Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753824AbdGNJlY (ORCPT ); Fri, 14 Jul 2017 05:41:24 -0400 Received: from mout.kundenserver.de ([212.227.126.130]:61405 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751403AbdGNJlT (ORCPT ); Fri, 14 Jul 2017 05:41:19 -0400 From: Arnd Bergmann To: linux-kernel@vger.kernel.org, Mauro Carvalho Chehab , Hans Verkuil Cc: Greg Kroah-Hartman , Linus Torvalds , Tejun Heo , Guenter Roeck , linux-ide@vger.kernel.org, linux-media@vger.kernel.org, akpm@linux-foundation.org, dri-devel@lists.freedesktop.org, Arnd Bergmann , =?UTF-8?q?Niklas=20S=C3=B6derlund?= , Robert Jarzmik , Daeseok Youn , Alan Cox , adi-buildroot-devel@lists.sourceforge.net, linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devel@driverdev.osuosl.org Subject: [PATCH 14/14] [media] fix warning on v4l2_subdev_call() result interpreted as bool Date: Fri, 14 Jul 2017 11:36:56 +0200 Message-Id: <20170714093938.1469319-1-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 In-Reply-To: <20170714092540.1217397-1-arnd@arndb.de> References: <20170714092540.1217397-1-arnd@arndb.de> X-Provags-ID: V03:K0:ZN0AtT+AY2HEC2jE46WbE6DS5vUL4Ra+2quqPcll7d1KGTkNzg5 CQ0nz4RBGZRlE/EBHqz9ZboIucaEYvNKkFNRejIpzYRew4DzosKuhVCOpMyim5AW6yZ1Pi6 G0U5A51PklP7ObyDqzI3T6oA3Px47JP5dS1cQvLabl4LuBrfe0biG5eVeeXe30xSaS6tEJn ySBuG3KDX6uGyKeHXdkbQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:QwMFRpSGul4=:TMQJd1yE8jdAE65dt7orl3 9omV9yj7tzyhdKmUvVNttt/ZGnzTyTw2ThsAJSL49lqfoigG3Q40v9LKwMvqhJ19SgSZDslcq PmVWuEDaeEwTidQGCS3P/uH9ZM+nnPmojiigTMf0+eJ3CWrY6mtbnjpbSEmpSzw/3Pb/avQgt VDEwDSwhG59hWbP2n3pk96jRURrtdo7ow/J7WT9HoV/SQ24jECBFW6vtMereLlgp6/1x3p6Fp LfYlqaSB3dKC7hzkNaaVohFUF6li+OHZnyTxNp4YgVzARQsl6Zn6LNex4xZ0gElFnVAi/Kfoy +VF0rRDN+dp4K+DswEPleRBeCpXLFCjIabsZosoah1yDaM0tqNW24zKJ02SIzFvOJcASqpMHW QJfXe2gaRjsOJIiU5W5lL4ODmsDn26RIH0lttGdTY6AR4fxsAr+L2wb4cOK5tF5Fcj6/A9ch4 83pD5enTXEULw1ASCOXugOuPx92JBFYj5an4tlCWtRuhb2bZTUjlnNzuu61eOB5FAntmRd5QW NDxgf9fcGB0mS92dK2RgyrI8EP/jyCMq8X2fNs4tt9cIVEHz7yDV0Z+ox5wnT6dgJF+0qvk6o c37g2jyu6rLBVEmjYyK/B+MPDGOJ3kEESM+45qbOhwjbjf7UoCM8yUDQt+Y/qCSYsV5rOyhIq HGWwfoM9kKax6yzOzZcj+lbF/g7hDUSanWlaHH450DH+GYTaIB6KDiSXuT1Ckmt7/W1RHScn9 /qG578zJGhcIUCGIaAltgvZbmSMJ93Vg4Sw3zw== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12242 Lines: 292 v4l2_subdev_call is a macro returning whatever the callback return type is, usually 'int'. With gcc-7 and ccache, this can lead to many wanings like: media/platform/pxa_camera.c: In function 'pxa_mbus_build_fmts_xlate': media/platform/pxa_camera.c:766:27: error: ?: using integer constants in boolean context [-Werror=int-in-bool-context] while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) { media/atomisp/pci/atomisp2/atomisp_cmd.c: In function 'atomisp_s_ae_window': media/atomisp/pci/atomisp2/atomisp_cmd.c:6414:52: error: ?: using integer constants in boolean context [-Werror=int-in-bool-context] if (v4l2_subdev_call(isp->inputs[asd->input_curr].camera, The best workaround I could come up with is to change all the callers that use the return code from v4l2_subdev_call() in an 'if' or 'while' condition. In case of simple 'if' checks, adding a temporary variable is usually ok, and sometimes this can be used to propagate or print an error code, so I do that. For the 'while' loops, I ended up adding an otherwise useless comparison with zero, which unfortunately makes the