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From: Can Guo <cang@codeaurora.org>
To: asutoshd@codeaurora.org, nguyenb@codeaurora.org,
	hongwus@codeaurora.org, rnayak@codeaurora.org,
	linux-scsi@vger.kernel.org, kernel-team@android.com,
	saravanak@google.com, salyzyn@google.com, cang@codeaurora.org
Cc: 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>,
	Stanley Chu <stanley.chu@mediatek.com>,
	Bean Huo <beanhuo@micron.com>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 7/8] scsi: ufs: Move dumps in IRQ handler to error handler
Date: Fri, 31 Jul 2020 01:08:07 -0700
Message-ID: <1596182890-10086-8-git-send-email-cang@codeaurora.org> (raw)
In-Reply-To: <1596182890-10086-1-git-send-email-cang@codeaurora.org>

Sometime dumps in IRQ handler are heavy enough to cause system stability
issues, move them to error handler and only print basic host regs here.

Signed-off-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index d57791c..8265a2a 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5678,6 +5678,19 @@ static void ufshcd_err_handler(struct work_struct *work)
 				    UFSHCD_UIC_DL_TCx_REPLAY_ERROR))))
 		needs_reset = true;
 
+	if (hba->saved_err & (INT_FATAL_ERRORS | UIC_ERROR |
+			      UFSHCD_UIC_HIBERN8_MASK)) {
+		bool pr_prdt = !!(hba->saved_err & SYSTEM_BUS_FATAL_ERROR);
+
+		spin_unlock_irqrestore(hba->host->host_lock, flags);
+		ufshcd_print_host_state(hba);
+		ufshcd_print_pwr_info(hba);
+		ufshcd_print_host_regs(hba);
+		ufshcd_print_tmrs(hba, hba->outstanding_tasks);
+		ufshcd_print_trs(hba, hba->outstanding_reqs, pr_prdt);
+		spin_lock_irqsave(hba->host->host_lock, flags);
+	}
+
 	/*
 	 * if host reset is required then skip clearing the pending
 	 * transfers forcefully because they will get cleared during
@@ -5896,18 +5909,12 @@ static irqreturn_t ufshcd_check_errors(struct ufs_hba *hba)
 
 		/* dump controller state before resetting */
 		if (hba->saved_err & (INT_FATAL_ERRORS | UIC_ERROR)) {
-			bool pr_prdt = !!(hba->saved_err &
-					SYSTEM_BUS_FATAL_ERROR);
-
 			dev_err(hba->dev, "%s: saved_err 0x%x saved_uic_err 0x%x\n",
 					__func__, hba->saved_err,
 					hba->saved_uic_err);
-
-			ufshcd_print_host_regs(hba);
+			ufshcd_dump_regs(hba, 0, UFSHCI_REG_SPACE_SIZE,
+					 "host_regs: ");
 			ufshcd_print_pwr_info(hba);
-			ufshcd_print_tmrs(hba, hba->outstanding_tasks);
-			ufshcd_print_trs(hba, hba->outstanding_reqs,
-					pr_prdt);
 		}
 		ufshcd_schedule_eh_work(hba);
 		retval |= IRQ_HANDLED;
-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.


  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  8:08 [PATCH v8 0/8] Fix up and simplify error recovery mechanism Can Guo
2020-07-31  8:08 ` [PATCH 1/8] scsi: ufs: Add checks before setting clk-gating states Can Guo
2020-07-31  8:08 ` [PATCH 2/8] ufs: ufs-qcom: Fix race conditions caused by func ufs_qcom_testbus_config Can Guo
2020-07-31  8:08 ` [PATCH 3/8] scsi: ufs-qcom: Remove testbus dump in ufs_qcom_dump_dbg_regs Can Guo
2020-07-31  8:08 ` [PATCH 4/8] scsi: ufs: Add some debug infos to ufshcd_print_host_state Can Guo
2020-07-31  8:08 ` [PATCH 5/8] scsi: ufs: Fix concurrency of error handler and other error recovery paths Can Guo
2020-07-31  8:08 ` [PATCH 6/8] scsi: ufs: Recover hba runtime PM error in error handler Can Guo
2020-07-31  8:08 ` Can Guo [this message]
2020-07-31  8:08 ` [PATCH 8/8] scsi: ufs: Fix a racing problem btw error handler and runtime PM ops Can Guo
2020-07-31 14:07 [RESEND PATCH v8 0/8] Fix up and simplify error recovery mechanism Can Guo
2020-07-31 14:07 ` [PATCH 7/8] scsi: ufs: Move dumps in IRQ handler to error handler Can Guo

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