linux-kernel - [PATCH v2 2/3] media: usb: pvrusb2: Fix Wcast-function-type-strict warnings

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Message-Id: <20240226-fix-clang-warnings-v2-2-fa1bc931d17e@chromium.org>
Date: Mon, 26 Feb 2024 17:32:45 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <ndesaulniers@...gle.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Mike Isely <isely@...ox.com>, Tiffany Lin <tiffany.lin@...iatek.com>, 
 Andrew-CT Chen <andrew-ct.chen@...iatek.com>, 
 Yunfei Dong <yunfei.dong@...iatek.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-remoteproc@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 2/3] media: usb: pvrusb2: Fix Wcast-function-type-strict
 warnings

Building with LLVM=1 throws the following warning:
drivers/media/usb/pvrusb2/pvrusb2-context.c:110:6: warning: cast from 'void (*)(struct pvr2_context *)' to 'void (*)(void *)' converts to incompatible function type [-Wcast-function-type-strict]
drivers/media/usb/pvrusb2/pvrusb2-v4l2.c:1070:30: warning: cast from 'void (*)(struct pvr2_v4l2_fh *)' to 'pvr2_stream_callback' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict] drivers/media/usb/pvrusb2/pvrusb2-dvb.c:152:6: warning: cast from 'void (*)(struct pvr2_dvb_adapter *)' to 'pvr2_stream_callback' (aka 'void (*)(void *)') converts to incompatible function type [-Wcast-function-type-strict]

Reviewed-by: Nathan Chancellor <nathan@...nel.org>
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/usb/pvrusb2/pvrusb2-context.c | 5 +++--
 drivers/media/usb/pvrusb2/pvrusb2-dvb.c     | 7 ++++---
 drivers/media/usb/pvrusb2/pvrusb2-v4l2.c    | 7 ++++---
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-context.c b/drivers/media/usb/pvrusb2/pvrusb2-context.c
index 1764674de98bc..16edabda191c4 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-context.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-context.c
@@ -90,8 +90,9 @@ static void pvr2_context_destroy(struct pvr2_context *mp)
 }
 
 
-static void pvr2_context_notify(struct pvr2_context *mp)
+static void pvr2_context_notify(void *data)
 {
+	struct pvr2_context *mp = data;
 	pvr2_context_set_notify(mp,!0);
 }
 
@@ -107,7 +108,7 @@ static void pvr2_context_check(struct pvr2_context *mp)
 			   "pvr2_context %p (initialize)", mp);
 		/* Finish hardware initialization */
 		if (pvr2_hdw_initialize(mp->hdw,
-					(void (*)(void *))pvr2_context_notify,
+					pvr2_context_notify,
 					mp)) {
 			mp->video_stream.stream =
 				pvr2_hdw_get_video_stream(mp->hdw);
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
index 26811efe0fb58..8b9f1a09bd53d 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-dvb.c
@@ -88,8 +88,9 @@ 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 *data)
 {
+	struct pvr2_dvb_adapter *adap = data;
 	wake_up(&adap->buffer_wait_data);
 }
 
@@ -148,8 +149,8 @@ static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
 		if (!(adap->buffer_storage[idx])) return -ENOMEM;
 	}
 
-	pvr2_stream_set_callback(pvr->video_stream.stream,
-				 (pvr2_stream_callback) pvr2_dvb_notify, adap);
+	pvr2_stream_set_callback(pvr->video_stream.stream, pvr2_dvb_notify,
+				 adap);
 
 	ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
 	if (ret < 0) return ret;
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
index c04ab7258d645..590f80949bbfc 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
@@ -1032,9 +1032,10 @@ static int pvr2_v4l2_open(struct file *file)
 	return 0;
 }
 
-
-static void pvr2_v4l2_notify(struct pvr2_v4l2_fh *fhp)
+static void pvr2_v4l2_notify(void *data)
 {
+	struct pvr2_v4l2_fh *fhp = data;
+
 	wake_up(&fhp->wait_data);
 }
 
@@ -1067,7 +1068,7 @@ 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);

-- 
2.44.0.rc0.258.g7320e95886-goog