_commands &= ~(1 << pos);
}
}
@@ -2129,7 +2131,6 @@
struct nv_swncq_port_priv *pp = ap->private_data;
struct ata_eh_info *ehi = &ap->link.eh_info;
u32 sactive;
- int nr_done = 0;
u32 done_mask;
int i;
u8 host_stat;
@@ -2170,22 +2171,21 @@
pp->dhfis_bits &= ~(1 << i);
pp->dmafis_bits &= ~(1 << i);
pp->sdbfis_bits |= (1 << i);
- nr_done++;
}
}
if (!ap->qc_active) {
DPRINTK("over\n");
nv_swncq_pp_reinit(ap);
- return nr_done;
+ return 0;
}
if (pp->qc_active & pp->dhfis_bits)
- return nr_done;
+ return 0;
if ((pp->ncq_flags & ncq_saw_backout) ||
(pp->qc_active ^ pp->dhfis_bits))
- /* if the controller cann't get a device to host register FIS,
+ /* if the controller can't get a device to host register FIS,
* The driver needs to reissue the new command.
*/
lack_dhfis = 1;
@@ -2202,7 +2202,7 @@
if (lack_dhfis) {
qc = ata_qc_from_tag(ap, pp->last_issue_tag);
nv_swncq_issue_atacmd(ap, qc);
- return nr_done;
+ return 0;
}
if (pp->defer_queue.defer_bits) {
@@ -2212,7 +2212,7 @@
nv_swncq_issue_atacmd(ap, qc);
}
- return nr_done;
+ return 0;
}
static inline u32 nv_swncq_tag(struct ata_port *ap)
@@ -2224,7 +2224,7 @@
return (tag & 0x1f);
}
-static int nv_swncq_dmafis(struct ata_port *ap)
+static void nv_swncq_dmafis(struct ata_port *ap)
{
struct ata_queued_cmd *qc;
unsigned int rw;
@@ -2239,7 +2239,7 @@
qc = ata_qc_from_tag(ap, tag);
if (unlikely(!qc))
- return 0;
+ return;
rw = qc->tf.flags & ATA_TFLAG_WRITE;
@@ -2254,8 +2254,6 @@
dmactl |= ATA_DMA_WR;
iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
- return 1;
}
static void nv_swncq_host_interrupt(struct ata_port *ap, u16 fis)
@@ -2265,7 +2263,6 @@
struct ata_eh_info *ehi = &ap->link.eh_info;
u32 serror;
u8 ata_stat;
- int rc = 0;
ata_stat = ap->ops->sff_check_status(ap);
nv_swncq_irq_clear(ap, fis);
@@ -2310,8 +2307,7 @@
"dhfis 0x%X dmafis 0x%X sactive 0x%X\n",
ap->print_id, pp->qc_active, pp->dhfis_bits,
pp->dmafis_bits, readl(pp->sactive_block));
- rc = nv_swncq_sdbfis(ap);
- if (rc < 0)
+ if (nv_swncq_sdbfis(ap) < 0)
goto irq_error;
}
@@ -2348,7 +2344,7 @@
*/
pp->dmafis_bits |= (0x1 << nv_swncq_tag(ap));
pp->ncq_flags |= ncq_saw_dmas;
- rc = nv_swncq_dmafis(ap);
+ nv_swncq_dmafis(ap);
}
irq_exit: