6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vamshi Gajjela <vamshigajjela@xxxxxxxxxx> commit ab9fd06cb8f0db0854291833fc40c789e43a361f upstream. The ufshcd_add_delay_before_dme_cmd() always introduces a delay of MIN_DELAY_BEFORE_DME_CMDS_US between DME commands even when it's not required. The delay is added when the UFS host controller supplies the quirk UFSHCD_QUIRK_DELAY_BEFORE_DME_CMDS. Fix the logic to update hba->last_dme_cmd_tstamp to ensure subsequent DME commands have the correct delay in the range of 0 to MIN_DELAY_BEFORE_DME_CMDS_US. Update the timestamp at the end of the function to ensure it captures the latest time after any necessary delay has been applied. Signed-off-by: Vamshi Gajjela <vamshigajjela@xxxxxxxxxx> Link: https://lore.kernel.org/r/20240724135126.1786126-1-vamshigajjela@xxxxxxxxxx Fixes: cad2e03d8607 ("ufs: add support to allow non standard behaviours (quirks)") Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/ufs/core/ufshcd.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -3971,11 +3971,16 @@ static inline void ufshcd_add_delay_befo min_sleep_time_us = MIN_DELAY_BEFORE_DME_CMDS_US - delta; else - return; /* no more delay required */ + min_sleep_time_us = 0; /* no more delay required */ } - /* allow sleep for extra 50us if needed */ - usleep_range(min_sleep_time_us, min_sleep_time_us + 50); + if (min_sleep_time_us > 0) { + /* allow sleep for extra 50us if needed */ + usleep_range(min_sleep_time_us, min_sleep_time_us + 50); + } + + /* update the last_dme_cmd_tstamp */ + hba->last_dme_cmd_tstamp = ktime_get(); } /**
