From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Can Guo <cang@codeaurora.org>,
Bart Van Assche <bvanassche@acm.org>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Sasha Levin <sashal@kernel.org>,
linux-scsi@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 04/26] scsi: pm: Balance pm_only counter of request queue during system resume
Date: Thu, 28 May 2020 07:56:32 -0400 [thread overview]
Message-ID: <20200528115654.1406165-4-sashal@kernel.org> (raw)
In-Reply-To: <20200528115654.1406165-1-sashal@kernel.org>
From: Can Guo <cang@codeaurora.org>
[ Upstream commit 05d18ae1cc8a0308b12f37b4ab94afce3535fac9 ]
During system resume, scsi_resume_device() decreases a request queue's
pm_only counter if the scsi device was quiesced before. But after that, if
the scsi device's RPM status is RPM_SUSPENDED, the pm_only counter is still
held (non-zero). Current SCSI resume hook only sets the RPM status of the
scsi_device and its request queue to RPM_ACTIVE, but leaves the pm_only
counter unchanged. This may make the request queue's pm_only counter remain
non-zero after resume hook returns, hence those who are waiting on the
mq_freeze_wq would never be woken up. Fix this by calling
blk_post_runtime_resume() if a sdev's RPM status was RPM_SUSPENDED.
(struct request_queue)0xFFFFFF815B69E938
pm_only = (counter = 2),
rpm_status = 0,
dev = 0xFFFFFF815B0511A0,
((struct device)0xFFFFFF815B0511A0)).power
is_suspended = FALSE,
runtime_status = RPM_ACTIVE,
(struct scsi_device)0xffffff815b051000
request_queue = 0xFFFFFF815B69E938,
sdev_state = SDEV_RUNNING,
quiesced_by = 0x0,
B::v.f_/task_0xFFFFFF810C246940
-000|__switch_to(prev = 0xFFFFFF810C246940, next = 0xFFFFFF80A49357C0)
-001|context_switch(inline)
-001|__schedule(?)
-002|schedule()
-003|blk_queue_enter(q = 0xFFFFFF815B69E938, flags = 0)
-004|generic_make_request(?)
-005|submit_bio(bio = 0xFFFFFF80A8195B80)
Link: https://lore.kernel.org/r/1588740936-28846-1-git-send-email-cang@codeaurora.org
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/scsi_pm.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/scsi_pm.c b/drivers/scsi/scsi_pm.c
index 3717eea37ecb..5f0ad8b32e3a 100644
--- a/drivers/scsi/scsi_pm.c
+++ b/drivers/scsi/scsi_pm.c
@@ -80,6 +80,10 @@ static int scsi_dev_type_resume(struct device *dev,
dev_dbg(dev, "scsi resume: %d\n", err);
if (err == 0) {
+ bool was_runtime_suspended;
+
+ was_runtime_suspended = pm_runtime_suspended(dev);
+
pm_runtime_disable(dev);
err = pm_runtime_set_active(dev);
pm_runtime_enable(dev);
@@ -93,8 +97,10 @@ static int scsi_dev_type_resume(struct device *dev,
*/
if (!err && scsi_is_sdev_device(dev)) {
struct scsi_device *sdev = to_scsi_device(dev);
-
- blk_set_runtime_active(sdev->request_queue);
+ if (was_runtime_suspended)
+ blk_post_runtime_resume(sdev->request_queue, 0);
+ else
+ blk_set_runtime_active(sdev->request_queue);
}
}
--
2.25.1
next prev parent reply other threads:[~2020-05-28 12:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-28 11:56 [PATCH AUTOSEL 5.4 01/26] ARC: Fix ICCM & DCCM runtime size checks Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 02/26] ARC: [plat-eznps]: Restrict to CONFIG_ISA_ARCOMPACT Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 03/26] evm: Fix RCU list related warnings Sasha Levin
2020-05-28 11:56 ` Sasha Levin [this message]
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 05/26] i2c: altera: Fix race between xfer_msg and isr thread Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 06/26] io_uring: initialize ctx->sqo_wait earlier Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 07/26] net sched: fix reporting the first-time use timestamp Sasha Levin
2020-05-31 21:19 ` Pavel Machek
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 08/26] x86/mmiotrace: Use cpumask_available() for cpumask_var_t variables Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 09/26] net: bmac: Fix read of MAC address from ROM Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 10/26] r8152: support additional Microsoft Surface Ethernet Adapter variant Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 11/26] drm/edid: Add Oculus Rift S to non-desktop list Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 12/26] s390/mm: fix set_huge_pte_at() for empty ptes Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 13/26] null_blk: return error for invalid zone size Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 14/26] net: mvpp2: fix RX hashing for non-10G ports Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 15/26] net/ethernet/freescale: rework quiesce/activate for ucc_geth Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 16/26] net: ethernet: stmmac: Enable interface clocks on probe for IPQ806x Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 17/26] selftests: mlxsw: qos_mc_aware: Specify arping timeout as an integer Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 18/26] net: sun: fix missing release regions in cas_init_one() Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 19/26] net/mlx5: Add command entry handling completion Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 20/26] net/mlx5e: Fix inner tirs handling Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 21/26] net/mlx5: Fix memory leak in mlx5_events_init Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 22/26] net/mlx5e: Update netdev txq on completions during closure Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 23/26] net/mlx5: Fix error flow in case of function_setup failure Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 24/26] net: ethernet: ti: cpsw: fix ASSERT_RTNL() warning during suspend Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 25/26] net/mlx4_core: fix a memory leak bug Sasha Levin
2020-05-28 11:56 ` [PATCH AUTOSEL 5.4 26/26] net: smsc911x: Fix runtime PM imbalance on error Sasha Levin
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