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peak_usb: fix clang build warning

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Clang points out undefined behavior when building the pcan_usb_pro driver:

drivers/net/can/usb/peak_usb/pcan_usb_pro.c:136:15: error: passing an object that undergoes default argument promotion to 'va_start' has undefined behavior [-Werror,-Wvarargs]

Changing the function prototype to avoid argument promotion in the
varargs call avoids the warning, and should make this well-defined.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2019-03-07 11:31:55 +01:00 committed by David S. Miller
parent ae9819e339
commit a2ae6da025
1 changed files with 1 additions and 1 deletions
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2
drivers/net/can/usb/peak_usb/pcan_usb_pro.c
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@ -127,7 +127,7 @@ static u8 *pcan_msg_init_empty(struct pcan_usb_pro_msg *pm,
/*
* add one record to a message being built
*/
static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, u8 id, ...)
static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, int id, ...)
{
int len, i;
u8 *pc;