diff options
| author | Ed Lin <ed.lin@promise.com> | 2006-12-04 17:49:42 -0800 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-12-05 11:33:38 -0600 |
| commit | 76fbf96f82636c8cdc40485506c50c880fd45a56 (patch) | |
| tree | db77fbcf17433f041fabdcbbaa52336c0eccf0be | |
| parent | 94e9108b5ad8da9c02ebf5183b861f1717409555 (diff) | |
| download | linux-3.10-76fbf96f82636c8cdc40485506c50c880fd45a56.tar.gz linux-3.10-76fbf96f82636c8cdc40485506c50c880fd45a56.tar.bz2 linux-3.10-76fbf96f82636c8cdc40485506c50c880fd45a56.zip | |
[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>
| -rw-r--r-- | drivers/scsi/stex.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index bfd7983045b..7edbcc9bc9d 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -76,9 +76,10 @@ enum { MU_STATE_STARTED = 4, MU_STATE_RESETTING = 5, - MU_MAX_DELAY_TIME = 240000, + MU_MAX_DELAY = 120, MU_HANDSHAKE_SIGNATURE = 0x55aaaa55, MU_HANDSHAKE_SIGNATURE_HALF = 0x5a5a0000, + MU_HARD_RESET_WAIT = 30000, HMU_PARTNER_TYPE = 2, /* firmware returned values */ @@ -910,23 +911,22 @@ static int stex_handshake(struct st_hba *hba) struct handshake_frame *h; dma_addr_t status_phys; u32 data; - int i; + unsigned long before; if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) { writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL); readl(base + IDBL); - for (i = 0; readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE - && i < MU_MAX_DELAY_TIME; i++) { + before = jiffies; + while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) { + if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) { + printk(KERN_ERR DRV_NAME + "(%s): no handshake signature\n", + pci_name(hba->pdev)); + return -1; + } rmb(); msleep(1); } - - if (i == MU_MAX_DELAY_TIME) { - printk(KERN_ERR DRV_NAME - "(%s): no handshake signature\n", - pci_name(hba->pdev)); - return -1; - } } udelay(10); @@ -965,19 +965,18 @@ static int stex_handshake(struct st_hba *hba) readl(base + IDBL); /* flush */ udelay(10); - for (i = 0; readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE - && i < MU_MAX_DELAY_TIME; i++) { + before = jiffies; + while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) { + if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) { + printk(KERN_ERR DRV_NAME + "(%s): no signature after handshake frame\n", + pci_name(hba->pdev)); + return -1; + } rmb(); msleep(1); } - if (i == MU_MAX_DELAY_TIME) { - printk(KERN_ERR DRV_NAME - "(%s): no signature after handshake frame\n", - pci_name(hba->pdev)); - return -1; - } - writel(0, base + IMR0); readl(base + IMR0); writel(0, base + OMR0); @@ -1059,7 +1058,7 @@ static void stex_hard_reset(struct st_hba *hba) pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET; 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); if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER)) break; |