From: Randy Dunlap rdunlap@infradead.org
[ Upstream commit 6a861abceecb68497dd82a324fee45a5332dcece ]
__setup() handlers should return 1 to obsolete_checksetup() in init/main.c to indicate that the boot option has been handled. A return of 0 causes the boot option/value to be listed as an Unknown kernel parameter and added to init's (limited) environment strings.
The __setup() handler interface isn't meant to handle negative return values -- they are non-zero, so they mean "handled" (like a return value of 1 does), but that's just a quirk. So return 1 from parse_pmtmr(). Also print a warning message if kstrtouint() returns an error.
Fixes: 6b148507d3d0 ("pmtmr: allow command line override of ioport") Signed-off-by: Randy Dunlap rdunlap@infradead.org Reported-by: Igor Zhbanov i.zhbanov@omprussia.ru Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clocksource/acpi_pm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c index 28037d0b8dcd..55348e7c1e6f 100644 --- a/drivers/clocksource/acpi_pm.c +++ b/drivers/clocksource/acpi_pm.c @@ -230,8 +230,10 @@ static int __init parse_pmtmr(char *arg) int ret;
ret = kstrtouint(arg, 16, &base); - if (ret) - return ret; + if (ret) { + pr_warn("PMTMR: invalid 'pmtmr=' value: '%s'\n", arg); + return 1; + }
pr_info("PMTMR IOPort override: 0x%04x -> 0x%04x\n", pmtmr_ioport, base);