s390/cio: include subchannels without devices also for evaluation
authorVineeth Vijayan <vneethv@linux.ibm.com>
Tue, 2 May 2023 09:12:42 +0000 (11:12 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 24 May 2023 16:32:46 +0000 (17:32 +0100)
commitc9abef1e07ff38f7ea3dfb62f141e111c54aa7e2
tree974af504724a64ba11d588114aae669f76d3697d
parentf215b62f59be081dd77201273128d44a0c573075
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>
drivers/s390/cio/device.c