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authorSteffen Maier <maier@linux.vnet.ibm.com>2011-12-27 14:27:26 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-12-27 14:27:14 +0400
commite58b0d902f7c7c407bae9c8bc8d90fa1d06184c5 (patch)
tree44aa32d0a7273040b3358623bddc62ca102839c1 /drivers/s390/cio
parent913021433997936822e33a62decfb1914de9bc51 (diff)
downloadlinux-e58b0d902f7c7c407bae9c8bc8d90fa1d06184c5.tar.xz
[S390] qdio: fix kernel panic for zfcp 31-bit
The queue_start_poll function pointer field in struct qdio_initialize had to change its type and become a vector of function pointers to support asynchronous delivery of storage blocks so rename the field to make the type change explicit and ensure no other user of qdio tries to use the field the old way. During setting up the qdio queues, only dereference vector elements if the vector is actually allocated. Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: Einar Lueck <elelueck@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/qdio_setup.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 74bb1a088261..452989a7ec13 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -177,7 +177,8 @@ static void setup_queues(struct qdio_irq *irq_ptr,
setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i);
q->is_input_q = 1;
- q->u.in.queue_start_poll = qdio_init->queue_start_poll[i];
+ q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ?
+ qdio_init->queue_start_poll_array[i] : NULL;
setup_storage_lists(q, irq_ptr, input_sbal_array, i);
input_sbal_array += QDIO_MAX_BUFFERS_PER_Q;