libata sata_qstor nuke idle state
sata_qstor nuke idle state.
We're really only ever in one of two hardware states: packet, or mmio.
Get rid of unnecessary "qs_state_idle" state.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/sata_qstor.c b/drivers/ata/sata_qstor.c
index 6d43ba7..9d3128c 100644
--- a/drivers/ata/sata_qstor.c
+++ b/drivers/ata/sata_qstor.c
@@ -103,7 +103,7 @@
QS_DMA_BOUNDARY = ~0UL
};
-typedef enum { qs_state_idle, qs_state_pkt, qs_state_mmio } qs_state_t;
+typedef enum { qs_state_mmio, qs_state_pkt } qs_state_t;
struct qs_port_priv {
u8 *pkt;
@@ -219,7 +219,9 @@
static inline void qs_enter_reg_mode(struct ata_port *ap)
{
u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
+ struct qs_port_priv *pp = ap->private_data;
+ pp->state = qs_state_mmio;
writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
readb(chan + QS_CCT_CTR0); /* flush */
}
@@ -235,19 +237,12 @@
static void qs_phy_reset(struct ata_port *ap)
{
- struct qs_port_priv *pp = ap->private_data;
-
- pp->state = qs_state_idle;
qs_reset_channel_logic(ap);
sata_phy_reset(ap);
}
static void qs_eng_timeout(struct ata_port *ap)
{
- struct qs_port_priv *pp = ap->private_data;
-
- if (pp->state != qs_state_idle) /* healthy paranoia */
- pp->state = qs_state_mmio;
qs_reset_channel_logic(ap);
ata_eng_timeout(ap);
}
@@ -406,7 +401,6 @@
switch (sHST) {
case 0: /* successful CPB */
case 3: /* device error */
- pp->state = qs_state_idle;
qs_enter_reg_mode(qc->ap);
qc->err_mask |= ac_err_mask(sDST);
ata_qc_complete(qc);
@@ -445,7 +439,6 @@
ap->print_id, qc->tf.protocol, status);
/* complete taskfile transaction */
- pp->state = qs_state_idle;
qc->err_mask |= ac_err_mask(status);
ata_qc_complete(qc);
handled = 1;
@@ -501,7 +494,6 @@
rc = ata_port_start(ap);
if (rc)
return rc;
- qs_enter_reg_mode(ap);
pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
@@ -512,6 +504,7 @@
memset(pp->pkt, 0, QS_PKT_BYTES);
ap->private_data = pp;
+ qs_enter_reg_mode(ap);
addr = (u64)pp->pkt_dma;
writel((u32) addr, chan + QS_CCF_CPBA);
writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4);