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path: root/drivers/s390/block/dasd.c
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Diffstat (limited to 'drivers/s390/block/dasd.c')
-rw-r--r--drivers/s390/block/dasd.c33
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;