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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-01-02 13:04:44 +1100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-02 08:38:37 -0800
commitf12f4d90308a22396ac87f6c3a7b2620589614c3 (patch)
treebd086b38c2a3d3de8d765f52d0bbaae7035bab08
parent557962a926c62a9c4bd79d6b36df873d4f8c51ef (diff)
downloadlinux-linaro-stable-f12f4d90308a22396ac87f6c3a7b2620589614c3.tar.gz
[PATCH] powerpc: more g5 overtemp problem fix
Some G5s still occasionally experience shutdowns due to overtemp conditions despite the recent fix. After analyzing logs from such machines, it appears that the overtemp code is a bit too quick at shutting the machine down when reaching the critical temperature (tmax + 8) and doesn't leave the fan enough time to actually cool it down. This happens if the temperature of a CPU suddenly rises too high in a very short period of time, or occasionally on boot (that is the CPUs are already overtemp by the time the driver loads). This patches makes the code a bit more relaxed, leaving a few seconds to the fans to do their job before kicking the machine shutown. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/macintosh/therm_pm72.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/macintosh/therm_pm72.c b/drivers/macintosh/therm_pm72.c
index 5bb36274a5c6..190878eef990 100644
--- a/drivers/macintosh/therm_pm72.c
+++ b/drivers/macintosh/therm_pm72.c
@@ -923,7 +923,7 @@ static void do_monitor_cpu_combined(void)
if (temp_combi >= ((state0->mpu.tmax + 8) << 16)) {
printk(KERN_WARNING "Warning ! Temperature way above maximum (%d) !\n",
temp_combi >> 16);
- state0->overtemp = CPU_MAX_OVERTEMP;
+ state0->overtemp += CPU_MAX_OVERTEMP / 4;
} else if (temp_combi > (state0->mpu.tmax << 16))
state0->overtemp++;
else
@@ -998,7 +998,7 @@ static void do_monitor_cpu_split(struct cpu_pid_state *state)
printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
" (%d) !\n",
state->index, temp >> 16);
- state->overtemp = CPU_MAX_OVERTEMP;
+ state->overtemp += CPU_MAX_OVERTEMP / 4;
} else if (temp > (state->mpu.tmax << 16))
state->overtemp++;
else
@@ -1060,7 +1060,7 @@ static void do_monitor_cpu_rack(struct cpu_pid_state *state)
printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
" (%d) !\n",
state->index, temp >> 16);
- state->overtemp = CPU_MAX_OVERTEMP;
+ state->overtemp = CPU_MAX_OVERTEMP / 4;
} else if (temp > (state->mpu.tmax << 16))
state->overtemp++;
else