From: Sebastian Ott Date: Tue, 25 Jun 2013 13:34:54 +0000 (+0200) Subject: s390/vmwatchdog: do not use static data X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=739737efb57d74c71355c56cf5538048c9510507;p=linux-beck.git s390/vmwatchdog: do not use static data Using static data for fields which are accessed by HW will fail if the driver is build as a module (since this would be vmalloc'ed memory). This Bug was revealed via "s390: remove virt_to_phys implementation" - the old virt_to_phys implementation would have translated the address but it was not guaranteed that the memory was contiguous. Fix it by putting the data on the stack. Signed-off-by: Sebastian Ott Reviewed-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- diff --git a/drivers/s390/char/vmwatchdog.c b/drivers/s390/char/vmwatchdog.c index e9b72311e254..d5eac985976b 100644 --- a/drivers/s390/char/vmwatchdog.c +++ b/drivers/s390/char/vmwatchdog.c @@ -112,7 +112,8 @@ static int vmwdt_keepalive(void) static int vmwdt_disable(void) { - int ret = __diag288(wdt_cancel, 0, "", 0); + char cmd[] = {'\0'}; + int ret = __diag288(wdt_cancel, 0, cmd, 0); WARN_ON(ret != 0); clear_bit(VMWDT_RUNNING, &vmwdt_is_open); return ret; @@ -124,7 +125,7 @@ static int __init vmwdt_probe(void) * so we try initializing it with a NOP command ("BEGIN") * that won't cause any harm even if the following disable * fails for some reason */ - static char __initdata ebc_begin[] = { + char ebc_begin[] = { 194, 197, 199, 201, 213 }; if (__diag288(wdt_init, 15, ebc_begin, sizeof(ebc_begin)) != 0)