[SCSI] stex: extend hard reset wait time

During hard bus reset of st_shasta controllers, 1 ms is not enough for
16-port controllers, although it's good for 8-port controllers.  Extend the
wait time to 100  ms to allow bus resets finish successfully.

Signed-off-by: Ed Lin <ed.lin@promise.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 96dcbac9545e..81dd3b740daf 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -1041,7 +1041,12 @@ static void stex_hard_reset(struct st_hba *hba)
         pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &pci_bctl);
         pci_bctl |= PCI_BRIDGE_CTL_BUS_RESET;
         pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
-        msleep(1);
+
+        /*
+         * 1 ms may be enough for 8-port controllers. But 16-port controllers
+         * require more time to finish bus reset. Use 100 ms here for safety
+         */
+        msleep(100);
         pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
         pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);