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/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index dbc805c33fc4..4a9b59ad8ab1 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -1511,7 +1511,6 @@ int __devinit snd_emu10k1_create(struct snd_card *card,
         struct snd_emu10k1 *emu;
         int idx, err;
         int is_audigy;
-        unsigned char revision;
         unsigned int silent_page;
         const struct snd_emu_chip_details *c;
         static struct snd_device_ops ops = {
@@ -1543,8 +1542,7 @@ int __devinit snd_emu10k1_create(struct snd_card *card,
         emu->synth = NULL;
         emu->get_synth_voice = NULL;
         /* read revision & serial */
-        pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
-        emu->revision = revision;
+        emu->revision = pci->revision;
         pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &emu->serial);
         pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &emu->model);
         snd_printdd("vendor=0x%x, device=0x%x, subsystem_vendor_id=0x%x, subsystem_id=0x%x\n",pci->vendor, pci->device, emu->serial, emu->model);
diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index bb0fec7f7e1b..e4af7a9b808c 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -942,7 +942,7 @@ static int __devinit snd_emu10k1x_create(struct snd_card *card,
 
         pci_set_master(pci);
         /* read revision & serial */
-        pci_read_config_byte(pci, PCI_REVISION_ID, &chip->revision);
+        chip->revision = pci->revision;
         pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
         pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
         snd_printk(KERN_INFO "Model %04x Rev %08x Serial %08x\n", chip->model,