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watchdog: handle comma separated nmi_watchdog command line

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Per the document, the kernel can accept comma separated command line like
nmi_watchdog=nopanic,0.  However, the code doesn't really handle it.  Fix
the kernel to handle it properly.

Link: https://lkml.kernel.org/r/20240430060236.1878002-1-song@kernel.org
Signed-off-by: Song Liu <song@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Song Liu 2024-04-29 23:02:35 -07:00 committed by Andrew Morton
parent 91d743a9c8
commit 602ba77361
1 changed files with 7 additions and 0 deletions
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7
kernel/watchdog.c
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@ -71,6 +71,7 @@ void __init hardlockup_detector_disable(void)
static int __init hardlockup_panic_setup(char *str)
{
next:
if (!strncmp(str, "panic", 5))
hardlockup_panic = 1;
else if (!strncmp(str, "nopanic", 7))
@ -79,6 +80,12 @@ static int __init hardlockup_panic_setup(char *str)
watchdog_hardlockup_user_enabled = 0;
else if (!strncmp(str, "1", 1))
watchdog_hardlockup_user_enabled = 1;
while (*(str++)) {
if (*str == ',') {
str++;
goto next;
}
}
return 1;
}
__setup("nmi_watchdog=", hardlockup_panic_setup);