From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
hongwus@codeaurora.org, linux-scsi@vger.kernel.org,
kernel-team@android.com, cang@codeaurora.org
Cc: Nitin Rawat <nitirawa@codeaurora.org>,
Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
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>,
linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM SUPPORT),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v2 2/3] scsi: ufs-qcom: Disable interrupt in reset path
Date: Tue, 23 Feb 2021 21:36:48 -0800 [thread overview]
Message-ID: <1614145010-36079-3-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1614145010-36079-1-git-send-email-cang@codeaurora.org>
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>
---
drivers/scsi/ufs/ufs-qcom.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index f97d7b0..a9dc8d7 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;
}
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2021-02-24 5:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1614145010-36079-1-git-send-email-cang@codeaurora.org>
2021-02-24 5:36 ` [PATCH v2 1/3] scsi: ufs: Minor adjustments to error handling Can Guo
2021-03-03 7:22 ` Avri Altman
2021-03-03 10:03 ` Can Guo
2021-03-03 10:06 ` Can Guo
2021-03-03 11:43 ` Avri Altman
2021-02-24 5:36 ` Can Guo [this message]
2021-02-28 14:23 ` [PATCH v2 2/3] scsi: ufs-qcom: Disable interrupt in reset path Avri Altman
2021-03-03 4:07 ` Can Guo
2021-03-03 7:18 ` Avri Altman
2021-02-24 5:36 ` [PATCH v2 3/3] scsi: ufs: Remove redundant checks of !hba in suspend/resume callbacks Can Guo
2021-03-03 7:19 ` Avri Altman
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