[PATCH v4 5/5] scsi: ufs: Do not free irq in suspend

[Can Guo]

If PM QoS is enabled and we set request type to PM_QOS_REQ_AFFINE_IRQ then
freeing up the irq makes the free_irq() print out warning with call stack.
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@xxxxxxxxxxxxxx>
---
 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)
-- 
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