[PATCH AUTOSEL 5.11 11/61] scsi: ufs: ufs-qcom: Disable interrupt in reset path
From: Sasha Levin <sashal@kernel.org>
Date: 2021-03-17 00:57:11
Also in:
linux-arm-msm, linux-scsi, lkml
Subsystem:
scsi subsystem, the rest · Maintainers:
"James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
From: Nitin Rawat <redacted> [ Upstream commit 4a791574a0ccf36eb3a0a46fbd71d2768df3eef9 ] Disable interrupt in reset path to flush pending IRQ handler in order to avoid possible NoC issues. Link: https://lore.kernel.org/r/1614145010-36079-3-git-send-email-cang@codeaurora.org (local) Reviewed-by: Avri Altman <avri.altman@wdc.com> Signed-off-by: Nitin Rawat <redacted> Signed-off-by: Can Guo <redacted> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.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 2206b1e4b774..e55201f64c10 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; }
--
2.30.1