V4L/DVB (9299): cx18: Don't mask many real init error codes by mapping them to ENOMEM

Changes to let error return codes bubble up to the user visible
error message on card initialization.  A number of them were being remapped to
ENOMEM when no memory or array resource shortage existed.  That hampered
diagnosis of user trouble reports.

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

1 files changed, 22 insertions, 14 deletions

diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c
index 0c8e7542cf60..e5ff7705b7a1 100644
--- a/drivers/media/video/cx18/cx18-streams.c
+++ b/drivers/media/video/cx18/cx18-streams.c
@@ -200,16 +200,18 @@ static int cx18_prep_dev(struct cx18 *cx, int type)
 /* Initialize v4l2 variables and register v4l2 devices */
 int cx18_streams_setup(struct cx18 *cx)
 {
-        int type;
+        int type, ret;
 
         /* Setup V4L2 Devices */
         for (type = 0; type < CX18_MAX_STREAMS; type++) {
                 /* Prepare device */
-                if (cx18_prep_dev(cx, type))
+                ret = cx18_prep_dev(cx, type);
+                if (ret < 0)
                         break;
 
                 /* Allocate Stream */
-                if (cx18_stream_alloc(&cx->streams[type]))
+                ret = cx18_stream_alloc(&cx->streams[type]);
+                if (ret < 0)
                         break;
         }
         if (type == CX18_MAX_STREAMS)
@@ -217,14 +219,14 @@ int cx18_streams_setup(struct cx18 *cx)
 
         /* One or more streams could not be initialized. Clean 'em all up. */
         cx18_streams_cleanup(cx, 0);
-        return -ENOMEM;
+        return ret;
 }
 
 static int cx18_reg_dev(struct cx18 *cx, int type)
 {
         struct cx18_stream *s = &cx->streams[type];
         int vfl_type = cx18_stream_info[type].vfl_type;
-        int num;
+        int num, ret;
 
         /* TODO: Shouldn't this be a VFL_TYPE_TRANSPORT or something?
          * We need a VFL_TYPE_TS defined.
@@ -233,9 +235,10 @@ static int cx18_reg_dev(struct cx18 *cx, int type)
                 /* just return if no DVB is supported */
                 if ((cx->card->hw_all & CX18_HW_DVB) == 0)
                         return 0;
-                if (cx18_dvb_register(s) < 0) {
+                ret = cx18_dvb_register(s);
+                if (ret < 0) {
                         CX18_ERR("DVB failed to register\n");
-                        return -EINVAL;
+                        return ret;
                 }
         }
 
@@ -252,12 +255,13 @@ static int cx18_reg_dev(struct cx18 *cx, int type)
         }
 
         /* Register device. First try the desired minor, then any free one. */
-        if (video_register_device(s->v4l2dev, vfl_type, num)) {
+        ret = video_register_device(s->v4l2dev, vfl_type, num);
+        if (ret < 0) {
                 CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
                         s->name, num);
                 video_device_release(s->v4l2dev);
                 s->v4l2dev = NULL;
-                return -ENOMEM;
+                return ret;
         }
         num = s->v4l2dev->num;
 
@@ -290,18 +294,22 @@ static int cx18_reg_dev(struct cx18 *cx, int type)
 int cx18_streams_register(struct cx18 *cx)
 {
         int type;
-        int err = 0;
+        int err;
+        int ret = 0;
 
         /* Register V4L2 devices */
-        for (type = 0; type < CX18_MAX_STREAMS; type++)
-                err |= cx18_reg_dev(cx, type);
+        for (type = 0; type < CX18_MAX_STREAMS; type++) {
+                err = cx18_reg_dev(cx, type);
+                if (err && ret == 0)
+                        ret = err;
+        }
 
-        if (err == 0)
+        if (ret == 0)
                 return 0;
 
         /* One or more streams could not be initialized. Clean 'em all up. */
         cx18_streams_cleanup(cx, 1);
-        return -ENOMEM;
+        return ret;
 }
 
 /* Unregister v4l2 devices */