V4L/DVB (11619): cx18: Simplify the work handler for outgoing mailbox commands

Simplify the way outgoing work handler gets scheduled to send empty buffers
back to the firmware for use.  Also reduced the memory required for scheduling
this outgoing work, by using a single, per stream work object.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 10 insertions, 15 deletions

diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index 658cfbb1b97..f0006edc635 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -30,6 +30,7 @@
 #include "cx18-irq.h"
 #include "cx18-gpio.h"
 #include "cx18-firmware.h"
+#include "cx18-queue.h"
 #include "cx18-streams.h"
 #include "cx18-av-core.h"
 #include "cx18-scb.h"
@@ -580,13 +581,6 @@ static void __devinit cx18_init_in_work_orders(struct cx18 *cx)
         }
 }
 
-static void __devinit cx18_init_out_work_orders(struct cx18 *cx)
-{
-        int i;
-        for (i = 0; i < CX18_MAX_OUT_WORK_ORDERS; i++)
-                INIT_WORK(&cx->out_work_order[i].work, cx18_out_work_handler);
-}
-
 /* Precondition: the cx18 structure has been memset to 0. Only
    the dev and instance fields have been filled in.
    No assumptions on the card type may be made here (see cx18_init_struct2
@@ -613,7 +607,6 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
                 return ret;
         }
 
-        cx18_init_out_work_orders(cx);
         cx18_init_in_work_orders(cx);
 
         /* start counting open_id at 1 */
@@ -1103,6 +1096,14 @@ static void cx18_cancel_in_work_orders(struct cx18 *cx)
                 cancel_work_sync(&cx->in_work_order[i].work);
 }
 
+static void cx18_cancel_out_work_orders(struct cx18 *cx)
+{
+        int i;
+        for (i = 0; i < CX18_MAX_STREAMS; i++)
+                if (&cx->streams[i].video_dev != NULL)
+                        cancel_work_sync(&cx->streams[i].out_work_order);
+}
+
 static void cx18_remove(struct pci_dev *pci_dev)
 {
         struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev);
@@ -1121,13 +1122,7 @@ static void cx18_remove(struct pci_dev *pci_dev)
 
         /* Incoming work can cause outgoing work, so clean up incoming first */
         cx18_cancel_in_work_orders(cx);
-
-        /*
-         * An outgoing work order can have the only pointer to a dynamically
-         * allocated buffer, so we need to flush outgoing work and not just
-         * cancel it, so we don't lose the pointer and leak memory.
-         */
-        flush_workqueue(cx->out_work_queue);
+        cx18_cancel_out_work_orders(cx);
 
         /* Stop ack interrupts that may have been needed for work to finish */
         cx18_sw2_irq_disable(cx, IRQ_CPU_TO_EPU_ACK | IRQ_APU_TO_EPU_ACK);