net/mlx5e: Initialize on stack link modes bitmap

Initialize link modes bitmap on stack before using it, otherwise the
outcome of ethtool set link ksettings might have unexpected values.

Fixes: 8ea6c2029ea7 ("net/mlx5e: Fix matching of speed to PRM link modes")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index c5a9c20d7f006f554afea951f14da6b06ed8ca57..327c93a7bd55a843dfb16bf27ccdacf61e69efc0 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -1021,7 +1021,7 @@ static bool ext_link_mode_requested(const unsigned long *adver)
 {
 #define MLX5E_MIN_PTYS_EXT_LINK_MODE_BIT ETHTOOL_LINK_MODE_50000baseKR_Full_BIT
        int size = __ETHTOOL_LINK_MODE_MASK_NBITS - MLX5E_MIN_PTYS_EXT_LINK_MODE_BIT;
-       __ETHTOOL_DECLARE_LINK_MODE_MASK(modes);
+       __ETHTOOL_DECLARE_LINK_MODE_MASK(modes) = {0,};
 
        bitmap_set(modes, MLX5E_MIN_PTYS_EXT_LINK_MODE_BIT, size);
        return bitmap_intersects(modes, adver, __ETHTOOL_LINK_MODE_MASK_NBITS);