s390/cio: dont unregister subchannel from child-drivers

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The devices owned by the parent-driver (css) was getting unregistered
from the io-subchannel driver is clearly a layering violation.
Remove the subchannel unregistration from the child-drivers.

This also means, if the device connected to the subchannel is not
operational, or not accessible, the subchannel will not be unregistered.
Instead the CIO layer will allow valid subchannels without any operational
devices in sysfs. And the userspace tooling might need to be modified to
optimally handle this new situation.

Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

...

This commit is contained in:

Vineeth Vijayan 2021-04-25 10:41:59 +02:00 • committed by Heiko Carstens

parent c7a5238ef6

commit 2297791c92

2 changed files with 8 additions and 18 deletions

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5

drivers/s390/cio/blacklist.c

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21

drivers/s390/cio/device.c

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