Vineeth Vijayan 9e9590f5e0 s390/cio: Do not unregister the subchannel based on DNV ...

[ Upstream commit 8c58a22968 ]

Starting with commit 2297791c92 ("s390/cio: dont unregister
subchannel from child-drivers"), CIO does not unregister subchannels
when the attached device is invalid or unavailable. Instead, it
allows subchannels to exist without a connected device. However, if
the DNV value is 0, such as, when all the CHPIDs of a subchannel are
configured in standby state, the subchannel is unregistered, which
contradicts the current subchannel specification.

Update the logic so that subchannels are not unregistered based
on the DNV value. Also update the SCHIB information even if the
DNV bit is zero.

Suggested-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Fixes: 2297791c92 ("s390/cio: dont unregister subchannel from child-drivers")
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-12-05 14:01:11 +01:00

..

block

s390/dasd: fix error recovery leading to data corruption on ESE devices

2024-08-12 10:31:08 -06:00

char

s390/sclp_vt220: Convert newlines to CRLF instead of LFCR

2024-10-16 11:32:32 +02:00

cio

s390/cio: Do not unregister the subchannel based on DNV

2024-12-05 14:01:11 +01:00

crypto

s390/pkey_pckmo: Return with success for valid protected key types

2024-10-16 11:32:32 +02:00

net

net: Add struct kernel_ethtool_ts_info

2024-07-15 08:02:26 -07:00

scsi

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virtio

s390/virtio_ccw: Fix dma_parm pointer not set up

2024-12-05 14:01:10 +01:00

Makefile

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