From: Randy Dunlap rdunlap@infradead.org
[ Upstream commit 53819a0d97aace1425bb042829e3446952a9e8a9 ]
__setup() handlers should return 1 to indicate that the boot option has been handled or 0 to indicate that it was not handled. Add a pr_warn() message if the option value is invalid and then always return 1.
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru Fixes: 86b40567b917 ("tty: replace strict_strtoul() with kstrtoul()") Cc: Jingoo Han jg1.han@samsung.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Jiri Slaby jirislaby@kernel.org Cc: Michael Ellerman mpe@ellerman.id.au Cc: Julian Wiedmann jwi@linux.ibm.com Cc: Vasily Gorbik gor@linux.ibm.com Cc: linuxppc-dev@lists.ozlabs.org Reported-by: Igor Zhbanov i.zhbanov@omprussia.ru Signed-off-by: Randy Dunlap rdunlap@infradead.org Link: https://lore.kernel.org/r/20220308024228.20477-1-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/tty/hvc/hvc_iucv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index a74680729825..be1bef7896a5 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -1470,7 +1470,9 @@ static int __init hvc_iucv_init(void) */ static int __init hvc_iucv_config(char *val) { - return kstrtoul(val, 10, &hvc_iucv_devices); + if (kstrtoul(val, 10, &hvc_iucv_devices)) + pr_warn("hvc_iucv= invalid parameter value '%s'\n", val); + return 1; }