s390: free skbs in finite amount of time in qeth

Free sent skbs in some finite amount of time. Affected are
asynchronous queue of Hipersockets devices and the output
queues of all eth-devices respectively.

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

2 files changed, 30 insertions, 11 deletions

diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index cba64e4cfcd4..f770018fe1d5 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -996,18 +996,25 @@ __qdio_outbound_processing(struct qdio_q *q)
         if (qdio_has_outbound_q_moved(q))
                 qdio_kick_outbound_handler(q);
 
-        if (q->is_iqdio_q) {
+        if (q->queue_type == QDIO_ZFCP_QFMT) {
+                if ((!q->hydra_gives_outbound_pcis) &&
+                    (!qdio_is_outbound_q_done(q)))
+                        qdio_mark_q(q);
+        }
+        else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
+                 (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
                 /* 
-                 * for asynchronous queues, we better check, if the sent
-                 * buffer is already switched from PRIMED to EMPTY.
+                 * make sure buffer switch from PRIMED to EMPTY is noticed
+                 * and outbound_handler is called
                  */
-                if ((q->queue_type == QDIO_IQDIO_QFMT_ASYNCH) &&
-                    !qdio_is_outbound_q_done(q))
-                        qdio_mark_q(q);
-
-        } else if (!q->hydra_gives_outbound_pcis)
-                if (!qdio_is_outbound_q_done(q))
-                        qdio_mark_q(q);
+                if (qdio_is_outbound_q_done(q)) {
+                        del_timer(&q->timer);
+                } else {
+                        if (!timer_pending(&q->timer))
+                                mod_timer(&q->timer, jiffies +
+                                          QDIO_FORCE_CHECK_TIMEOUT);
+                }
+        }
 
         qdio_release_q(q);
 }
@@ -1826,6 +1833,7 @@ qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
                 q->int_parm=int_parm;
                 q->is_input_q=0;
+                q->is_pci_out = 0;
                 q->schid = irq_ptr->schid;
                 q->cdev = cdev;
                 q->irq_ptr = irq_ptr;
@@ -1838,6 +1846,10 @@ qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
                 q->tasklet.data=(unsigned long)q;
                 q->tasklet.func=(void(*)(unsigned long))
                         &qdio_outbound_processing;
+                q->timer.function=(void(*)(unsigned long))
+                        &qdio_outbound_processing;
+                q->timer.data = (long)q;
+                init_timer(&q->timer);
 
                 atomic_set(&q->busy_siga_counter,0);
                 q->timing.busy_start=0;
@@ -2635,6 +2647,7 @@ qdio_shutdown(struct ccw_device *cdev, int how)
 
         for (i=0;i<irq_ptr->no_output_qs;i++) {
                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
+                del_timer(&irq_ptr->output_qs[i]->timer);
                 wait_event_interruptible_timeout(cdev->private->wait_q,
                                                  !atomic_read(&irq_ptr->
                                                               output_qs[i]->
@@ -3458,6 +3471,10 @@ do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
                 return;
         }
+        if (callflags & QDIO_FLAG_PCI_OUT)
+                q->is_pci_out = 1;
+        else
+                q->is_pci_out = 0;
         if (q->is_iqdio_q) {
                 /* one siga for every sbal */
                 while (count--)
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 2895392eaae4..6d7aad18f6f0 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -60,6 +60,7 @@
 #define QDIO_ACTIVATE_TIMEOUT ((5*HZ)>>10)
 #define QDIO_CLEANUP_CLEAR_TIMEOUT (20*HZ)
 #define QDIO_CLEANUP_HALT_TIMEOUT (10*HZ)
+#define QDIO_FORCE_CHECK_TIMEOUT (10*HZ)
 
 enum qdio_irq_states {
         QDIO_IRQ_STATE_INACTIVE,
@@ -511,8 +512,8 @@ struct qdio_q {
 
         void *irq_ptr;
 
-#ifdef QDIO_USE_TIMERS_FOR_POLLING
         struct timer_list timer;
+#ifdef QDIO_USE_TIMERS_FOR_POLLING
         atomic_t timer_already_set;
         spinlock_t timer_lock;
 #else /* QDIO_USE_TIMERS_FOR_POLLING */
@@ -558,6 +559,7 @@ struct qdio_q {
         } timing;
         atomic_t busy_siga_counter;
         unsigned int queue_type;
+        unsigned int is_pci_out;
 
         /* leave this member at the end. won't be cleared in qdio_fill_qs */
         struct slib *slib; /* a page is allocated under this pointer,