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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
commit 30baa4a96b
3 changed files with 12 additions and 8 deletions
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