V4L/DVB (5048): Pvrusb2: v4l2 API implementation frequency tweaks

[linux-2.6-omap-h63xx.git] / drivers / media / video / pvrusb2 / pvrusb2-ioread.c

diff --git a/drivers/media/video/pvrusb2/pvrusb2-ioread.c b/drivers/media/video/pvrusb2/pvrusb2-ioread.c
index 49da062e32710067369f85e1325b09e09202f264..b71f9a961f8ac20461df5043b5487741607128c0 100644 (file)
--- a/drivers/media/video/pvrusb2/pvrusb2-ioread.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-ioread.c
@@ -54,7 +54,7 @@ static int pvr2_ioread_init(struct pvr2_ioread *cp)
 {
        unsigned int idx;
 
-       cp->stream = 0;
+       cp->stream = NULL;
        mutex_init(&cp->mutex);
 
        for (idx = 0; idx < BUFFER_COUNT; idx++) {
@@ -77,7 +77,7 @@ static void pvr2_ioread_done(struct pvr2_ioread *cp)
 {
        unsigned int idx;
 
-       pvr2_ioread_setup(cp,0);
+       pvr2_ioread_setup(cp,NULL);
        for (idx = 0; idx < BUFFER_COUNT; idx++) {
                if (!(cp->buffer_storage[idx])) continue;
                kfree(cp->buffer_storage[idx]);
@@ -88,12 +88,12 @@ struct pvr2_ioread *pvr2_ioread_create(void)
 {
        struct pvr2_ioread *cp;
        cp = kmalloc(sizeof(*cp),GFP_KERNEL);
-       if (!cp) return 0;
+       if (!cp) return NULL;
        pvr2_trace(PVR2_TRACE_STRUCT,"pvr2_ioread_create id=%p",cp);
        memset(cp,0,sizeof(*cp));
        if (pvr2_ioread_init(cp) < 0) {
                kfree(cp);
-               return 0;
+               return NULL;
        }
        return cp;
 }
@@ -105,7 +105,7 @@ void pvr2_ioread_destroy(struct pvr2_ioread *cp)
        pvr2_trace(PVR2_TRACE_STRUCT,"pvr2_ioread_destroy id=%p",cp);
        if (cp->sync_key_ptr) {
                kfree(cp->sync_key_ptr);
-               cp->sync_key_ptr = 0;
+               cp->sync_key_ptr = NULL;
        }
        kfree(cp);
 }
@@ -124,7 +124,7 @@ void pvr2_ioread_set_sync_key(struct pvr2_ioread *cp,
        if (sync_key_len != cp->sync_key_len) {
                if (cp->sync_key_ptr) {
                        kfree(cp->sync_key_ptr);
-                       cp->sync_key_ptr = 0;
+                       cp->sync_key_ptr = NULL;
                }
                cp->sync_key_len = 0;
                if (sync_key_len) {
@@ -144,8 +144,8 @@ static void pvr2_ioread_stop(struct pvr2_ioread *cp)
        pvr2_trace(PVR2_TRACE_START_STOP,
                   "/*---TRACE_READ---*/ pvr2_ioread_stop id=%p",cp);
        pvr2_stream_kill(cp->stream);
-       cp->c_buf = 0;
-       cp->c_data_ptr = 0;
+       cp->c_buf = NULL;
+       cp->c_data_ptr = NULL;
        cp->c_data_len = 0;
        cp->c_data_offs = 0;
        cp->enabled = 0;
@@ -179,8 +179,8 @@ static int pvr2_ioread_start(struct pvr2_ioread *cp)
                }
        }
        cp->enabled = !0;
-       cp->c_buf = 0;
-       cp->c_data_ptr = 0;
+       cp->c_buf = NULL;
+       cp->c_data_ptr = NULL;
        cp->c_data_len = 0;
        cp->c_data_offs = 0;
        cp->stream_running = 0;
@@ -213,8 +213,10 @@ int pvr2_ioread_setup(struct pvr2_ioread *cp,struct pvr2_stream *sp)
                                   " pvr2_ioread_setup (tear-down) id=%p",cp);
                        pvr2_ioread_stop(cp);
                        pvr2_stream_kill(cp->stream);
-                       pvr2_stream_set_buffer_count(cp->stream,0);
-                       cp->stream = 0;
+                       if (pvr2_stream_get_buffer_count(cp->stream)) {
+                               pvr2_stream_set_buffer_count(cp->stream,0);
+                       }
+                       cp->stream = NULL;
                }
                if (sp) {
                        pvr2_trace(PVR2_TRACE_START_STOP,
@@ -251,12 +253,7 @@ int pvr2_ioread_set_enabled(struct pvr2_ioread *cp,int fl)
        return ret;
 }
 
-int pvr2_ioread_get_enabled(struct pvr2_ioread *cp)
-{
-       return cp->enabled != 0;
-}
-
-int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
+static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
 {
        int stat;
 
@@ -274,8 +271,8 @@ int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
                                pvr2_ioread_stop(cp);
                                return 0;
                        }
-                       cp->c_buf = 0;
-                       cp->c_data_ptr = 0;
+                       cp->c_buf = NULL;
+                       cp->c_data_ptr = NULL;
                        cp->c_data_len = 0;
                        cp->c_data_offs = 0;
                }
@@ -307,7 +304,7 @@ int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
        return !0;
 }
 
-void pvr2_ioread_filter(struct pvr2_ioread *cp)
+static void pvr2_ioread_filter(struct pvr2_ioread *cp)
 {
        unsigned int idx;
        if (!cp->enabled) return;