[PATCH] ppc64 iSeries: remove IoRetry from iSeries_Device_Node

The IoRetry member of iSeries_Devide_Node is really only used locally, so
remove it and replace it with a local variable.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 18 insertions, 17 deletions

diff --git a/arch/ppc64/kernel/iSeries_pci.c b/arch/ppc64/kernel/iSeries_pci.c
index 1313a7a2f00..0a28b6ca65d 100644
--- a/arch/ppc64/kernel/iSeries_pci.c
+++ b/arch/ppc64/kernel/iSeries_pci.c
@@ -225,7 +225,6 @@ static struct iSeries_Device_Node *build_device_node(HvBusNumber Bus,
         node->DsaAddr.Dsa.deviceId = 0x10;
         node->AgentId = AgentId;
         node->DevFn = PCI_DEVFN(ISERIES_ENCODE_DEVICE(AgentId), Function);
-        node->IoRetry = 0;
         iSeries_Get_Location_Code(node);
         return node;
 }
@@ -658,38 +657,34 @@ static struct pci_ops iSeries_pci_ops = {
  * Check Return Code
  * -> On Failure, print and log information.
  *    Increment Retry Count, if exceeds max, panic partition.
- * -> If in retry, print and log success 
  *
  * PCI: Device 23.90 ReadL I/O Error( 0): 0x1234
  * PCI: Device 23.90 ReadL Retry( 1)
  * PCI: Device 23.90 ReadL Retry Successful(1)
  */
 static int CheckReturnCode(char *TextHdr, struct iSeries_Device_Node *DevNode,
-                u64 ret)
+                int *retry, u64 ret)
 {
         if (ret != 0)  {
                 ++Pci_Error_Count;
-                ++DevNode->IoRetry;
+                (*retry)++;
                 printk("PCI: %s: Device 0x%04X:%02X  I/O Error(%2d): 0x%04X\n",
                                 TextHdr, DevNode->DsaAddr.Dsa.busNumber, DevNode->DevFn,
-                                DevNode->IoRetry, (int)ret);
+                                *retry, (int)ret);
                 /*
                  * Bump the retry and check for retry count exceeded.
                  * If, Exceeded, panic the system.
                  */
-                if ((DevNode->IoRetry > Pci_Retry_Max) &&
+                if (((*retry) > Pci_Retry_Max) &&
                                 (Pci_Error_Flag > 0)) {
                         mf_display_src(0xB6000103);
-                        panic_timeout = 0; 
+                        panic_timeout = 0;
                         panic("PCI: Hardware I/O Error, SRC B6000103, "
                                         "Automatic Reboot Disabled.\n");
                 }
                 return -1;      /* Retry Try */
         }
-        /* If retry was in progress, log success and rest retry count */
-        if (DevNode->IoRetry > 0)
-                DevNode->IoRetry = 0;
-        return 0; 
+        return 0;
 }
 
 /*
@@ -735,6 +730,7 @@ u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         struct HvCallPci_LoadReturn ret;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -754,7 +750,7 @@ u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress)
         do {
                 ++Pci_Io_Read_Count;
                 HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0);
-        } while (CheckReturnCode("RDB", DevNode, ret.rc) != 0);
+        } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0);
 
         return (u8)ret.value;
 }
@@ -764,6 +760,7 @@ u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         struct HvCallPci_LoadReturn ret;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -784,7 +781,7 @@ u16 iSeries_Read_Word(const volatile void __iomem *IoAddress)
                 ++Pci_Io_Read_Count;
                 HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa,
                                 BarOffset, 0);
-        } while (CheckReturnCode("RDW", DevNode, ret.rc) != 0);
+        } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0);
 
         return swab16((u16)ret.value);
 }
@@ -794,6 +791,7 @@ u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         struct HvCallPci_LoadReturn ret;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -814,7 +812,7 @@ u32 iSeries_Read_Long(const volatile void __iomem *IoAddress)
                 ++Pci_Io_Read_Count;
                 HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa,
                                 BarOffset, 0);
-        } while (CheckReturnCode("RDL", DevNode, ret.rc) != 0);
+        } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0);
 
         return swab32((u32)ret.value);
 }
@@ -831,6 +829,7 @@ void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         u64 rc;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -850,7 +849,7 @@ void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress)
         do {
                 ++Pci_Io_Write_Count;
                 rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0);
-        } while (CheckReturnCode("WWB", DevNode, rc) != 0);
+        } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0);
 }
 EXPORT_SYMBOL(iSeries_Write_Byte);
 
@@ -858,6 +857,7 @@ void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         u64 rc;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -877,7 +877,7 @@ void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress)
         do {
                 ++Pci_Io_Write_Count;
                 rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0);
-        } while (CheckReturnCode("WWW", DevNode, rc) != 0);
+        } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0);
 }
 EXPORT_SYMBOL(iSeries_Write_Word);
 
@@ -885,6 +885,7 @@ void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
 {
         u64 BarOffset;
         u64 dsa;
+        int retry = 0;
         u64 rc;
         struct iSeries_Device_Node *DevNode =
                 xlate_iomm_address(IoAddress, &dsa, &BarOffset);
@@ -904,6 +905,6 @@ void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress)
         do {
                 ++Pci_Io_Write_Count;
                 rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0);
-        } while (CheckReturnCode("WWL", DevNode, rc) != 0);
+        } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0);
 }
 EXPORT_SYMBOL(iSeries_Write_Long);