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platform/mellanox: mlxbf-pmc: fix sscanf() error checking

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commit 95e4b25192 upstream.

The sscanf() function never returns negatives.  It returns the number of
items successfully read.

Fixes: 1a218d312e ("platform/mellanox: mlxbf-pmc: Add Mellanox BlueField PMC driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/4ccdfd28-099b-40bf-8d77-ad4ea2e76b93@kili.mountain
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter
2023-05-15 13:32:37 +03:00
committed by Greg Kroah-Hartman
parent d5ab5447d9
commit fdf8f33e7d
1 changed files with 2 additions and 3 deletions
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5
drivers/platform/mellanox/mlxbf-pmc.c
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@@ -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;