diff mbox series

[net-next,13/15] net/mlx5: fw_tracer, allow 0 size string DBs

Message ID 20230208003712.68386-14-saeed@kernel.org (mailing list archive)
State Accepted
Commit b0118ced6b2e4c4d76083724cd4dba766333b3cd
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/15] mlx5: reduce stack usage in mlx5_setup_tc | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Pull request is its own cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 24 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Saeed Mahameed Feb. 8, 2023, 12:37 a.m. UTC 
From: Shay Drory <shayd@nvidia.com>

Device can expose string DB of size 0 which means this string DB is
currently not in use. Therefore, allow for 0 size string DBs.

Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
index 4ce75cef46c8..de98357dfd14 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
@@ -233,6 +233,8 @@  static int mlx5_fw_tracer_allocate_strings_db(struct mlx5_fw_tracer *tracer)
 	int i;
 
 	for (i = 0; i < num_string_db; i++) {
+		if (!string_db_size_out[i])
+			continue;
 		tracer->str_db.buffer[i] = kzalloc(string_db_size_out[i], GFP_KERNEL);
 		if (!tracer->str_db.buffer[i])
 			goto free_strings_db;
@@ -278,6 +280,8 @@  static void mlx5_tracer_read_strings_db(struct work_struct *work)
 	}
 
 	for (i = 0; i < num_string_db; i++) {
+		if (!tracer->str_db.size_out[i])
+			continue;
 		offset = 0;
 		MLX5_SET(mtrc_stdb, in, string_db_index, i);
 		num_of_reads = tracer->str_db.size_out[i] /
@@ -384,6 +388,8 @@  static struct tracer_string_format *mlx5_tracer_get_string(struct mlx5_fw_tracer
 	str_ptr = tracer_event->string_event.string_param;
 
 	for (i = 0; i < tracer->str_db.num_string_db; i++) {
+		if (!tracer->str_db.size_out[i])
+			continue;
 		if (str_ptr > tracer->str_db.base_address_out[i] &&
 		    str_ptr < tracer->str_db.base_address_out[i] +
 		    tracer->str_db.size_out[i]) {