From: Viresh Kumar viresh.kumar@linaro.org
[ 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@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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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 9eb71f47487b2..1c9d039edb26b 100644 --- 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); }