net/mlx5: HWS, changed E2BIG error to a negative return code

Fixed all the 'E2BIG' returns in error flow of functions to
the negative '-E2BIG' as we are using negative error codes
everywhere in HWS code.

This also fixes the following smatch warnings:
	"warn: was negative '-E2BIG' intended?"

Fixes: 74a778b4 ("net/mlx5: HWS, added definers handling")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/f8c77688-7d83-4937-baba-ac844dfe2e0b@stanley.mountain/Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_bwc_complex.c

@@ -33,7 +33,7 @@ bool mlx5hws_bwc_match_params_is_complex(struct mlx5hws_context *ctx,
 		 * and let the usual match creation path handle it,
 		 * both for good and bad flows.
 		 */
-		if (ret == E2BIG) {
+		if (ret == -E2BIG) {
 			is_complex = true;
 			mlx5hws_dbg(ctx, "Matcher definer layout: need complex matcher\n");
 		} else {

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_definer.c

@@ -1845,7 +1845,7 @@ hws_definer_find_best_match_fit(struct mlx5hws_context *ctx,
 		return 0;
 	}
 
-	return E2BIG;
+	return -E2BIG;
 }
 
 static void
@@ -1931,7 +1931,7 @@ mlx5hws_definer_calc_layout(struct mlx5hws_context *ctx,
 	/* Find the match definer layout for header layout match union */
 	ret = hws_definer_find_best_match_fit(ctx, match_definer, match_hl);
 	if (ret) {
-		if (ret == E2BIG)
+		if (ret == -E2BIG)
 			mlx5hws_dbg(ctx,
 				    "Failed to create match definer from header layout - E2BIG\n");
 		else

drivers/net/ethernet/mellanox/mlx5/core/steering/hws/mlx5hws_matcher.c

@@ -675,7 +675,7 @@ static int hws_matcher_bind_mt(struct mlx5hws_matcher *matcher)
 	if (!(matcher->flags & MLX5HWS_MATCHER_FLAGS_COLLISION)) {
 		ret = mlx5hws_definer_mt_init(ctx, matcher->mt);
 		if (ret) {
-			if (ret == E2BIG)
+			if (ret == -E2BIG)
 				mlx5hws_err(ctx, "Failed to set matcher templates with match definers\n");
 			return ret;
 		}