From 06f579dee5dd75c2aaf8fe83d034b5470eeee2f4 Mon Sep 17 00:00:00 2001 From: "Yang, Bo" Date: Sun, 10 Aug 2008 12:42:37 -0700 Subject: [PATCH] [SCSI] megaraid_sas: add readl to force PCI posting flush MegaRAID SAS Driver get unexpected Interrupt. Add the dummy readl to force PCI flush will fix this issue. Signed-off-by: Bo Yang Signed-off-by: Andrew Morton Cc: Stable Tree Signed-off-by: James Bottomley --- drivers/scsi/megaraid/megaraid_sas.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c index fc7ac158476..d7b99843ca3 100644 --- a/drivers/scsi/megaraid/megaraid_sas.c +++ b/drivers/scsi/megaraid/megaraid_sas.c @@ -198,6 +198,9 @@ megasas_clear_intr_xscale(struct megasas_register_set __iomem * regs) */ writel(status, ®s->outbound_intr_status); + /* Dummy readl to force pci flush */ + readl(®s->outbound_intr_status); + return 0; } @@ -293,6 +296,9 @@ megasas_clear_intr_ppc(struct megasas_register_set __iomem * regs) */ writel(status, ®s->outbound_doorbell_clear); + /* Dummy readl to force pci flush */ + readl(®s->outbound_doorbell_clear); + return 0; } /** -- 2.41.1