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| author | Adrian Reber <adrian@lisas.de> | 2009-03-26 03:05:42 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-06-26 08:55:37 +0200 |
| commit | 5ba762c9bb3ce2cc11e9e111cb3c476e84b91668 (patch) | |
| tree | ed35c2bae740828478f62867bfc69d01de105fe0 /drivers | |
| parent | powerpc/mm: Fix potential access to freed pages when using hugetlbfs (diff) | |
| download | linux-5ba762c9bb3ce2cc11e9e111cb3c476e84b91668.tar.xz linux-5ba762c9bb3ce2cc11e9e111cb3c476e84b91668.zip | |
powerpc/rtas: Fix watchdog driver temperature read functionality
Using the RTAS watchdog driver to read out the temperature crashes
on a PXCAB:
Unable to handle kernel paging request for data at address 0xfe347b50
Faulting instruction address: 0xc00000000001af64
Oops: Kernel access of bad area, sig: 11 [#1]
The wrong usage of "(void *)__pa(&temperature)" in rtas_call() is
removed by using the function rtas_get_sensor() which does the
right thing.
Signed-off-by: Adrian Reber <adrian@lisas.de>
Acked-by: Utz Bacher <utz.bacher@de.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/watchdog/wdrtas.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c index a4fe7a38d9b0..3bde56bce63a 100644 --- a/drivers/watchdog/wdrtas.c +++ b/drivers/watchdog/wdrtas.c @@ -218,16 +218,14 @@ static void wdrtas_timer_keepalive(void) */ static int wdrtas_get_temperature(void) { - long result; + int result; int temperature = 0; - result = rtas_call(wdrtas_token_get_sensor_state, 2, 2, - (void *)__pa(&temperature), - WDRTAS_THERMAL_SENSOR, 0); + result = rtas_get_sensor(WDRTAS_THERMAL_SENSOR, 0, &temperature); if (result < 0) printk(KERN_WARNING "wdrtas: reading the thermal sensor " - "faild: %li\n", result); + "failed: %i\n", result); else temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */ |