ahci: use deadline instead of fixed timeout for 1st FIS for SRST
authorTejun Heo <htejun@gmail.com>
Mon, 16 Jul 2007 05:29:38 +0000 (14:29 +0900)
committerJeff Garzik <jeff@garzik.org>
Fri, 20 Jul 2007 12:02:10 +0000 (08:02 -0400)
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>
drivers/ata/ahci.c

index 61c5b6e68de41bb2c1e9c20a5e11b055129e6f1f..0451600bdcc6535618b8005d5627b278052efe52 100644 (file)
@@ -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";