On Thu, May 23, 2024 at 06:41:04AM +0000, Lin Gui (桂林) wrote: > Dear @Greg KH<mailto:gregkh@xxxxxxxxxxxxxxxxxxx>, > > > What is the git id of it in Linus's tree? > [MTK] > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/mmc/core/mmc.c?h=v6.9&id=77e01b49e35f24ebd1659096d5fc5c3b75975545 > > > author Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx> 2023-12-25 17:38:40 +0800 > committer Ulf Hansson <ulf.hansson@xxxxxxxxxx> 2024-01-02 17:54:05 +0100 > commit 77e01b49e35f24ebd1659096d5fc5c3b75975545 (patch) > tree 02a13063666685bc7061b46183fc45298b2dc9f4 /drivers/mmc/core/mmc.c > parent 09f164d393a6671e5ff8342ba6b3cb7fe3f20208 (diff) > download linux-77e01b49e35f24ebd1659096d5fc5c3b75975545.tar.gz > mmc: core: Add HS400 tuning in HS400es initialization > During the initialization to HS400es stage, add a HS400 tuning flow as an > optional process. For Mediatek IP, the HS400es mode requires a specific > tuning to ensure the correct HS400 timing setting. > > Signed-off-by: Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20231225093839.22931-2-mengqi.zhang@xxxxxxxxxxxx > Signed-off-by: Ulf Hansson ulf.hansson@xxxxxxxxxx<mailto:ulf.hansson@xxxxxxxxxx> I don't understand, why does this qualify as a stable patch? The changes says this is "optional", which means the device should work just fine without it, right? Is this a regression fix from something that previously used to work properly? You have read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html right? thanks, greg k-h