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| author | Can Guo <cang@codeaurora.org> | 2020-08-09 05:15:48 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-30 10:38:32 +0100 |
| commit | 30255785272f896d1f275f095eb0b2089426b153 (patch) | |
| tree | 413d50d1cfda20ce20dba187dadad87cb2f29e10 /drivers/scsi/ufs | |
| parent | 923fe07f1f3ee0e37475795edf9deed1acf03efe (diff) | |
| download | linux-stable-30255785272f896d1f275f095eb0b2089426b153.tar.gz linux-stable-30255785272f896d1f275f095eb0b2089426b153.tar.bz2 linux-stable-30255785272f896d1f275f095eb0b2089426b153.zip | |
scsi: ufs: ufs-qcom: Fix race conditions caused by ufs_qcom_testbus_config()
[ Upstream commit 89dd87acd40a44de8ff3358138aedf8f73f4efc6 ]
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 a race condition. Fix this by removing the
unnecessary calls of pm_runtime_get_sync() and ufshcd_hold().
Link: https://lore.kernel.org/r/1596975355-39813-3-git-send-email-cang@codeaurora.org
Reviewed-by: Hongwu Su <hongwus@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufs-qcom.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index 21e3ff590ec9..798a74535ea7 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1581,9 +1581,6 @@ 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); @@ -1596,8 +1593,6 @@ 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; } |