On Mon, 21 Oct 2019 at 10:21, Yi Zheng <goodmenzy@xxxxxxxxx> wrote: > > Hi, all, > > In the commit v4.10-rc8-9-g46bc5c408e4e, Jungseung Lee introduced an easy > way to access the EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A/B registers. > > That is fine, it avoid to parse the ECSD raw data from the debugfs mnt point: > /sys/kernel/debug/mmc0/mmc0:0001/ext_csd. > > But the code seems that only read the ECSD when init the Card. On our machines > with BGA chip, run in long time, that sysfs attr seems not updated. It > only keeps the > original values when booting/init. > > Any plan to update that ? Well, the current approach is as you say, a snapshot taken at card initialization. The life time time bits is not the only bits that may get updated over time, so it seems we need to re-read the EXT_CSD to get the latest data. At least for some of the bits in the EXT_CSD. If you or someone else sends a patch, I would not have a problem accepting that. Kind regards Uffe