code a little uglied. Signed-off-by: Arnd Bergmann --- drivers/media/pci/cx18/cx18-ioctl.c | 6 ++++-- drivers/media/pci/saa7146/mxb.c | 5 +++-- drivers/media/platform/atmel/atmel-isc.c | 4 ++-- drivers/media/platform/atmel/atmel-isi.c | 4 ++-- drivers/media/platform/blackfin/bfin_capture.c | 4 ++-- drivers/media/platform/omap3isp/ispccdc.c | 5 +++-- drivers/media/platform/pxa_camera.c | 3 ++- drivers/media/platform/rcar-vin/rcar-core.c | 2 +- drivers/media/platform/rcar-vin/rcar-dma.c | 4 +++- drivers/media/platform/soc_camera/soc_camera.c | 4 ++-- drivers/media/platform/stm32/stm32-dcmi.c | 4 ++-- drivers/media/platform/ti-vpe/cal.c | 6 ++++-- drivers/staging/media/atomisp/pci/atomisp2/atomisp_cmd.c | 13 +++++++------ 13 files changed, 37 insertions(+), 27 deletions(-) diff --git a/drivers/media/pci/cx18/cx18-ioctl.c b/drivers/media/pci/cx18/cx18-ioctl.c index 80b902b12a78..1803f28fc501 100644 --- a/drivers/media/pci/cx18/cx18-ioctl.c +++ b/drivers/media/pci/cx18/cx18-ioctl.c @@ -188,6 +188,7 @@ static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh, { struct cx18 *cx = fh2id(fh)->cx; struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced; + int ret; /* sane, V4L2 spec compliant, defaults */ vbifmt->reserved[0] = 0; @@ -201,8 +202,9 @@ static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh, * digitizer/slicer. Note, cx18_av_vbi() wipes the passed in * fmt->fmt.sliced under valid calling conditions */ - if (v4l2_subdev_call(cx->sd_av, vbi, g_sliced_fmt, &fmt->fmt.sliced)) - return -EINVAL; + ret = v4l2_subdev_call(cx->sd_av, vbi, g_sliced_fmt, &fmt->fmt.sliced); + if (ret) + return ret; vbifmt->service_set = cx18_get_service_set(vbifmt); return 0; diff --git a/drivers/media/pci/saa7146/mxb.c b/drivers/media/pci/saa7146/mxb.c index 504d78807639..d2d843c38579 100644 --- a/drivers/media/pci/saa7146/mxb.c +++ b/drivers/media/pci/saa7146/mxb.c @@ -525,8 +525,9 @@ static int vidioc_s_input(struct file *file, void *fh, unsigned int input) return err; /* switch video in saa7111a */ - if (saa7111a_call(mxb, video, s_routing, i, SAA7111_FMT_CCIR, 0)) - pr_err("VIDIOC_S_INPUT: could not address saa7111a\n"); + err = saa7111a_call(mxb, video, s_routing, i, SAA7111_FMT_CCIR, 0); + if (err) + pr_err("VIDIOC_S_INPUT: could not address saa7111a: %d\n", err); mxb->cur_audinput = video_audio_connect[input]; /* switch the audio-source only if necessary */ diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c index d6534252cdcd..704b34a0cc00 100644 --- a/drivers/media/platform/atmel/atmel-isc.c +++ b/drivers/media/platform/atmel/atmel-isc.c @@ -1475,8 +1475,8 @@ static int isc_formats_init(struct isc_device *isc) fmt++; } - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, - NULL, &mbus_code)) { + while (v4l2_subdev_call(subdev, pad, enum_mbus_code, + NULL, &mbus_code) == 0) { mbus_code.index++; fmt = find_format_by_code(mbus_code.code, &i); if (!fmt) diff --git a/drivers/media/platform/atmel/atmel-isi.c b/drivers/media/platform/atmel/atmel-isi.c index 891fa2505efa..30b7e6f298ed 100644 --- a/drivers/media/platform/atmel/atmel-isi.c +++ b/drivers/media/platform/atmel/atmel-isi.c @@ -1013,8 +1013,8 @@ static int isi_formats_init(struct atmel_isi *isi) .