diff mbox series

[net,3/5] net/mlx5e: Take state lock during tx timeout reporter

Message ID 20240808144107.2095424-4-tariqt@nvidia.com (mailing list archive)
State Accepted
Commit e6b5afd30b99b43682a7764e1a74a42fe4d5f4b3
Delegated to: Netdev Maintainers
Headers show
Series mlx5 misc fixes 2024-08-08 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag present in non-next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 29 this patch: 29
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 3 maintainers not CCed: rrameshbabu@nvidia.com przemyslaw.kitszel@intel.com linux-rdma@vger.kernel.org
netdev/build_clang success Errors and warnings before: 29 this patch: 29
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 29 this patch: 29
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-08-09--09-00 (tests: 705)

Commit Message

Tariq Toukan Aug. 8, 2024, 2:41 p.m. UTC 
From: Dragos Tatulea <dtatulea@nvidia.com>

mlx5e_safe_reopen_channels() requires the state lock taken. The
referenced changed in the Fixes tag removed the lock to fix another
issue. This patch adds it back but at a later point (when calling
mlx5e_safe_reopen_channels()) to avoid the deadlock referenced in the
Fixes tag.

Fixes: eab0da38912e ("net/mlx5e: Fix possible deadlock on mlx5e_tx_timeout_work")
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Link: https://lore.kernel.org/all/ZplpKq8FKi3vwfxv@gmail.com/T/
Reviewed-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
index 22918b2ef7f1..09433b91be17 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
@@ -146,7 +146,9 @@  static int mlx5e_tx_reporter_timeout_recover(void *ctx)
 		return err;
 	}
 
+	mutex_lock(&priv->state_lock);
 	err = mlx5e_safe_reopen_channels(priv);
+	mutex_unlock(&priv->state_lock);
 	if (!err) {
 		to_ctx->status = 1; /* all channels recovered */
 		return err;