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From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	rnayak@codeaurora.org, linux-scsi@vger.kernel.org,
	kernel-team@android.com, saravanak@google.com,
	salyzyn@google.com, cang@codeaurora.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	Pedro Sousa <pedrom.sousa@synopsys.com>,
	"James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	Stanley Chu <stanley.chu@mediatek.com>,
	Bean Huo <beanhuo@micron.com>,
	Tomas Winkler <tomas.winkler@intel.com>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v5 5/5] scsi: ufs: Do not free irq in suspend
Date: Thu, 5 Dec 2019 02:05:35 +0000
Message-ID: <0101016ed3ce2e27-04f59930-fe71-4290-a028-c71e8310ca49-000000@us-west-2.amazonses.com> (raw)
In-Reply-To: <1575511482-15115-1-git-send-email-cang@codeaurora.org>

Since ufshcd irq resource is allocated with the device resource management
aware IRQ request implementation, we don't really need to free up irq
during suspend, disabling it during suspend and reenabling it during resume
should be good enough.

Signed-off-by: Can Guo <cang@codeaurora.org>
---
 drivers/scsi/ufs/ufshcd.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 086d359..c449b68 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -266,26 +266,18 @@ static inline bool ufshcd_valid_tag(struct ufs_hba *hba, int tag)
 	return tag >= 0 && tag < hba->nutrs;
 }
 
-static inline int ufshcd_enable_irq(struct ufs_hba *hba)
+static inline void ufshcd_enable_irq(struct ufs_hba *hba)
 {
-	int ret = 0;
-
 	if (!hba->is_irq_enabled) {
-		ret = request_irq(hba->irq, ufshcd_intr, IRQF_SHARED, UFSHCD,
-				hba);
-		if (ret)
-			dev_err(hba->dev, "%s: request_irq failed, ret=%d\n",
-				__func__, ret);
+		enable_irq(hba->irq);
 		hba->is_irq_enabled = true;
 	}
-
-	return ret;
 }
 
 static inline void ufshcd_disable_irq(struct ufs_hba *hba)
 {
 	if (hba->is_irq_enabled) {
-		free_irq(hba->irq, hba);
+		disable_irq(hba->irq);
 		hba->is_irq_enabled = false;
 	}
 }
@@ -7930,9 +7922,7 @@ static int ufshcd_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op)
 		goto out;
 
 	/* enable the host irq as host controller would be active soon */
-	ret = ufshcd_enable_irq(hba);
-	if (ret)
-		goto disable_irq_and_vops_clks;
+	ufshcd_enable_irq(hba);
 
 	ret = ufshcd_vreg_set_hpm(hba);
 	if (ret)
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


      parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1575511482-15115-1-git-send-email-cang@codeaurora.org>
2019-12-05  2:05 ` [PATCH v5 1/5] scsi: Adjust DBD setting in mode sense for caching mode page per LLD Can Guo
2019-12-05  2:05 ` [PATCH v5 2/5] scsi: ufs: Use DBD setting in mode sense Can Guo
2019-12-05  2:05 ` [PATCH v5 3/5] scsi: ufs: Release clock if DMA map fails Can Guo
2019-12-05  2:05 ` [PATCH v5 4/5] scsi: ufs: Do not clear the DL layer timers Can Guo
2019-12-05  2:05 ` Can Guo [this message]

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