On 1/28/21 10:29 PM, Can Guo wrote:
> On second thought, actually the 1st fix alone is enough to eliminate the
> race condition. Because blk_mq_tagset_busy_iter() only iterates over all
> requests which are not in IDLE state, if blk_mq_start_request() is called
> within the protection of host spin
On 2021-01-29 14:06, Can Guo wrote:
On 2021-01-29 11:20, Bart Van Assche wrote:
On 1/27/21 8:16 PM, Can Guo wrote:
ufshcd_compl_tm() looks for all 0 bits in the
REG_UTP_TASK_REQ_DOOR_BELL
and call complete() for each req who has the req->end_io_data set.
There
can be a race condition btw tmc s
On 2021-01-29 11:20, Bart Van Assche wrote:
On 1/27/21 8:16 PM, Can Guo wrote:
ufshcd_compl_tm() looks for all 0 bits in the
REG_UTP_TASK_REQ_DOOR_BELL
and call complete() for each req who has the req->end_io_data set.
There
can be a race condition btw tmc send/compl, because the
req->end_io_d
On 1/27/21 8:16 PM, Can Guo wrote:
> ufshcd_compl_tm() looks for all 0 bits in the REG_UTP_TASK_REQ_DOOR_BELL
> and call complete() for each req who has the req->end_io_data set. There
> can be a race condition btw tmc send/compl, because the req->end_io_data is
> set, in __ufshcd_issue_tm_cmd(), w
ufshcd_compl_tm() looks for all 0 bits in the REG_UTP_TASK_REQ_DOOR_BELL
and call complete() for each req who has the req->end_io_data set. There
can be a race condition btw tmc send/compl, because the req->end_io_data is
set, in __ufshcd_issue_tm_cmd(), without host lock protection, so it is
possi
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