diff options
| author | Mark Nelson <markn@au1.ibm.com> | 2009-03-23 20:30:41 +0000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2009-04-07 15:07:43 +1000 |
| commit | b6966b1be568e83a48585369731f1123a6f85157 (patch) | |
| tree | cbed24a70a521a32965b18c589035e819003c7a4 /drivers/watchdog | |
| parent | ae6e59caefd8d4097ccb096c95df95ec7e52fe88 (diff) | |
powerpc/wdrtas: Update wdrtas_get_interval to use rtas_data_buf
The buffer passed to the ibm,get-system-parameter RTAS call must be
in the RMA. To ensure we pass an address in the RMA use rtas_data_buf
for the actual RTAS call and then copy the result to value. We can't
just make it static because this can be compiled in as a module.
Also add the WDRTAS_SP_SPI_LEN so we don't litter '4' throughout the
function.
Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Tested-by: Adrian Reber <adrian@lisas.de>
Acked-by: Utz Bacher <utz.bacher@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/wdrtas.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c index 5d3b1a8e28b0..a38fa4907c92 100644 --- a/drivers/watchdog/wdrtas.c +++ b/drivers/watchdog/wdrtas.c @@ -106,6 +106,8 @@ static int wdrtas_set_interval(int interval) return result; } +#define WDRTAS_SP_SPI_LEN 4 + /** * wdrtas_get_interval - returns the current watchdog interval * @fallback_value: value (in seconds) to use, if the RTAS call fails @@ -119,10 +121,17 @@ static int wdrtas_set_interval(int interval) static int wdrtas_get_interval(int fallback_value) { long result; - char value[4]; + char value[WDRTAS_SP_SPI_LEN]; + spin_lock(&rtas_data_buf_lock); + memset(rtas_data_buf, 0, WDRTAS_SP_SPI_LEN); result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL, - WDRTAS_SP_SPI, (void *)__pa(&value), 4); + WDRTAS_SP_SPI, __pa(rtas_data_buf), + WDRTAS_SP_SPI_LEN); + + memcpy(value, rtas_data_buf, WDRTAS_SP_SPI_LEN); + spin_unlock(&rtas_data_buf_lock); + if (value[0] != 0 || value[1] != 2 || value[3] != 0 || result < 0) { printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog " "timeout (%li). Continuing\n", result); |