Re: [PATCH 1/1] watchdog: pcipcwd_show_card_info: wrong format string
From: Wim Van Sebroeck
Date: Sun Nov 06 2016 - 11:12:24 EST
> On 11/05/2016 07:50 AM, Heinrich Schuchardt wrote:
> >fw_rev_major and fw_rev_minor are defined as int.
> >Use %d to print them.
> >Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
> > drivers/watchdog/pcwd_pci.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >diff --git a/drivers/watchdog/pcwd_pci.c b/drivers/watchdog/pcwd_pci.c
> >index c0d07ee..e1fbbf6 100644
> >--- a/drivers/watchdog/pcwd_pci.c
> >+++ b/drivers/watchdog/pcwd_pci.c
> >@@ -234,7 +234,7 @@ static void pcipcwd_show_card_info(void)
> > got_fw_rev = send_command(CMD_GET_FIRMWARE_VERSION, &fw_rev_major,
> > &fw_rev_minor);
> > if (got_fw_rev)
> >- sprintf(fw_ver_str, "%u.%02u", fw_rev_major, fw_rev_minor);
> >+ sprintf(fw_ver_str, "%d.%02d", fw_rev_major, fw_rev_minor);
> > else
> > sprintf(fw_ver_str, "<card no answer>");
> Hmm ... I don't think that a negative version number makes much sense.
> Turns out inb() returns a char on some architectures, meaning it is signed,
> meaning it _could_ return a negative number if the version number is 128
> or above. I don't want to risk us reporting version number -128.-110 just
> to make compilers happy.
I couldn't have said this better myself :-) version info is indeed to be consider as an unsigned int.