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[SCSI] stex: change wait loop code 

The original wait loop may be much longer than intended time.
Use more accurate timer_after for it. Also adjust wait value to
avoid unnecessary long waiting.

Signed-off-by: Ed Lin <ed.lin@promise.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Ed Lin 2006-12-04 17:49:42 -08:00 committed by James Bottomley
parent 94e9108b5a
commit 76fbf96f82
1 changed files with 20 additions and 21 deletions
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33
drivers/scsi/stex.c
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@ -76,9 +76,10 @@ enum {
MU_STATE_STARTED = 4, MU_STATE_STARTED = 4,
MU_STATE_RESETTING = 5, MU_STATE_RESETTING = 5,
MU_MAX_DELAY_TIME = 240000, MU_MAX_DELAY = 120,
MU_HANDSHAKE_SIGNATURE = 0x55aaaa55, MU_HANDSHAKE_SIGNATURE = 0x55aaaa55,
MU_HANDSHAKE_SIGNATURE_HALF = 0x5a5a0000, MU_HANDSHAKE_SIGNATURE_HALF = 0x5a5a0000,
MU_HARD_RESET_WAIT = 30000,
HMU_PARTNER_TYPE = 2, HMU_PARTNER_TYPE = 2,
/* firmware returned values */ /* firmware returned values */
@ -910,23 +911,22 @@ static int stex_handshake(struct st_hba *hba)
struct handshake_frame *h; struct handshake_frame *h;
dma_addr_t status_phys; dma_addr_t status_phys;
u32 data; u32 data;
int i; unsigned long before;
if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) { if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL); writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
readl(base + IDBL); readl(base + IDBL);
for (i = 0; readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE before = jiffies;
&& i < MU_MAX_DELAY_TIME; i++) { while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
rmb(); if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
msleep(1);
}
if (i == MU_MAX_DELAY_TIME) {
printk(KERN_ERR DRV_NAME printk(KERN_ERR DRV_NAME
"(%s): no handshake signature\n", "(%s): no handshake signature\n",
pci_name(hba->pdev)); pci_name(hba->pdev));
return -1; return -1;
} }
rmb();
msleep(1);
}
} }
udelay(10); udelay(10);
@ -965,18 +965,17 @@ static int stex_handshake(struct st_hba *hba)
readl(base + IDBL); /* flush */ readl(base + IDBL); /* flush */
udelay(10); udelay(10);
for (i = 0; readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE before = jiffies;
&& i < MU_MAX_DELAY_TIME; i++) { while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
rmb(); if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
msleep(1);
}
if (i == MU_MAX_DELAY_TIME) {
printk(KERN_ERR DRV_NAME printk(KERN_ERR DRV_NAME
"(%s): no signature after handshake frame\n", "(%s): no signature after handshake frame\n",
pci_name(hba->pdev)); pci_name(hba->pdev));
return -1; return -1;
} }
rmb();
msleep(1);
}
writel(0, base + IMR0); writel(0, base + IMR0);
readl(base + IMR0); readl(base + IMR0);
@ -1059,7 +1058,7 @@ static void stex_hard_reset(struct st_hba *hba)
pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET; pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl); pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
for (i = 0; i < MU_MAX_DELAY_TIME; i++) { for (i = 0; i < MU_HARD_RESET_WAIT; i++) {
pci_read_config_word(hba->pdev, PCI_COMMAND, &pci_cmd); pci_read_config_word(hba->pdev, PCI_COMMAND, &pci_cmd);
if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER)) if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER))
break; break;