OPP: debugfs: Fix warning around icc_get_name()

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@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402141313.81ltVF5g-lkp@intel.com/
Fixes: 0430b1d5704b0 ("opp: Expose bandwidth information via debugfs")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>

diff --git a/drivers/opp/debugfs.c b/drivers/opp/debugfs.c
index 22cfde40362553f0dd4a418c1e80174aac9179b2..105de7c3274ad43d93b715b6a6c645b45d835055 100644 (file)
--- a/drivers/opp/debugfs.c
+++ b/drivers/opp/debugfs.c
@@ -37,10 +37,12 @@ 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);
 }