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From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, rnayak@codeaurora.org,
	linux-scsi@vger.kernel.org, kernel-team@android.com,
	saravanak@google.com, salyzyn@google.com, cang@codeaurora.org
Cc: Stanley Chu <stanley.chu@mediatek.com>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Bean Huo <beanhuo@micron.com>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-kernel@vger.kernel.org (open list),
	linux-arm-kernel@lists.infradead.org (moderated
	list:ARM/Mediatek SoC support),
	linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek
	SoC support)
Subject: [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully
Date: Wed,  5 Aug 2020 22:06:20 -0700	[thread overview]
Message-ID: <1596690383-16438-10-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1596690383-16438-1-git-send-email-cang@codeaurora.org>

In current UFS task abort hook, namely ufshcd_abort(), if a task is
aborted successfully, clock scaling busy time statistics is not updated
and, most important, clk_gating.active_reqs is not decreased, which makes
clk_gating.active_reqs stay above zero forever, thus clock gating would
never happen. To fix it, instead of releasing resources "mannually", use
the existing func __ufshcd_transfer_req_compl(). This can also eliminate
racing of scsi_dma_unmap() from the real completion in IRQ handler path.

Signed-off-by: Can Guo <cang@codeaurora.org>
CC: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b2947ab..9541fc7 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6636,11 +6636,8 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
-	scsi_dma_unmap(cmd);
-
 	spin_lock_irqsave(host->host_lock, flags);
-	ufshcd_outstanding_req_clear(hba, tag);
-	hba->lrb[tag].cmd = NULL;
+	__ufshcd_transfer_req_compl(hba, (1UL << tag));
 	spin_unlock_irqrestore(host->host_lock, flags);
 
 out:
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.


WARNING: multiple messages have this Message-ID (diff)
From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, rnayak@codeaurora.org,
	linux-scsi@vger.kernel.org, kernel-team@android.com,
	saravanak@google.com, salyzyn@google.com, cang@codeaurora.org
Cc: Bart Van Assche <bvanassche@acm.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	open list <linux-kernel@vger.kernel.org>,
	Avri Altman <avri.altman@wdc.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Stanley Chu <stanley.chu@mediatek.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>,
	Bean Huo <beanhuo@micron.com>
Subject: [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully
Date: Wed,  5 Aug 2020 22:06:20 -0700	[thread overview]
Message-ID: <1596690383-16438-10-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1596690383-16438-1-git-send-email-cang@codeaurora.org>

In current UFS task abort hook, namely ufshcd_abort(), if a task is
aborted successfully, clock scaling busy time statistics is not updated
and, most important, clk_gating.active_reqs is not decreased, which makes
clk_gating.active_reqs stay above zero forever, thus clock gating would
never happen. To fix it, instead of releasing resources "mannually", use
the existing func __ufshcd_transfer_req_compl(). This can also eliminate
racing of scsi_dma_unmap() from the real completion in IRQ handler path.

Signed-off-by: Can Guo <cang@codeaurora.org>
CC: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b2947ab..9541fc7 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6636,11 +6636,8 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
-	scsi_dma_unmap(cmd);
-
 	spin_lock_irqsave(host->host_lock, flags);
-	ufshcd_outstanding_req_clear(hba, tag);
-	hba->lrb[tag].cmd = NULL;
+	__ufshcd_transfer_req_compl(hba, (1UL << tag));
 	spin_unlock_irqrestore(host->host_lock, flags);
 
 out:
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.


_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, rnayak@codeaurora.org,
	linux-scsi@vger.kernel.org, kernel-team@android.com,
	saravanak@google.com, salyzyn@google.com, cang@codeaurora.org
Cc: Bart Van Assche <bvanassche@acm.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	open list <linux-kernel@vger.kernel.org>,
	Avri Altman <avri.altman@wdc.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-mediatek@lists.infradead.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Stanley Chu <stanley.chu@mediatek.com>,
	"moderated list:ARM/Mediatek SoC support"
	<linux-arm-kernel@lists.infradead.org>,
	Bean Huo <beanhuo@micron.com>
Subject: [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully
Date: Wed,  5 Aug 2020 22:06:20 -0700	[thread overview]
Message-ID: <1596690383-16438-10-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1596690383-16438-1-git-send-email-cang@codeaurora.org>

In current UFS task abort hook, namely ufshcd_abort(), if a task is
aborted successfully, clock scaling busy time statistics is not updated
and, most important, clk_gating.active_reqs is not decreased, which makes
clk_gating.active_reqs stay above zero forever, thus clock gating would
never happen. To fix it, instead of releasing resources "mannually", use
the existing func __ufshcd_transfer_req_compl(). This can also eliminate
racing of scsi_dma_unmap() from the real completion in IRQ handler path.

Signed-off-by: Can Guo <cang@codeaurora.org>
CC: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b2947ab..9541fc7 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6636,11 +6636,8 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
-	scsi_dma_unmap(cmd);
-
 	spin_lock_irqsave(host->host_lock, flags);
-	ufshcd_outstanding_req_clear(hba, tag);
-	hba->lrb[tag].cmd = NULL;
+	__ufshcd_transfer_req_compl(hba, (1UL << tag));
 	spin_unlock_irqrestore(host->host_lock, flags);
 
 out:
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-08-06 11:01 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-06  5:06 [PATCH v10 0/9] Fix up and simplify error recovery mechanism Can Guo
2020-08-06  5:06 ` [PATCH 1/9] scsi: ufs: Add checks before setting clk-gating states Can Guo
2020-08-06  5:06   ` Can Guo
2020-08-06  5:06   ` Can Guo
2020-08-06  5:06 ` [PATCH 2/9] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config Can Guo
2020-08-06  5:06 ` [PATCH 3/9] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs Can Guo
2020-08-06  5:06 ` [PATCH 4/9] scsi: ufs: Add some debug infos to ufshcd_print_host_state Can Guo
2020-08-06  5:06   ` Can Guo
2020-08-06  5:06   ` Can Guo
2020-08-06  5:06 ` [PATCH 5/9] scsi: ufs: Fix concurrency of error handler and other error recovery paths Can Guo
2020-08-06  5:06 ` [PATCH 6/9] scsi: ufs: Recover hba runtime PM error in error handler Can Guo
2020-08-06  5:06 ` [PATCH 7/9] scsi: ufs: Move dumps in IRQ handler to " Can Guo
2020-08-06  5:06 ` [PATCH 8/9] scsi: ufs: Fix a racing problem btw error handler and runtime PM ops Can Guo
2020-08-06  5:06 ` Can Guo [this message]
2020-08-06  5:06   ` [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully Can Guo
2020-08-06  5:06   ` Can Guo
2020-08-06  5:06 ` [PATCH v9 0/9] Fix up and simplify error recovery mechanism Can Guo
2020-08-07  9:33 [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully Markus Elfring
2020-08-07 13:01 ` Can Guo
2020-08-07 13:01   ` Can Guo
2020-08-07 13:01   ` Can Guo
2020-08-07 13:01   ` Can Guo
2020-08-09 12:15 [PATCH v11 0/9] Fix up and simplify error recovery mechanism Can Guo
2020-08-09 12:15 ` [PATCH 9/9] scsi: ufs: Properly release resources if a task is aborted successfully Can Guo
2020-08-09 12:15   ` Can Guo
2020-08-09 12:15   ` Can Guo

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