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>

2 files changed, 2 insertions, 4 deletions

diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h
index aaac6e5b4767..a0420bc63f0b 100644
--- a/sound/pci/ca0106/ca0106.h
+++ b/sound/pci/ca0106/ca0106.h
@@ -590,7 +590,6 @@ struct snd_ca0106 {
         struct resource *res_port;
         int irq;
 
-        unsigned char revision;         /* chip revision */
         unsigned int serial;            /* serial number */
         unsigned short model;           /* subsystem id */
 
diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index 48f3f17c5170..9fd7b8a5b75e 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -1293,13 +1293,12 @@ static int __devinit snd_ca0106_create(int dev, struct snd_card *card,
         }
 
         pci_set_master(pci);
-        /* read revision & serial */
-        pci_read_config_byte(pci, PCI_REVISION_ID, &chip->revision);
+        /* read serial */
         pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
         pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
 #if 1
         printk(KERN_INFO "snd-ca0106: Model %04x Rev %08x Serial %08x\n", chip->model,
-               chip->revision, chip->serial);
+               pci->revision, chip->serial);
 #endif
         strcpy(card->driver, "CA0106");
         strcpy(card->shortname, "CA0106");