[PATCH] shpchp: fix improper write to Command Completion Detect bit

Current SHPCHP driver writes a '0' to the Command Completion Detect
bit to clear the Command Complete Interrupt Pending. But according to
the SHPC spec (See 4.7.3.1 System Interrupts), SHPCHP driver must
write '1'. This patch fixes this bug.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index d82987f075b2..f25e11645071 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -1058,11 +1058,11 @@ static irqreturn_t shpc_isr(int IRQ, void *dev_id, struct pt_regs *regs)
         if (intr_loc & 0x0001) {
                 /* 
                  * Command Complete Interrupt Pending 
-                 * RO only - clear by writing 0 to the Command Completion
+                 * RO only - clear by writing 1 to the Command Completion
                  * Detect bit in Controller SERR-INT register
                  */
                 temp_dword = readl(php_ctlr->creg + SERR_INTR_ENABLE);
-                temp_dword &= 0xfffeffff;
+                temp_dword &= 0xfffdffff;
                 writel(temp_dword, php_ctlr->creg + SERR_INTR_ENABLE);
                 wake_up_interruptible(&ctrl->queue);
         }