| Message ID | 1595471649-25675-4-git-send-email-cang@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | None | expand |
On 2020-07-23 10:34, Can Guo wrote: > If ufs_qcom_dump_dbg_regs() calls ufs_qcom_testbus_config() from > ufshcd_suspend/resume and/or clk gate/ungate context, > pm_runtime_get_sync() > and ufshcd_hold() will cause racing problems. Fix this by removing the > unnecessary calls of pm_runtime_get_sync() and ufshcd_hold(). > > Signed-off-by: Can Guo <cang@codeaurora.org> > --- > drivers/scsi/ufs/ufs-qcom.c | 5 ----- > 1 file changed, 5 deletions(-) > > diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c > index 2e6ddb5..7da27ee 100644 > --- a/drivers/scsi/ufs/ufs-qcom.c > +++ b/drivers/scsi/ufs/ufs-qcom.c > @@ -1604,9 +1604,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host > *host) > */ > } > mask <<= offset; > - > - pm_runtime_get_sync(host->hba->dev); > - ufshcd_hold(host->hba, false); > ufshcd_rmwl(host->hba, TEST_BUS_SEL, > (u32)host->testbus.select_major << 19, > REG_UFS_CFG1); > @@ -1619,8 +1616,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host > *host) > * committed before returning. > */ > mb(); > - ufshcd_release(host->hba); > - pm_runtime_put_sync(host->hba->dev); > > return 0; > } Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 2e6ddb5..7da27ee 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1604,9 +1604,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) */ } mask <<= offset; - - pm_runtime_get_sync(host->hba->dev); - ufshcd_hold(host->hba, false); ufshcd_rmwl(host->hba, TEST_BUS_SEL, (u32)host->testbus.select_major << 19, REG_UFS_CFG1); @@ -1619,8 +1616,6 @@ int ufs_qcom_testbus_config(struct ufs_qcom_host *host) * committed before returning. */ mb(); - ufshcd_release(host->hba); - pm_runtime_put_sync(host->hba->dev); return 0; }
If ufs_qcom_dump_dbg_regs() calls ufs_qcom_testbus_config() from ufshcd_suspend/resume and/or clk gate/ungate context, pm_runtime_get_sync() and ufshcd_hold() will cause racing problems. Fix this by removing the unnecessary calls of pm_runtime_get_sync() and ufshcd_hold(). Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/scsi/ufs/ufs-qcom.c | 5 ----- 1 file changed, 5 deletions(-)