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| author | Stefan Haberland <sth@linux.ibm.com> | 2021-10-20 13:51:24 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-20 08:10:42 -0600 |
| commit | a8e5d491dfc184c6b78cbb7f44107b01229c9df2 (patch) | |
| tree | bdb8990ae385ce27572692258955e79071fc3a95 /drivers/s390/block/dasd.c | |
| parent | 9dffede0115e96d0ff0a07e4382569a9c6dba735 (diff) | |
| download | linux-stable-a8e5d491dfc184c6b78cbb7f44107b01229c9df2.tar.gz linux-stable-a8e5d491dfc184c6b78cbb7f44107b01229c9df2.tar.bz2 linux-stable-a8e5d491dfc184c6b78cbb7f44107b01229c9df2.zip | |
s390/dasd: fix possibly missed path verification
__dasd_device_check_path_events() calls the discipline path event handler.
This handler can leave the 'to be verified pathmask' populated for an
additional verification.
There is a race window where the worker has finished before
dasd_path_clear_all_verify() is called which resets the tbvpm.
Due to this there could be outstanding path verifications missed.
Fix by clearing the pathmasks before calling the handler and add them
again in case of an error.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20211020115124.1735254-8-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index e34c6cc61983..8e87a31e329d 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -2077,12 +2077,15 @@ static void __dasd_device_check_path_events(struct dasd_device *device) if (device->stopped & ~(DASD_STOPPED_DC_WAIT)) return; + + dasd_path_clear_all_verify(device); + dasd_path_clear_all_fcsec(device); + rc = device->discipline->pe_handler(device, tbvpm, fcsecpm); if (rc) { + dasd_path_add_tbvpm(device, tbvpm); + dasd_path_add_fcsecpm(device, fcsecpm); dasd_device_set_timer(device, 50); - } else { - dasd_path_clear_all_verify(device); - dasd_path_clear_all_fcsec(device); } }; |