diff options
Diffstat (limited to 'drivers/s390/block/dasd.c')
| -rw-r--r-- | drivers/s390/block/dasd.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 5df05f26b7d9..329db997ee66 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -1660,6 +1660,14 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm, device->discipline->check_for_device_change(device, cqr, irb); dasd_put_device(device); } + + /* check for for attention message */ + if (scsw_dstat(&irb->scsw) & DEV_STAT_ATTENTION) { + device = dasd_device_from_cdev_locked(cdev); + device->discipline->check_attention(device, irb->esw.esw1.lpum); + dasd_put_device(device); + } + if (!cqr) return; @@ -2261,8 +2269,8 @@ static inline int _wait_for_wakeup_queue(struct list_head *ccw_queue) static int _dasd_sleep_on_queue(struct list_head *ccw_queue, int interruptible) { struct dasd_device *device; - int rc; struct dasd_ccw_req *cqr, *n; + int rc; retry: list_for_each_entry_safe(cqr, n, ccw_queue, blocklist) { @@ -2310,21 +2318,26 @@ retry: /* * for alias devices simplify error recovery and * return to upper layer + * do not skip ERP requests */ - if (cqr->startdev != cqr->basedev && + if (cqr->startdev != cqr->basedev && !cqr->refers && (cqr->status == DASD_CQR_TERMINATED || cqr->status == DASD_CQR_NEED_ERP)) return -EAGAIN; - else { - /* normal recovery for basedev IO */ - if (__dasd_sleep_on_erp(cqr)) { - if (!cqr->status == DASD_CQR_TERMINATED && - !cqr->status == DASD_CQR_NEED_ERP) - break; - rc = 1; - } + + /* normal recovery for basedev IO */ + if (__dasd_sleep_on_erp(cqr)) { + goto retry; + /* remember that ERP was needed */ + rc = 1; + /* skip processing for active cqr */ + if (cqr->status != DASD_CQR_TERMINATED && + cqr->status != DASD_CQR_NEED_ERP) + break; } } + + /* start ERP requests in upper loop */ if (rc) goto retry; |