From: Avri Altman <Avri.Altman@wdc.com>
To: Can Guo <cang@codeaurora.org>,
"asutoshd@codeaurora.org" <asutoshd@codeaurora.org>,
"nguyenb@codeaurora.org" <nguyenb@codeaurora.org>,
"hongwus@codeaurora.org" <hongwus@codeaurora.org>,
"rnayak@codeaurora.org" <rnayak@codeaurora.org>,
"sh425.lee@samsung.com" <sh425.lee@samsung.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"kernel-team@android.com" <kernel-team@android.com>,
"saravanak@google.com" <saravanak@google.com>,
"salyzyn@google.com" <salyzyn@google.com>
Cc: Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"open list:ARM/QUALCOMM SUPPORT" <linux-arm-msm@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v6 3/8] scsi: ufs-qcom: Fix schedule while atomic error in ufs_qcom_dump_dbg_regs
Date: Mon, 27 Jul 2020 13:05:47 +0000 [thread overview]
Message-ID: <SN6PR04MB4640F4CEAB7F5FFA51648B6CFC720@SN6PR04MB4640.namprd04.prod.outlook.com> (raw)
In-Reply-To: <1595504787-19429-4-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);
> + }
> }
How about moving the intermittent sleep out of the check if preemption is disabled?
And maybe then you need to switch back to uedlay?
next prev parent reply other threads:[~2020-07-27 13:05 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 ` [PATCH v6 3/8] scsi: ufs-qcom: Fix schedule while atomic error in ufs_qcom_dump_dbg_regs Can Guo
2020-07-27 13:05 ` Avri Altman [this message]
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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