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 <[email protected]>
Reviewed-by: Bean Huo <[email protected]>
---
drivers/scsi/ufs/ufshcd.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 6a10003..a79fbbd 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5696,6 +5696,19 @@ 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
@@ -5915,18 +5928,12 @@ 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.
On 8/3/2020 2:04 AM, Can Guo wrote:
> 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 <[email protected]>
> Reviewed-by: Bean Huo <[email protected]>
> ---
Reviewed-by: Asutosh Das <[email protected]>
> drivers/scsi/ufs/ufshcd.c | 23 +++++++++++++++--------
> 1 file changed, 15 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 6a10003..a79fbbd 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -5696,6 +5696,19 @@ 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
> @@ -5915,18 +5928,12 @@ 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;
>
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
Linux Foundation Collaborative Project