firewire: cdev: shut down iso context before freeing the buffer
DMA must be halted before we DMA-unmap and free the DMA buffer. Since
we cannot rely on the client to stop the context before it closes the
fd, we have to reorder fw_iso_buffer_destroy vs. fw_iso_context_destroy.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-cdev.c b/drivers/firewire/fw-cdev.c
index 3d816a6..b93ad9c 100644
--- a/drivers/firewire/fw-cdev.c
+++ b/drivers/firewire/fw-cdev.c
@@ -1386,12 +1386,12 @@
list_del(&client->link);
mutex_unlock(&client->device->client_list_mutex);
- if (client->buffer.pages)
- fw_iso_buffer_destroy(&client->buffer, client->device->card);
-
if (client->iso_context)
fw_iso_context_destroy(client->iso_context);
+ if (client->buffer.pages)
+ fw_iso_buffer_destroy(&client->buffer, client->device->card);
+
/* Freeze client->resource_idr and client->event_list */
spin_lock_irq(&client->lock);
client->in_shutdown = true;