Stewart, Sean a8e5a2d593 [SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning ... During testing, it was discovered that when a device tries to attach to the alua handler while in TPG state of transitioning, the alua_rtpg function will wait for it to exit the state before allowing it to continue. As a result, if the 60 second timeout expires, the alua handler will not attach to the device. To fix this, I have introduced an input argument to alua_rtpg called wait_for_transition. The idea is that it will wait for the transition to complete before an activation (because the current TPG state has some bearing in that case), but during a discovery if it is transitioning, it will not wait, and will store the state as standby for the time being. I believe the precedent exists for this from commit c0d289b3e5 Since if the device reports a state of transitioning, it can transition to other more valid states, and it has been established TPGS is supported on the device, if it is attaching. Signed-off-by: Sean Stewart <Sean.Stewart@netapp.com> Acked-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Parallels.com>		2013-10-25 11:19:33 +01:00
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Kconfig
Makefile
scsi_dh_alua.c	[SCSI] scsi_dh_alua: ALUA handler attach should succeed while TPG is transitioning	2013-10-25 11:19:33 +01:00
scsi_dh_emc.c
scsi_dh_hp_sw.c
scsi_dh_rdac.c
scsi_dh.c