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media: pvrusb2: fix pvr2_stream_callback casts

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clang-16 complains about a control flow integrity (KCFI) issue in pvrusb2,
which casts three different prototypes into pvr2_stream_callback:

drivers/media/usb/pvrusb2/pvrusb2-v4l2.c:1070:30: error: cast from 'void (*)(struct pvr2_v4l2_fh *)' to 'pvr2_stream_callback' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
 1070 |         pvr2_stream_set_callback(sp,(pvr2_stream_callback)pvr2_v4l2_notify,fh);
      |                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/usb/pvrusb2/pvrusb2-context.c:110:6: error: cast from 'void (*)(struct pvr2_context *)' to 'void (*)(void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
  110 |                                         (void (*)(void *))pvr2_context_notify,
      |                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/usb/pvrusb2/pvrusb2-dvb.c:152:6: error: cast from 'void (*)(struct pvr2_dvb_adapter *)' to 'pvr2_stream_callback' (aka 'void (*)(void *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
  152 |                                  (pvr2_stream_callback) pvr2_dvb_notify, adap);
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Change the functions to actually take a void* argument so the cast is no longer
needed.

Fixes: bb8ce9d914 ("V4L/DVB (7682): pvrusb2-dvb: finish up stream & buffer handling")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Arnd Bergmann 2024-02-13 11:04:27 +01:00 committed by Hans Verkuil
parent 3de49ae81c
commit 30baa4a96b
3 changed files with 12 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/media/usb/pvrusb2/pvrusb2-context.c
View file

@ -90,8 +90,10 @@ static void pvr2_context_destroy(struct pvr2_context *mp)
}
static void pvr2_context_notify(struct pvr2_context *mp)
static void pvr2_context_notify(void *ptr)
{
struct pvr2_context *mp = ptr;
pvr2_context_set_notify(mp,!0);
}
@ -106,9 +108,7 @@ static void pvr2_context_check(struct pvr2_context *mp)
pvr2_trace(PVR2_TRACE_CTXT,
"pvr2_context %p (initialize)", mp);
/* Finish hardware initialization */
if (pvr2_hdw_initialize(mp->hdw,
(void (*)(void *))pvr2_context_notify,
mp)) {
if (pvr2_hdw_initialize(mp->hdw, pvr2_context_notify, mp)) {
mp->video_stream.stream =
pvr2_hdw_get_video_stream(mp->hdw);
/* Trigger interface initialization. By doing this

6
drivers/media/usb/pvrusb2/pvrusb2-dvb.c
View file

@ -84,8 +84,10 @@ static int pvr2_dvb_feed_thread(void *data)
return stat;
}
static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap)
static void pvr2_dvb_notify(void *ptr)
{
struct pvr2_dvb_adapter *adap = ptr;
wake_up(&adap->buffer_wait_data);
}
@ -145,7 +147,7 @@ static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
}
pvr2_stream_set_callback(pvr->video_stream.stream,
(pvr2_stream_callback) pvr2_dvb_notify, adap);
pvr2_dvb_notify, adap);
ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
if (ret < 0) return ret;

6
drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
View file

@ -1033,8 +1033,10 @@ static int pvr2_v4l2_open(struct file *file)
}
static void pvr2_v4l2_notify(struct pvr2_v4l2_fh *fhp)
static void pvr2_v4l2_notify(void *ptr)
{
struct pvr2_v4l2_fh *fhp = ptr;
wake_up(&fhp->wait_data);
}
@ -1067,7 +1069,7 @@ static int pvr2_v4l2_iosetup(struct pvr2_v4l2_fh *fh)
hdw = fh->channel.mc_head->hdw;
sp = fh->pdi->stream->stream;
pvr2_stream_set_callback(sp,(pvr2_stream_callback)pvr2_v4l2_notify,fh);
pvr2_stream_set_callback(sp, pvr2_v4l2_notify, fh);
pvr2_hdw_set_stream_type(hdw,fh->pdi->config);
if ((ret = pvr2_hdw_set_streaming(hdw,!0)) < 0) return ret;
return pvr2_ioread_set_enabled(fh->rhp,!0);