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>
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1 changed files with 3 additions and 5 deletions
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@ -218,16 +218,14 @@ static void wdrtas_timer_keepalive(void)
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*/
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static int wdrtas_get_temperature(void)
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{
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long result;
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int result;
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int temperature = 0;
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result = rtas_call(wdrtas_token_get_sensor_state, 2, 2,
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(void *)__pa(&temperature),
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WDRTAS_THERMAL_SENSOR, 0);
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result = rtas_get_sensor(WDRTAS_THERMAL_SENSOR, 0, &temperature);
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if (result < 0)
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printk(KERN_WARNING "wdrtas: reading the thermal sensor "
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"faild: %li\n", result);
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"failed: %i\n", result);
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else
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temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */
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