scsi: ufs: core: Always notify POST_CHANGE even on gear switch failure

Previously, POST_CHANGE was only notified on a successful gear switch.
This could leave the host in an inconsistent state if resources were
acquired in PRE_CHANGE (e.g. disabling auto-hibern8) but never released due
to a missing POST_CHANGE.

Fix this by always calling POST_CHANGE regardless of the gear switch
result. On failure, pass dev_req_params = NULL to signal that there is
nothing to apply; hosts that receive NULL simply skip their post work.

Update the affected drivers (ufs-exynos and ufshcd-pci) to guard their
POST_CHANGE logic with a NULL check so they correctly handle the failure
case.

Fixes: f5ca8d0c7a63 ("scsi: ufs: host: mediatek: Disable auto-hibern8 during power mode changes")
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Link: https://patch.msgid.link/20260914085148.136429-2-peter.wang@mediatek.com
Signed-off-by: Martin K. Petersen (Oracle) <mkp@kernel.org>

0 files changed, 0 insertions, 0 deletions