[SCSI] csiostor: Use pcie_capability_clear_and_set_word() to simplify code

pci_is_pcie() and pcie_capability_clear_and_set_word() make it trivial
to set the PCIe Completion Timeout, so just fold the
csio_set_pcie_completion_timeout() function into its caller.

[bhelgaas: changelog, fold csio_set_pcie_completion_timeout() into caller]
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Naresh Kumar Inna <naresh@chelsio.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jesper Juhl <jj@chaosbits.net>

2 files changed, 6 insertions, 19 deletions

diff --git a/drivers/scsi/csiostor/csio_hw.c b/drivers/scsi/csiostor/csio_hw.c
index 0eb35b9b3784..0eaec4748957 100644
--- a/drivers/scsi/csiostor/csio_hw.c
+++ b/drivers/scsi/csiostor/csio_hw.c
@@ -852,22 +852,6 @@ csio_hw_get_flash_params(struct csio_hw *hw)
         return 0;
 }
 
-static void
-csio_set_pcie_completion_timeout(struct csio_hw *hw, u8 range)
-{
-        uint16_t val;
-        int pcie_cap;
-
-        if (!csio_pci_capability(hw->pdev, PCI_CAP_ID_EXP, &pcie_cap)) {
-                pci_read_config_word(hw->pdev,
-                                     pcie_cap + PCI_EXP_DEVCTL2, &val);
-                val &= 0xfff0;
-                val |= range ;
-                pci_write_config_word(hw->pdev,
-                                      pcie_cap + PCI_EXP_DEVCTL2, val);
-        }
-}
-
 /*****************************************************************************/
 /* HW State machine assists                                                  */
 /*****************************************************************************/
@@ -2069,8 +2053,10 @@ csio_hw_configure(struct csio_hw *hw)
                 goto out;
         }
 
-        /* Set pci completion timeout value to 4 seconds. */
-        csio_set_pcie_completion_timeout(hw, 0xd);
+        /* Set PCIe completion timeout to 4 seconds */
+        if (pci_is_pcie(hw->pdev))
+                pcie_capability_clear_and_set_word(hw->pdev, PCI_EXP_DEVCTL2,
+                                PCI_EXP_DEVCTL2_COMP_TIMEOUT, 0xd);
 
         hw->chip_ops->chip_set_mem_win(hw, MEMWIN_CSIOSTOR);
 
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index baa7852468ef..1a38377a0032 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -558,7 +558,8 @@
 #define  PCI_EXP_DEVCAP2_OBFF_MSG       0x00040000 /* New message signaling */
 #define  PCI_EXP_DEVCAP2_OBFF_WAKE      0x00080000 /* Re-use WAKE# for OBFF */
 #define PCI_EXP_DEVCTL2         40      /* Device Control 2 */
-#define  PCI_EXP_DEVCTL2_ARI            0x20    /* Alternative Routing-ID */
+#define  PCI_EXP_DEVCTL2_COMP_TIMEOUT   0x000f  /* Completion Timeout Value */
+#define  PCI_EXP_DEVCTL2_ARI            0x0020  /* Alternative Routing-ID */
 #define  PCI_EXP_DEVCTL2_IDO_REQ_EN     0x0100  /* Allow IDO for requests */
 #define  PCI_EXP_DEVCTL2_IDO_CMP_EN     0x0200  /* Allow IDO for completions */
 #define  PCI_EXP_DEVCTL2_LTR_EN         0x0400  /* Enable LTR mechanism */