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authorStefan Haberland <stefan.haberland@de.ibm.com>2015-10-23 13:10:51 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-11-03 16:40:47 +0300
commitccc0e7dc708ce1bd2e1c4a2b6a180ae7459374de (patch)
treeb8e471827acaa5bae09f31b55c82ecb28f6d324a /drivers/s390/block
parent251afd69e3328653bae4a8ca09700971ca4000c5 (diff)
downloadlinux-ccc0e7dc708ce1bd2e1c4a2b6a180ae7459374de.tar.xz
s390/dasd: fix disconnected device with valid path mask
Path verification is either done via dasd_eckd_read_conf() which is triggered during online processing and resume or via do_path_verification_work() which is triggered after path events. The dasd_eckd_read_conf() version added paths unconditionally and did not check if the path mask was empty. This led to devices having the disconnected stop flag set but a valid path mask. So they where not working although they had paths validated successfully. After a resume this state could even not be solved with additional paths added. Fix by checking for an empty path mask in dasd_eckd_read_conf() and clearing the device stop bits for a newly added channel path. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block')
-rw-r--r--drivers/s390/block/dasd_eckd.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 3d929abb52c7..9083247f55a8 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1171,7 +1171,12 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
path_data->ppm |= lpm;
break;
}
- path_data->opm |= lpm;
+ if (!path_data->opm) {
+ path_data->opm = lpm;
+ dasd_generic_path_operational(device);
+ } else {
+ path_data->opm |= lpm;
+ }
/*
* if the path is used
* it should not be in one of the negative lists