Fix for bug #6395:
Fail to resume on Tecra M2 with ADM1032 and Intel 82801DBM
The BIOS of the Tecra M2 doesn't like it when it has to reboot or
resume after the i2c-i801 driver has left the SMBus in PEC mode.
I have a more complete fix for 2.6.17 but the simple approach of
leaving the SMBus in non-PEC mode after every transaction should do
for -stable. That's what the i2c-i801 driver was doing up to 2.6.15
(inclusive).
Signed-off-by: Jean Delvare <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/i2c/busses/i2c-i801.c | 5 +++++
1 file changed, 5 insertions(+)
--- linux-2.6.16.9.orig/drivers/i2c/busses/i2c-i801.c
+++ linux-2.6.16.9/drivers/i2c/busses/i2c-i801.c
@@ -478,6 +478,11 @@ static s32 i801_access(struct i2c_adapte
ret = i801_transaction();
}
+ /* Some BIOSes don't like it when PEC is enabled at reboot or resume
+ time, so we forcibly disable it after every transaction. */
+ if (hwpec)
+ outb_p(0, SMBAUXCTL);
+
if(block)
return ret;
if(ret)
--
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
