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| author | Stefan Haberland <stefan.haberland@de.ibm.com> | 2015-10-23 13:10:51 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-11-03 16:40:47 +0300 |
| commit | ccc0e7dc708ce1bd2e1c4a2b6a180ae7459374de (patch) | |
| tree | b8e471827acaa5bae09f31b55c82ecb28f6d324a /drivers/s390/block/dasd_eckd.c | |
| parent | 251afd69e3328653bae4a8ca09700971ca4000c5 (diff) | |
| download | linux-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/dasd_eckd.c')
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 7 |
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 |