From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
hongwus@codeaurora.org, rnayak@codeaurora.org,
sh425.lee@samsung.com, linux-scsi@vger.kernel.org,
kernel-team@android.com, saravanak@google.com,
salyzyn@google.com, cang@codeaurora.org
Cc: 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 v6 3/8] scsi: ufs-qcom: Fix schedule while atomic error in ufs_qcom_dump_dbg_regs
Date: Thu, 23 Jul 2020 04:46:21 -0700 [thread overview]
Message-ID: <1595504787-19429-4-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1595504787-19429-1-git-send-email-cang@codeaurora.org>
Dumping testbus registers needs to sleep a bit intermittently as there are
too many of them. Skip them for those contexts where sleep is not allowed.
Signed-off-by: Can Guo <cang@codeaurora.org>
---
drivers/scsi/ufs/ufs-qcom.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 7da27ee..7831b2b 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -1651,13 +1651,16 @@ static void ufs_qcom_dump_dbg_regs(struct ufs_hba *hba)
ufshcd_dump_regs(hba, REG_UFS_SYS1CLK_1US, 16 * 4,
"HCI Vendor Specific Registers ");
- /* sleep a bit intermittently as we are dumping too much data */
ufs_qcom_print_hw_debug_reg_all(hba, NULL, ufs_qcom_dump_regs_wrapper);
- udelay(1000);
- ufs_qcom_testbus_read(hba);
- udelay(1000);
- ufs_qcom_print_unipro_testbus(hba);
- udelay(1000);
+
+ if (in_task()) {
+ /* sleep a bit intermittently as we are dumping too much data */
+ usleep_range(1000, 1100);
+ ufs_qcom_testbus_read(hba);
+ usleep_range(1000, 1100);
+ ufs_qcom_print_unipro_testbus(hba);
+ usleep_range(1000, 1100);
+ }
}
/**
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2020-07-23 11:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 11:46 [PATCH v6 0/8] Fix up and simplify error recovery mechanism Can Guo
2020-07-23 11:46 ` [PATCH v6 1/8] scsi: ufs: Add checks before setting clk-gating states Can Guo
2020-07-23 11:46 ` [PATCH v6 2/8] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config Can Guo
2020-07-27 12:52 ` Avri Altman
2020-07-23 11:46 ` Can Guo [this message]
2020-07-27 13:05 ` [PATCH v6 3/8] scsi: ufs-qcom: Fix schedule while atomic error in ufs_qcom_dump_dbg_regs Avri Altman
2020-07-28 2:21 ` Can Guo
2020-07-23 11:46 ` [PATCH v6 4/8] scsi: ufs: Add some debug infos to ufshcd_print_host_state Can Guo
2020-07-27 13:12 ` Avri Altman
2020-07-23 11:46 ` [PATCH v6 5/8] scsi: ufs: Fix concurrency of error handler and other error recovery paths Can Guo
2020-07-23 11:46 ` [PATCH v6 6/8] scsi: ufs: Recover hba runtime PM error in error handler Can Guo
2020-07-23 11:46 ` [PATCH v6 7/8] scsi: ufs: Move dumps in IRQ handler to " Can Guo
2020-07-23 11:46 ` [PATCH v6 8/8] scsi: ufs: Fix a racing problem btw error handler and runtime PM ops Can Guo
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