s390/cio: include subchannels without devices also for evaluation

[ Upstream commit b1b0d5aec1cf9f9a900a14964f869c68688d923e ]

Currently when the new channel-path is enabled, we do evaluation only
on the subchannels with a device connected on it. This is because,
in the past, if the device in the subchannel is not working or not
available, we used to unregister the subchannels. But, from the 'commit
2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")'
we allow subchannels with or without an active device connected
on it. So, when we do the io_subchannel_verify, make sure that,
we are evaluating the subchannels without any device too.

Fixes: 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")
Reported-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 61cde02b23fec1cec69a515f3002b5b6c0050932..b21fa57d1a46bec42fee93ce0fc82e3b6eca5161 100644 (file)
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1116,6 +1116,8 @@ static void io_subchannel_verify(struct subchannel *sch)
        cdev = sch_get_cdev(sch);
        if (cdev)
                dev_fsm_event(cdev, DEV_EVENT_VERIFY);
+       else
+               css_schedule_eval(sch->schid);
 }
 
 static void io_subchannel_terminate_path(struct subchannel *sch, u8 mask)