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ahci: use deadline instead of fixed timeout for 1st FIS for SRST 

Use deadline instead of fixed timeout for 1st FIS for SRST to improve
robustness of SRST.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-07-16 14:29:38 +09:00 committed by Jeff Garzik
parent 9977126c4b
commit 2cbb79ebbd
1 changed files with 7 additions and 1 deletions
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8
drivers/ata/ahci.c
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@ -976,6 +976,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
void __iomem *port_mmio = ahci_port_base(ap);
const u32 cmd_fis_len = 5; /* five dwords */
const char *reason = NULL;
unsigned long now, msecs;
struct ata_taskfile tf;
u32 tmp;
u8 *fis;
@ -1016,6 +1017,11 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
fis = pp->cmd_tbl;
/* issue the first D2H Register FIS */
msecs = 0;
now = jiffies;
if (time_after(now, deadline))
msecs = jiffies_to_msecs(deadline - now);
ahci_fill_cmd_slot(pp, 0,
cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
@ -1024,7 +1030,7 @@ static int ahci_softreset(struct ata_port *ap, unsigned int *class,
writel(1, port_mmio + PORT_CMD_ISSUE);
tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, msecs);
if (tmp & 0x1) {
rc = -EIO;
reason = "1st FIS failed";