linux_dsm_epyc7002/drivers/s390
Peter Oberparleiter 9955e8d15f s390/cio: Fix missing subchannels after CHPID configure on
Performing a Channel-Path configure on operation on a Channel-Path ID
(CHPID) does not trigger a scan for subchannels that might have become
available through that CHPID. As a result, some subchannels and
associated I/O devices might be missing. Fix this by adding the missing
scan.

This problem was introduced by commit c820de39, "[S390] cio: Rework
css driver.", but wasn't noticed earlier because the machine usually
also generates a Channel-Report-Word when the first CHPID of a
subchannel is configured on, resulting in a separate scan for that
subchannel. The problem only becomes apparent when this first CHPID is
not working properly and additional working CHPIDs are subsequently
configured on without any effect on the availability of the affected
subchannel.

Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-21 08:48:33 +01:00
..
block Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block 2014-01-30 11:19:05 -08:00
char s390/hypfs: add interface for diagnose 0x304 2014-01-24 09:40:59 +01:00
cio s390/cio: Fix missing subchannels after CHPID configure on 2014-02-21 08:48:33 +01:00
crypto s390/zcrypt: additional check to avoid overflow in msg-type 6 requests 2014-02-12 09:49:45 +01:00
kvm KVM: s390: virtio-ccw: Handle command rejects. 2014-01-17 13:12:22 +01:00
net qeth: fix build of s390 allmodconfig 2014-01-29 00:43:33 -08:00
scsi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2013-11-15 16:47:22 -08:00
Makefile [S390] split/move machine check handler code 2009-03-26 15:24:10 +01:00