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authorMark M. Hoffman <mhoffman@lightlink.com>2007-01-08 22:11:29 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2007-01-09 09:07:52 -0800
commit2f5c33b3180169f3eafb698b66686962d637fb0e (patch)
tree6272503c1072c41181a1e00301508d3f845816ef
parentefa06708fe77190f31bed5c3cb5da49e211240f5 (diff)
[PATCH] i2c/pci: fix sis96x smbus quirk once and for all
The sis96x SMBus PCI device depends on two different quirks to run in a specific order. Apart from being fragile, this was found to actually break on (at least) recent FC4, FC5, and FC6 kernels. This patch fixes the quirks so that they work without relying on the compiler and/or linker to put them in any specific order. http://lists.lm-sensors.org/pipermail/lm-sensors/2006-April/015962.html https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=189719 I tested this patch. Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Cc: Andrew Morton <akpm@osdl.org> Cc: Adrian Bunk <bunk@stusta.de> Cc: Greg K-H <greg@kroah.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/pci/quirks.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 8f0322d6f3b..0535efc4f18 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1117,10 +1117,11 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1, asus_h
static void quirk_sis_96x_smbus(struct pci_dev *dev)
{
u8 val = 0;
- printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
- pci_read_config_byte(dev, 0x77, &val);
- pci_write_config_byte(dev, 0x77, val & ~0x10);
pci_read_config_byte(dev, 0x77, &val);
+ if (val & 0x10) {
+ printk(KERN_INFO "Enabling SiS 96x SMBus.\n");
+ pci_write_config_byte(dev, 0x77, val & ~0x10);
+ }
}
/*
@@ -1152,11 +1153,12 @@ static void quirk_sis_503(struct pci_dev *dev)
printk(KERN_WARNING "Uncovering SIS%x that hid as a SIS503 (compatible=%d)\n", devid, sis_96x_compatible);
/*
- * Ok, it now shows up as a 96x.. The 96x quirks are after
- * the 503 quirk in the quirk table, so they'll automatically
- * run and enable things like the SMBus device
+ * Ok, it now shows up as a 96x.. run the 96x quirk by
+ * hand in case it has already been processed.
+ * (depends on link order, which is apparently not guaranteed)
*/
dev->device = devid;
+ quirk_sis_96x_smbus(dev);
}
static void __init quirk_sis_96x_compatible(struct pci_dev *dev)