[2/2] scsi: ufs-qcom: Disable interrupt in reset path

Message ID 1610674580-20811-3-git-send-email-cang@codeaurora.org
State Superseded
Headers show
Series
  • Two minor changes related with error handling
Related show

Commit Message

Can Guo Jan. 15, 2021, 1:36 a.m.
From: Nitin Rawat <nitirawa@codeaurora.org>

Disable interrupt in reset path to flush pending IRQ handler in order to
avoid possible NoC issues.

Signed-off-by: Nitin Rawat <nitirawa@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>

Patch

diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 2206b1e..e55201f 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -253,12 +253,17 @@  static int ufs_qcom_host_reset(struct ufs_hba *hba)
 {
 	int ret = 0;
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+	bool reenable_intr = false;
 
 	if (!host->core_reset) {
 		dev_warn(hba->dev, "%s: reset control not set\n", __func__);
 		goto out;
 	}
 
+	reenable_intr = hba->is_irq_enabled;
+	disable_irq(hba->irq);
+	hba->is_irq_enabled = false;
+
 	ret = reset_control_assert(host->core_reset);
 	if (ret) {
 		dev_err(hba->dev, "%s: core_reset assert failed, err = %d\n",
@@ -280,6 +285,11 @@  static int ufs_qcom_host_reset(struct ufs_hba *hba)
 
 	usleep_range(1000, 1100);
 
+	if (reenable_intr) {
+		enable_irq(hba->irq);
+		hba->is_irq_enabled = true;
+	}
+
 out:
 	return ret;
 }