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, - NULL, &mbus_code)) { + while (v4l2_subdev_call(subdev, pad, enum_mbus_code, + NULL, &mbus_code) == 0) { for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { if (isi_formats[i].mbus_code != mbus_code.code) continue; diff --git a/drivers/media/platform/blackfin/bfin_capture.c b/drivers/media/platform/blackfin/bfin_capture.c index 1c5166df46f5..864c98f21a0e 100644 --- a/drivers/media/platform/blackfin/bfin_capture.c +++ b/drivers/media/platform/blackfin/bfin_capture.c @@ -157,8 +157,8 @@ static int bcap_init_sensor_formats(struct bcap_device *bcap_dev) unsigned int num_formats = 0; int i, j; - while (!v4l2_subdev_call(bcap_dev->sd, pad, - enum_mbus_code, NULL, &code)) { + while (v4l2_subdev_call(bcap_dev->sd, pad, + enum_mbus_code, NULL, &code) == 0) { num_formats++; code.index++; } diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c index 7207558d722c..a94157461f58 100644 --- a/drivers/media/platform/omap3isp/ispccdc.c +++ b/drivers/media/platform/omap3isp/ispccdc.c @@ -1132,6 +1132,7 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) unsigned int sph; u32 syn_mode; u32 ccdc_pattern; + int ret; ccdc->bt656 = false; ccdc->fields = 0; @@ -1140,7 +1141,6 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) sensor = media_entity_to_v4l2_subdev(pad->entity); if (ccdc->input == CCDC_INPUT_PARALLEL) { struct v4l2_mbus_config cfg; - int ret; ret = v4l2_subdev_call(sensor, video, g_mbus_config, &cfg); if (!ret) @@ -1158,7 +1158,8 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) */ fmt_src.pad = pad->index; fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE; - if (!v4l2_subdev_call(sensor, pad, get_fmt, NULL, &fmt_src)) { + ret = v4l2_subdev_call(sensor, pad, get_fmt, NULL, &fmt_src); + if (!ret) { fmt_info = omap3isp_video_format_info(fmt_src.format.code); depth_in = fmt_info->width; } diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c index 399095170b6e..5236c7b171ea 100644 --- a/drivers/media/platform/pxa_camera.c +++ b/drivers/media/platform/pxa_camera.c @@ -763,7 +763,8 @@ static struct soc_camera_format_xlate *pxa_mbus_build_fmts_xlate( }; struct soc_camera_format_xlate *user_formats; - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code)) { + while (v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &code) == + 0) { raw_fmts++; code.index++; } diff --git a/drivers/media/platform/rcar-vin/rcar-core.c b/drivers/media/platform/rcar-vin/rcar-core.c index 77dff047c41c..a41f4a3d9b69 100644 --- a/drivers/media/platform/rcar-vin/rcar-core.c +++ b/drivers/media/platform/rcar-vin/rcar-core.c @@ -54,7 +54,7 @@ static bool rvin_mbus_supported(struct rvin_graph_entity *entity) code.index = 0; code.pad = entity->source_pad; - while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { + while (v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code) == 0) { code.index++; switch (code.code) { case MEDIA_BUS_FMT_YUYV8_1X16: diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c index b136844499f6..ee16e9886041 100644 --- a/drivers/media/platform/rcar-vin/rcar-dma.c +++ b/drivers/media/platform/rcar-vin/rcar-dma.c @@ -143,6 +143,7 @@ static int rvin_setup(struct rvin_dev *vin) u32 vnmc, dmr, dmr2, interrupts; v4l2_std_id std; bool progressive = false, output_is_yuv = false, input_is_yuv = false; + int ret; switch (vin->format.field) { case V4L2_FIELD_TOP: @@ -155,7 +156,8 @@ static int rvin_setup(struct rvin_dev *vin) /* Default to TB */ vnmc = VNMC_IM_FULL; /* Use BT if video standard can be read and