diff mbox series

[net-next,v2,2/8] iavf: simplify mutex_trylock+sleep loops

Message ID 20231027175941.1340255-3-jacob.e.keller@intel.com (mailing list archive)
State Accepted
Commit 5902ee6dc651f4bb536fbc19e654edc7b6d711d2
Delegated to: Netdev Maintainers
Headers show
Series Intel Wired LAN Driver Updates for 2023-10-23 (iavf) | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1362 this patch: 1362
netdev/cc_maintainers warning 5 maintainers not CCed: jesse.brandeburg@intel.com pabeni@redhat.com intel-wired-lan@lists.osuosl.org anthony.l.nguyen@intel.com edumazet@google.com
netdev/build_clang fail Errors and warnings before: 15 this patch: 15
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 No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1387 this patch: 1387
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 18 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jacob Keller Oct. 27, 2023, 5:59 p.m. UTC 
From: Michal Schmidt <mschmidt@redhat.com>

This pattern appears in two places in the iavf source code:
  while (!mutex_trylock(...))
      usleep_range(...);

That's just mutex_lock with extra steps.
The pattern is a leftover from when iavf used bit flags instead of
mutexes for locking. Commit 5ac49f3c2702 ("iavf: use mutexes for locking
of critical sections") replaced test_and_set_bit with !mutex_trylock,
preserving the pattern.

Simplify it to mutex_lock.

Signed-off-by: Michal Schmidt <mschmidt@redhat.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
---
No changes since v1.

 drivers/net/ethernet/intel/iavf/iavf_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c
index fefed96f8035..502ebba2e879 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_main.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
@@ -3011,8 +3011,7 @@  static void iavf_reset_task(struct work_struct *work)
 		return;
 	}
 
-	while (!mutex_trylock(&adapter->client_lock))
-		usleep_range(500, 1000);
+	mutex_lock(&adapter->client_lock);
 	if (CLIENT_ENABLED(adapter)) {
 		adapter->flags &= ~(IAVF_FLAG_CLIENT_NEEDS_OPEN |
 				    IAVF_FLAG_CLIENT_NEEDS_CLOSE |
@@ -5065,8 +5064,7 @@  static int __maybe_unused iavf_suspend(struct device *dev_d)
 
 	netif_device_detach(netdev);
 
-	while (!mutex_trylock(&adapter->crit_lock))
-		usleep_range(500, 1000);
+	mutex_lock(&adapter->crit_lock);
 
 	if (netif_running(netdev)) {
 		rtnl_lock();