linux-kernel - [PATCH 4.14 08/88] scsi: target: core: Fix warning on realtime kernels

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Message-Id: <20210628143628.33342-9-sashal@kernel.org>
Date:   Mon, 28 Jun 2021 10:35:08 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Maurizio Lombardi <mlombard@...hat.com>,
        Bart Van Assche <bvanassche@....org>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 08/88] scsi: target: core: Fix warning on realtime kernels

From: Maurizio Lombardi <mlombard@...hat.com>

[ Upstream commit 515da6f4295c2c42b8c54572cce3d2dd1167c41e ]

On realtime kernels, spin_lock_irq*(spinlock_t) do not disable the
interrupts, a call to irqs_disabled() will return false thus firing a
warning in __transport_wait_for_tasks().

Remove the warning and also replace assert_spin_locked() with
lockdep_assert_held()

Link: https://lore.kernel.org/r/20210531121326.3649-1-mlombard@redhat.com
Reviewed-by: Bart Van Assche <bvanassche@....org>
Signed-off-by: Maurizio Lombardi <mlombard@...hat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/target/target_core_transport.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 0d0be7d8b9d6..852680e85921 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2966,9 +2966,7 @@ __transport_wait_for_tasks(struct se_cmd *cmd, bool fabric_stop,
 	__releases(&cmd->t_state_lock)
 	__acquires(&cmd->t_state_lock)
 {
-
-	assert_spin_locked(&cmd->t_state_lock);
-	WARN_ON_ONCE(!irqs_disabled());
+	lockdep_assert_held(&cmd->t_state_lock);
 
 	if (fabric_stop)
 		cmd->transport_state |= CMD_T_FABRIC_STOP;
-- 
2.30.2