Re: [PATCH 1/1] watchdog: pcipcwd_show_card_info: wrong format string

From: Guenter Roeck
Date: Sat Nov 05 2016 - 11:29:40 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.

Guenter