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| author | Martin Petermann <martin@linux.vnet.ibm.com> | 2009-04-17 15:08:08 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-04-27 10:07:31 -0500 |
| commit | 048225e3f44f07c0f67e9665be0b4f18788de0eb (patch) | |
| tree | c2991262ffd4a2f989cc68d15298b5ab20b2638a /drivers/s390 | |
| parent | d81ad31c6cf4e318e6b94c959bd9a56ca440b279 (diff) | |
| download | linux-048225e3f44f07c0f67e9665be0b4f18788de0eb.tar.gz linux-048225e3f44f07c0f67e9665be0b4f18788de0eb.tar.bz2 linux-048225e3f44f07c0f67e9665be0b4f18788de0eb.zip | |
[SCSI] zfcp: remove unit will fail if add unit is not finished
On some hardware it can take some time to add a unit. If
some remove this unit during this process the remove will
fail.
Signed-off-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/scsi/zfcp_sysfs.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 9a3b8e261c0a..3e51e64d1108 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -254,12 +254,21 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, write_lock_irq(&zfcp_data.config_lock); unit = zfcp_get_unit_by_lun(port, fcp_lun); - if (unit && (atomic_read(&unit->refcount) == 0)) { - zfcp_unit_get(unit); - atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status); - list_move(&unit->list, &unit_remove_lh); - } else - unit = NULL; + if (unit) { + write_unlock_irq(&zfcp_data.config_lock); + /* wait for possible timeout during SCSI probe */ + flush_work(&unit->scsi_work); + write_lock_irq(&zfcp_data.config_lock); + + if (atomic_read(&unit->refcount) == 0) { + zfcp_unit_get(unit); + atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, + &unit->status); + list_move(&unit->list, &unit_remove_lh); + } else { + unit = NULL; + } + } write_unlock_irq(&zfcp_data.config_lock); |