[SCSI] mpt3sas: Updated the Hardware timing requirements
Hardware timing requirements is updated in order to comply with firmware
requirement.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 673a1b5..5dc280c 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -4090,11 +4090,15 @@
writel(host_diagnostic | MPI2_DIAG_RESET_ADAPTER,
&ioc->chip->HostDiagnostic);
- /* don't access any registers for 50 milliseconds */
- msleep(50);
+ /*This delay allows the chip PCIe hardware time to finish reset tasks*/
+ if (sleep_flag == CAN_SLEEP)
+ msleep(MPI2_HARD_RESET_PCIE_FIRST_READ_DELAY_MICRO_SEC/1000);
+ else
+ mdelay(MPI2_HARD_RESET_PCIE_FIRST_READ_DELAY_MICRO_SEC/1000);
- /* 300 second max wait */
- for (count = 0; count < 3000000 ; count++) {
+ /* Approximately 300 second max wait */
+ for (count = 0; count < (300000000 /
+ MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC); count++) {
host_diagnostic = readl(&ioc->chip->HostDiagnostic);
@@ -4103,11 +4107,13 @@
if (!(host_diagnostic & MPI2_DIAG_RESET_ADAPTER))
break;
- /* wait 1 msec */
+ /* Wait to pass the second read delay window */
if (sleep_flag == CAN_SLEEP)
- usleep_range(1000, 1500);
+ msleep(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC
+ / 1000);
else
- mdelay(1);
+ mdelay(MPI2_HARD_RESET_PCIE_SECOND_READ_DELAY_MICRO_SEC
+ / 1000);
}
if (host_diagnostic & MPI2_DIAG_HCB_MODE) {