Removed old xen patchset

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.25 / patches.arch / s390-11-07-qdio_kill_tasklets.patch

diff --git a/src/patches/suse-2.6.27.25/patches.arch/s390-11-07-qdio_kill_tasklets.patch b/src/patches/suse-2.6.27.25/patches.arch/s390-11-07-qdio_kill_tasklets.patch
deleted file mode 100644 (file)
index a21d92d..0000000
--- a/src/patches/suse-2.6.27.25/patches.arch/s390-11-07-qdio_kill_tasklets.patch
+++ /dev/null
@@ -1,159 +0,0 @@
-From: Gerald Schaefer <geraldsc@de.ibm.com>
-Subject: qdio: proper kill of qdio tasklets
-References: bnc#484767,LTC#52206
-
-Symptom:     kernel BUG at kernel/softirq.c:392!
-Problem:     The queue tasklets were stopped with tasklet_disable. Although
-             tasklet_disable prevents the tasklet from beeing executed it is
-             still possible that a tasklet is scheduled on a CPU at that point.
-             A following qdio_establish calls tasklet_init which clears the
-             tasklet count and the tasklet state leading to the oops.
-Solution:    Use tasklet_kill instead of tasklet_disbale. Since
-             tasklet_schedule must not be called after tasklet_kill use the
-             QDIO_IRQ_STATE_STOPPED to inidicate that a queue is going down
-             and prevent further tasklet schedules in that case.
-
-Acked-by: John Jolly <jjolly@suse.de>
----
- drivers/s390/cio/qdio_main.c    |   35 ++++++++++++++++++++++++-----------
- drivers/s390/cio/qdio_thinint.c |    8 ++++----
- 2 files changed, 28 insertions(+), 15 deletions(-)
-
-Index: linux-sles11/drivers/s390/cio/qdio_main.c
-===================================================================
---- linux-sles11.orig/drivers/s390/cio/qdio_main.c
-+++ linux-sles11/drivers/s390/cio/qdio_main.c
-@@ -760,21 +760,17 @@ static void __qdio_outbound_processing(s
-       if (qdio_outbound_q_moved(q))
-               qdio_kick_outbound_handler(q);
- 
--      if (queue_type(q) == QDIO_ZFCP_QFMT) {
-+      if (queue_type(q) == QDIO_ZFCP_QFMT)
-               if (!pci_out_supported(q) && !qdio_outbound_q_done(q))
--                      tasklet_schedule(&q->tasklet);
--              return;
--      }
-+                      goto sched;
- 
-       /* bail out for HiperSockets unicast queues */
-       if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q))
-               return;
- 
-       if ((queue_type(q) == QDIO_IQDIO_QFMT) &&
--          (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) {
--              tasklet_schedule(&q->tasklet);
--              return;
--      }
-+          (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL)
-+              goto sched;
- 
-       if (q->u.out.pci_out_enabled)
-               return;
-@@ -792,6 +788,12 @@ static void __qdio_outbound_processing(s
-                       qdio_perf_stat_inc(&perf_stats.debug_tl_out_timer);
-               }
-       }
-+      return;
-+
-+sched:
-+      if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
-+              return;
-+      tasklet_schedule(&q->tasklet);
- }
- 
- /* outbound tasklet */
-@@ -804,6 +806,9 @@ void qdio_outbound_processing(unsigned l
- void qdio_outbound_timer(unsigned long data)
- {
-       struct qdio_q *q = (struct qdio_q *)data;
-+
-+      if (unlikely(q->irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
-+              return;
-       tasklet_schedule(&q->tasklet);
- }
- 
-@@ -845,6 +850,9 @@ static void qdio_int_handler_pci(struct 
-       int i;
-       struct qdio_q *q;
- 
-+      if (unlikely(irq_ptr->state == QDIO_IRQ_STATE_STOPPED))
-+              return;
-+
-       qdio_perf_stat_inc(&perf_stats.pci_int);
- 
-       for_each_input_queue(irq_ptr, q, i)
-@@ -1072,11 +1080,11 @@ static void qdio_shutdown_queues(struct 
-       int i;
- 
-       for_each_input_queue(irq_ptr, q, i)
--              tasklet_disable(&q->tasklet);
-+              tasklet_kill(&q->tasklet);
- 
-       for_each_output_queue(irq_ptr, q, i) {
--              tasklet_disable(&q->tasklet);
-               del_timer(&q->u.out.timer);
-+              tasklet_kill(&q->tasklet);
-       }
- }
- 
-@@ -1107,6 +1115,12 @@ int qdio_shutdown(struct ccw_device *cde
-               return 0;
-       }
- 
-+      /*
-+       * Indicate that the device is going down. Scheduling the queue
-+       * tasklets is forbidden from here on.
-+       */
-+      qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
-+
-       tiqdio_remove_input_queues(irq_ptr);
-       qdio_shutdown_queues(cdev);
-       qdio_shutdown_debug_entries(irq_ptr, cdev);
-@@ -1526,7 +1540,6 @@ static int handle_outbound(struct qdio_q
-               qdio_perf_stat_inc(&perf_stats.fast_requeue);
-       }
- out:
--      /* Fixme: could wait forever if called from process context */
-       tasklet_schedule(&q->tasklet);
-       return rc;
- }
-Index: linux-sles11/drivers/s390/cio/qdio_thinint.c
-===================================================================
---- linux-sles11.orig/drivers/s390/cio/qdio_thinint.c
-+++ linux-sles11/drivers/s390/cio/qdio_thinint.c
-@@ -101,7 +101,6 @@ void tiqdio_add_input_queues(struct qdio
-               list_add_rcu(&q->entry, &tiq_list);
-       mutex_unlock(&tiq_list_lock);
-       xchg(irq_ptr->dsci, 1);
--      tasklet_schedule(&tiqdio_tasklet);
- }
- 
- /*
-@@ -159,7 +158,6 @@ static void __tiqdio_inbound_processing(
-        */
-       qdio_check_outbound_after_thinint(q);
- 
--again:
-       if (!qdio_inbound_q_moved(q))
-               return;
- 
-@@ -167,7 +165,8 @@ again:
- 
-       if (!tiqdio_inbound_q_done(q)) {
-               qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop);
--              goto again;
-+              if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
-+                      tasklet_schedule(&q->tasklet);
-       }
- 
-       qdio_stop_polling(q);
-@@ -177,7 +176,8 @@ again:
-        */
-       if (!tiqdio_inbound_q_done(q)) {
-               qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop2);
--              goto again;
-+              if (likely(q->irq_ptr->state != QDIO_IRQ_STATE_STOPPED))
-+                      tasklet_schedule(&q->tasklet);
-       }
- }
-