From 740a50de9f50ff7b065b9b09334eca15c4a29438 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 15 May 2023 13:32:37 +0300 Subject: [PATCH] platform/mellanox: mlxbf-pmc: fix sscanf() error checking MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit 95e4b25192e9238fd2dbe85d96dd2f8fd1ce9d14 upstream. The sscanf() function never returns negatives. It returns the number of items successfully read. Fixes: 62da33ca9fac ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField PMC driver") Signed-off-by: Dan Carpenter Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/4ccdfd28-099b-40bf-8d77-ad4ea2e76b93@kili.mountain Reviewed-by: Hans de Goede Signed-off-by: Hans de Goede Signed-off-by: Greg Kroah-Hartman --- drivers/platform/mellanox/mlxbf-pmc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/platform/mellanox/mlxbf-pmc.c b/drivers/platform/mellanox/mlxbf-pmc.c index c2c9b0d3244cb..be967d797c28e 100644 --- a/drivers/platform/mellanox/mlxbf-pmc.c +++ b/drivers/platform/mellanox/mlxbf-pmc.c @@ -1348,9 +1348,8 @@ static int mlxbf_pmc_map_counters(struct device *dev) for (i = 0; i < pmc->total_blocks; ++i) { if (strstr(pmc->block_name[i], "tile")) { - ret = sscanf(pmc->block_name[i], "tile%d", &tile_num); - if (ret < 0) - return ret; + if (sscanf(pmc->block_name[i], "tile%d", &tile_num) != 1) + return -EINVAL; if (tile_num >= pmc->tile_count) continue; -- 2.39.5