PCI: Change all drivers to use pci_device->revision

Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.

This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.

In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.

Compile tested with make all{yes,mod}config on x86_64 and i386.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/atm/iphase.c b/drivers/atm/iphase.c
index bb7ef570514c..a3b605a0ca17 100644
--- a/drivers/atm/iphase.c
+++ b/drivers/atm/iphase.c
@@ -2290,7 +2290,6 @@ static int __devinit ia_init(struct atm_dev *dev)
         unsigned long real_base;
         void __iomem *base;
         unsigned short command;  
-        unsigned char revision;  
         int error, i; 
           
         /* The device has been identified and registered. Now we read   
@@ -2305,16 +2304,14 @@ static int __devinit ia_init(struct atm_dev *dev)
         real_base = pci_resource_start (iadev->pci, 0);
         iadev->irq = iadev->pci->irq;
                   
-        if ((error = pci_read_config_word(iadev->pci, PCI_COMMAND,&command))   
-                    || (error = pci_read_config_byte(iadev->pci,   
-                                PCI_REVISION_ID,&revision)))   
-        {  
+        error = pci_read_config_word(iadev->pci, PCI_COMMAND, &command);
+        if (error) {
                 printk(KERN_ERR DEV_LABEL "(itf %d): init error 0x%x\n",  
                                 dev->number,error);  
                 return -EINVAL;  
         }  
         IF_INIT(printk(DEV_LABEL "(itf %d): rev.%d,realbase=0x%lx,irq=%d\n",  
-                        dev->number, revision, real_base, iadev->irq);)  
+                        dev->number, iadev->pci->revision, real_base, iadev->irq);)
           
         /* find mapping size of board */  
           
@@ -2353,7 +2350,7 @@ static int __devinit ia_init(struct atm_dev *dev)
                 return error;  
         }  
         IF_INIT(printk(DEV_LABEL " (itf %d): rev.%d,base=%p,irq=%d\n",  
-                        dev->number, revision, base, iadev->irq);)  
+                        dev->number, iadev->pci->revision, base, iadev->irq);)
           
         /* filling the iphase dev structure */  
         iadev->mem = iadev->pci_map_size /2;