On 9/13/24 12:10 AM, Peter Wang (王信友) wrote:
Because the MediaTek UFS controller uses UTRLCLR to clear commands and fills OCS with ABORTED. Regarding the specification of UTRCS: This bit is set to '1' by the host controller upon one of the following: Overall command Status (OCS) of the completed command is not equal to 'SUCCESS' even if its UTRD Interrupt bit set to '0' So, MediaTek host controller will send interrupt in this case.
Hi Peter, Thank you for having shared this information. Please consider introducing a quirk for ignoring completions triggered by clearing a command, e.g. as follows (there may be better approaches): * In ufshcd_clear_cmd(), before a command is cleared, initialize the completion that will be used for waiting for the completion interrupt. After a command has been cleared, call wait_for_completion_timeout(). * In ufshcd_compl_one_cqe(), check whether the completion is the result of a command being cleared. If so, call complete() instead of executing the regular completion code. Thanks, Bart.
