scsi: ufs: Treat link loss as fatal error

[ Upstream commit c99b9b2301492b665b6e51ba6c06ec362eddcd10 ]

This event is raised when link is lost as specified in UFSHCI spec and that
means communication is not possible. Thus initializing UFS interface needs
to be done.

Make UFS driver considers Link Lost as fatal in the INT_FATAL_ERRORS
mask. This will trigger a host reset whenever a link lost interrupt occurs.

Link: https://lore.kernel.org/r/1642743475-54275-1-git-send-email-kwmad.kim@samsung.com


Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/scsi/ufs/ufshci.h

@@ -138,7 +138,8 @@ enum {
 #define INT_FATAL_ERRORS	(DEVICE_FATAL_ERROR |\
 				CONTROLLER_FATAL_ERROR |\
 				SYSTEM_BUS_FATAL_ERROR |\
-				CRYPTO_ENGINE_FATAL_ERROR)
+				CRYPTO_ENGINE_FATAL_ERROR |\
+				UIC_LINK_LOST)
 
 /* HCS - Host Controller Status 30h */
 #define DEVICE_PRESENT				0x1