is 60 Hz format */ - if (!v4l2_subdev_call(vin_to_source(vin), video, g_std, &std)) { + ret = v4l2_subdev_call(vin_to_source(vin), video, g_std, &std); + if (ret) { if (std & V4L2_STD_525_60) vnmc = VNMC_IM_FULL | VNMC_FOC; } diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c index 45a0429d75bb..3ef648fc2db6 100644 --- a/drivers/media/platform/soc_camera/soc_camera.c +++ b/drivers/media/platform/soc_camera/soc_camera.c @@ -454,7 +454,7 @@ static int soc_camera_init_user_formats(struct soc_camera_device *icd) .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; - while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { + while (v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code) == 0) { raw_fmts++; code.index++; } @@ -1202,7 +1202,7 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd) goto evidstart; /* Try to improve our guess of a reasonable window format */ - if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) { + if (v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt) == 0) { icd->user_width = mf->width; icd->user_height = mf->height; icd->colorspace = mf->colorspace; diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c index 83d32a5d0f40..96084dfd5d11 100644 --- a/drivers/media/platform/stm32/stm32-dcmi.c +++ b/drivers/media/platform/stm32/stm32-dcmi.c @@ -1034,8 +1034,8 @@ static int dcmi_formats_init(struct stm32_dcmi *dcmi) .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, - NULL, &mbus_code)) { + while (v4l2_subdev_call(subdev, pad, enum_mbus_code, + NULL, &mbus_code) == 0) { for (i = 0; i < ARRAY_SIZE(dcmi_formats); i++) { if (dcmi_formats[i].mbus_code != mbus_code.code) continue; diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c index 177faa36bc16..df0216a6367c 100644 --- a/drivers/media/platform/ti-vpe/cal.c +++ b/drivers/media/platform/ti-vpe/cal.c @@ -1348,9 +1348,11 @@ static void cal_stop_streaming(struct vb2_queue *vq) struct cal_dmaqueue *dma_q = &ctx->vidq; struct cal_buffer *buf, *tmp; unsigned long flags; + int ret; - if (v4l2_subdev_call(ctx->sensor, video, s_stream, 0)) - ctx_err(ctx, "stream off failed in subdev\n"); + ret = v4l2_subdev_call(ctx->sensor, video, s_stream, 0); + if (ret) + ctx_err(ctx, "stream off failed in subdev: %d\n", ret); csi2_ppi_disable(ctx); disable_irqs(ctx); diff --git a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp2/atomisp_cmd.c index 97093baf28ac..fe56a037f065 100644 --- a/drivers/staging/media/atomisp/pci/atomisp2/atomisp_cmd.c +++ b/drivers/staging/media/atomisp/pci/atomisp2/atomisp_cmd.c @@ -6405,19 +6405,20 @@ int atomisp_s_ae_window(struct atomisp_sub_device *asd, struct atomisp_device *isp = asd->isp; /* Coverity CID 298071 - initialzize struct */ struct v4l2_subdev_selection sel = { 0 }; + int ret; sel.r.left = arg->x_left; sel.r.top = arg->y_top; sel.r.width = arg->x_right - arg->x_left + 1; sel.r.height = arg->y_bottom - arg->y_top + 1; - if (v4l2_subdev_call(isp->inputs[asd->input_curr].camera, - pad, set_selection, NULL, &sel)) { - dev_err(isp->dev, "failed to call sensor set_selection.\n"); - return -EINVAL; - } + ret = v4l2_subdev_call(isp->inputs[asd->input_curr].camera, + pad, set_selection, NULL, &sel); + if (ret) + dev_err(isp->dev, "failed to call sensor set_selection: %d\n", + ret); - return 0; + return ret; } int atomisp_flash_enable(struct atomisp_sub_device *asd, int num_frames) -- 2.9.0