From: Emil Tantilov <emil.s.tantilov@intel.com>
To: intel-wired-lan@lists.osuosl.org
Cc: netdev@vger.kernel.org, anthony.l.nguyen@intel.com,
aleksandr.loktionov@intel.com, przemyslaw.kitszel@intel.com,
andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com,
kuba@kernel.org, pabeni@redhat.com, bigeasy@linutronix.de,
clrkwllms@kernel.org, rostedt@goodmis.org,
linux-rt-devel@lists.linux.dev, sgzhang@google.com,
boolli@google.com, Emil Tantilov <emil.s.tantilov@intel.com>,
stable@vger.kernel.org
Subject: [PATCH iwl-net v2 2/3] idpf: improve locking around idpf_vc_xn_push_free()
Date: Thu, 19 Mar 2026 14:13:34 -0700 [thread overview]
Message-ID: <20260319211335.23236-3-emil.s.tantilov@intel.com> (raw)
In-Reply-To: <20260319211335.23236-1-emil.s.tantilov@intel.com>
Protect the set_bit() operation for the free_xn bitmask in
idpf_vc_xn_push_free(), to make the locking consistent with rest of the
code and avoid potential races in that logic.
Fixes: 34c21fa894a1 ("idpf: implement virtchnl transaction manager")
Cc: stable@vger.kernel.org
Reported-by: Ray Zhang <sgzhang@google.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
---
drivers/net/ethernet/intel/idpf/idpf_virtchnl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
index 582e0c8e9dc0..fbd5a15b015c 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
@@ -402,7 +402,9 @@ static void idpf_vc_xn_push_free(struct idpf_vc_xn_manager *vcxn_mngr,
struct idpf_vc_xn *xn)
{
idpf_vc_xn_release_bufs(xn);
+ spin_lock_bh(&vcxn_mngr->xn_bm_lock);
set_bit(xn->idx, vcxn_mngr->free_xn_bm);
+ spin_unlock_bh(&vcxn_mngr->xn_bm_lock);
}
/**
--
2.37.3
next prev parent reply other threads:[~2026-03-19 21:14 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-19 21:13 [PATCH iwl-net v2 0/3] idpf: virtchnl locking and async fixes Emil Tantilov
2026-03-19 21:13 ` [PATCH iwl-net v2 1/3] idpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling Emil Tantilov
2026-03-20 7:23 ` Loktionov, Aleksandr
2026-03-19 21:13 ` Emil Tantilov [this message]
2026-03-20 7:23 ` [PATCH iwl-net v2 2/3] idpf: improve locking around idpf_vc_xn_push_free() Loktionov, Aleksandr
2026-03-20 7:42 ` Sebastian Andrzej Siewior
2026-03-23 16:20 ` Tantilov, Emil S
2026-03-19 21:13 ` [PATCH iwl-net v2 3/3] idpf: set the payload size before calling the async handler Emil Tantilov
2026-03-20 7:35 ` [PATCH iwl-net v2 0/3] idpf: virtchnl locking and async fixes Sebastian Andrzej Siewior
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