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path: root/drivers/media/video/cpia_pp.c
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Diffstat (limited to 'drivers/media/video/cpia_pp.c')
-rw-r--r--drivers/media/video/cpia_pp.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/media/video/cpia_pp.c b/drivers/media/video/cpia_pp.c
index 41f4b8d17559..b12cec94f4cc 100644
--- a/drivers/media/video/cpia_pp.c
+++ b/drivers/media/video/cpia_pp.c
@@ -82,6 +82,8 @@ struct pp_cam_entry {
82 struct pardevice *pdev; 82 struct pardevice *pdev;
83 struct parport *port; 83 struct parport *port;
84 struct work_struct cb_task; 84 struct work_struct cb_task;
85 void (*cb_func)(void *cbdata);
86 void *cb_data;
85 int open_count; 87 int open_count;
86 wait_queue_head_t wq_stream; 88 wait_queue_head_t wq_stream;
87 /* image state flags */ 89 /* image state flags */
@@ -130,6 +132,20 @@ static void cpia_parport_disable_irq( struct parport *port ) {
130#define PARPORT_CHUNK_SIZE PAGE_SIZE 132#define PARPORT_CHUNK_SIZE PAGE_SIZE
131 133
132 134
135static void cpia_pp_run_callback(struct work_struct *work)
136{
137 void (*cb_func)(void *cbdata);
138 void *cb_data;
139 struct pp_cam_entry *cam;
140
141 cam = container_of(work, struct pp_cam_entry, cb_task);
142 cb_func = cam->cb_func;
143 cb_data = cam->cb_data;
144 work_release(work);
145
146 cb_func(cb_data);
147}
148
133/**************************************************************************** 149/****************************************************************************
134 * 150 *
135 * CPiA-specific low-level parport functions for nibble uploads 151 * CPiA-specific low-level parport functions for nibble uploads
@@ -664,7 +680,9 @@ static int cpia_pp_registerCallback(void *privdata, void (*cb)(void *cbdata), vo
664 int retval = 0; 680 int retval = 0;
665 681
666 if(cam->port->irq != PARPORT_IRQ_NONE) { 682 if(cam->port->irq != PARPORT_IRQ_NONE) {
667 INIT_WORK(&cam->cb_task, cb, cbdata); 683 cam->cb_func = cb;
684 cam->cb_data = cbdata;
685 INIT_WORK_NAR(&cam->cb_task, cpia_pp_run_callback);
668 } else { 686 } else {
669 retval = -1; 687 retval = -1;
670 } 688 }