shpchp: remove unnecessary cmd_busy member from struct controller

This patch removes unnecessary cmd_busy member from struct
controller. Read command status register instead of using cmd_busy.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 1 insertions, 5 deletions

diff --git a/drivers/pci/hotplug/shpchp.h b/drivers/pci/hotplug/shpchp.h
index c7103ac5cd06..7e7d490622e1 100644
--- a/drivers/pci/hotplug/shpchp.h
+++ b/drivers/pci/hotplug/shpchp.h
@@ -103,7 +103,6 @@ struct controller {
         u32 cap_offset;
         unsigned long mmio_base;
         unsigned long mmio_size;
-        volatile int cmd_busy;
 };
 
 
diff --git a/drivers/pci/hotplug/shpchp_hpc.c b/drivers/pci/hotplug/shpchp_hpc.c
index 4826dd158deb..bbe450f098e6 100644
--- a/drivers/pci/hotplug/shpchp_hpc.c
+++ b/drivers/pci/hotplug/shpchp_hpc.c
@@ -339,7 +339,7 @@ static inline int shpc_wait_cmd(struct controller *ctrl)
                 rc = shpc_poll_ctrl_busy(ctrl);
         else
                 rc = wait_event_interruptible_timeout(ctrl->queue,
-                                                !ctrl->cmd_busy, timeout);
+                                                !is_ctrl_busy(ctrl), timeout);
         if (!rc && is_ctrl_busy(ctrl)) {
                 retval = -EIO;
                 err("Command not completed in 1000 msec\n");
@@ -347,7 +347,6 @@ static inline int shpc_wait_cmd(struct controller *ctrl)
                 retval = -EINTR;
                 info("Command was interrupted by a signal\n");
         }
-        ctrl->cmd_busy = 0;
 
         return retval;
 }
@@ -378,7 +377,6 @@ static int shpc_write_cmd(struct slot *slot, u8 t_slot, u8 cmd)
         /* To make sure the Controller Busy bit is 0 before we send out the
          * command. 
          */
-        slot->ctrl->cmd_busy = 1;
         shpc_writew(ctrl, CMD, temp_word);
 
         /*
@@ -928,7 +926,6 @@ static irqreturn_t shpc_isr(int irq, void *dev_id)
                 serr_int &= ~SERR_INTR_RSVDZ_MASK;
                 shpc_writel(ctrl, SERR_INTR_ENABLE, serr_int);
 
-                ctrl->cmd_busy = 0;
                 wake_up_interruptible(&ctrl->queue);
         }