From: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
[ Upstream commit 28330ceb953e39880ea77da4895bb902a1244860 ]
If the kernel isn't built with interconnect support, icc_get_name()
returns NULL and we get following warning:
drivers/opp/debugfs.c: In function 'bw_name_read':
drivers/opp/debugfs.c:43:42: error: '%.62s' directive argument is null [-Werror=format-overflow=]
i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
Fix it.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202402141313.81ltVF5g-lkp@xxxxxxxxx/
Fixes: 0430b1d5704b0 ("opp: Expose bandwidth information via debugfs")
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Reviewed-by: Dhruva Gole <d-gole@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/opp/debugfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index 60f4ff8e044d1..016dea5a412be 100644
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -36,10 +36,12 @@ static ssize_t bw_name_read(struct file *fp, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct icc_path *path = fp->private_data;
+ const char *name = icc_get_name(path);
char buf[64];
- int i;
+ int i = 0;
- i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
+ if (name)
+ i = scnprintf(buf, sizeof(buf), "%.62s\n", name);
return simple_read_from_buffer(userbuf, count, ppos, buf, i);
}
--
2.43.0
