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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2008-04-25 14:39:14 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2008-04-25 14:39:14 -0700
commitb7aa1f1603bea4fdec49a915712dea280cfd07e8 (patch)
treed0821e8110b96cd793384b79c470d951d9e7bb19 /drivers/pci/hotplug
parentef0ff95f136f0f2d035667af5d18b824609de320 (diff)
pciehp: Fix command write
Current implementation of pciehp_write_cmd() always enables command completed interrupt. But pciehp_write_cmd() is also used for clearing command completed interrupt enable bit. In this case, we must not set the command completed interrupt enable bit. To fix this bug, this patch add the check to see if caller wants to change command complete interrupt enable bit. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/pciehp_hpc.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 3efb1296290..49883c59756 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -301,7 +301,10 @@ static int pcie_write_cmd(struct controller *ctrl, u16 cmd, u16 mask)
}
slot_ctrl &= ~mask;
- slot_ctrl |= ((cmd & mask) | CMD_CMPL_INTR_ENABLE);
+ slot_ctrl |= (cmd & mask);
+ /* Don't enable command completed if caller is changing it. */
+ if (!(mask & CMD_CMPL_INTR_ENABLE))
+ slot_ctrl |= CMD_CMPL_INTR_ENABLE;
ctrl->cmd_busy = 1;
smp_mb();