sfc: Remove redundant parameter to efx_filter_search()

The 'for_insert' parameter is redundant since there are no longer
any other operations that need to search based on a filter spec.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

drivers/net/ethernet/sfc/filter.c

@@ -522,7 +522,7 @@ static bool efx_filter_equal(const struct efx_filter_spec *left,
 
 static int efx_filter_search(struct efx_filter_table *table,
 			     struct efx_filter_spec *spec, u32 key,
-			     bool for_insert, unsigned int *depth_required)
+			     unsigned int *depth_required)
 {
 	unsigned hash, incr, filter_idx, depth, depth_max;
 
@@ -531,25 +531,20 @@ static int efx_filter_search(struct efx_filter_table *table,
 
 	filter_idx = hash & (table->size - 1);
 	depth = 1;
-	depth_max = (for_insert ?
-		     (spec->priority <= EFX_FILTER_PRI_HINT ?
-		      FILTER_CTL_SRCH_HINT_MAX : FILTER_CTL_SRCH_MAX) :
-		     table->search_depth[spec->type]);
+	depth_max = (spec->priority <= EFX_FILTER_PRI_HINT ?
+		     FILTER_CTL_SRCH_HINT_MAX : FILTER_CTL_SRCH_MAX);
 
 	for (;;) {
-		/* Return success if entry is used and matches this spec
-		 * or entry is unused and we are trying to insert.
-		 */
-		if (test_bit(filter_idx, table->used_bitmap) ?
-		    efx_filter_equal(spec, &table->spec[filter_idx]) :
-		    for_insert) {
+		/* Return success if entry is unused or matches this spec */
+		if (!test_bit(filter_idx, table->used_bitmap) ||
+		    efx_filter_equal(spec, &table->spec[filter_idx])) {
 			*depth_required = depth;
 			return filter_idx;
 		}
 
 		/* Return failure if we reached the maximum search depth */
 		if (depth == depth_max)
-			return for_insert ? -EBUSY : -ENOENT;
+			return -EBUSY;
 
 		filter_idx = (filter_idx + incr) & (table->size - 1);
 		++depth;
@@ -686,7 +681,7 @@ s32 efx_filter_insert_filter(struct efx_nic *efx, struct efx_filter_spec *spec,
 
 	spin_lock_bh(&state->lock);
 
-	rc = efx_filter_search(table, spec, key, true, &depth);
+	rc = efx_filter_search(table, spec, key, &depth);
 	if (rc < 0)
 		goto out;
 	filter_idx = rc;