From patchwork Fri Apr 26 08:50:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 792515 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3A91D13D89F for ; Fri, 26 Apr 2024 08:50:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.20 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714121460; cv=none; b=s3IbnH8bKNDI+9Q1Kxgn9Ca9XyF6rIqqA5mi4QNulsJ3grD+xsB8N03IfU9QNu2ZG8SNWGB+X8rXKCf0j4zquDpqyDXA14JptZQW1Q/c6jVe5llulRcOnuCcJMhW3y9O9DgzXJ9rdjdvOowSnZLBu6uJIm7T2sg8DVy2QHS6Eig= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714121460; c=relaxed/simple; bh=HWo70uAnzn4Nud/ID2UJzFa0xSOrIPMcp/Kd/BkRAak=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=KpuwwMkscCeKwATJmY/+D1KzqyUNiNHI6zMIUFErc0ptjo8dsHGVIsBOoC/j/3oDInRGlgSJiZ+D9NMYP53ykE07OEa0DawROiwm7v61WJOZ3BuKwQvBLPN+aIhBpcuDsJcpcC3R3sCLFixT5QMMEwaa+pkdUccwfK3PeYsHijs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=esSQJkQ2; arc=none smtp.client-ip=198.175.65.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="esSQJkQ2" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1714121459; x=1745657459; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HWo70uAnzn4Nud/ID2UJzFa0xSOrIPMcp/Kd/BkRAak=; b=esSQJkQ2bol35B5iWrCF4bkhx+vvt3QxTxvNmSJpGU3GUdmMh3Nf16Gg MjDQr8owFVN8un9KoFE3KSKEnvuEbnmNVm86CTuM0lMeBCOZHBk/xnwLq Ahb2lWmjPF9/VXc2xOkXQ/ExmFK72sXrqLudNBdnc3s4hWns29hUx/IWG yCasiK2KdwO9oqQGdR0jKZKDPhxsnD2jbYC4yb14vvi90JE0akiETMbdF rs4gEZeN7yBYJr+y3XKLwu62E6TCQWLBMF4WBqCP5TZfGaIotQZOMTOM1 UyH+Kdi0Xh33ZC5WAq7tpOwd/mbioL27tFSLgXHe2eDNgDwkbfBiH073K Q==; X-CSE-ConnectionGUID: 1DB2zjF9TU283iL7+dIbpA== X-CSE-MsgGUID: wwKW0jUwRtqhBmw4mH01+A== X-IronPort-AV: E=McAfee;i="6600,9927,11055"; a="9683840" X-IronPort-AV: E=Sophos;i="6.07,232,1708416000"; d="scan'208";a="9683840" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2024 01:50:59 -0700 X-CSE-ConnectionGUID: FJlZJUMPQ/KXsOAOnG/+IA== X-CSE-MsgGUID: hkZXGFwJR0yY9SIhVU05mw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,232,1708416000"; d="scan'208";a="48598541" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Apr 2024 01:50:57 -0700 Received: from svinhufvud.ger.corp.intel.com (localhost [IPv6:::1]) by kekkonen.fi.intel.com (Postfix) with ESMTP id B6F7711FA8A; Fri, 26 Apr 2024 11:50:53 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Cc: Laurent Pinchart , tomi.valkeinen@ideasonboard.com, bingbu.cao@intel.com, hongju.wang@intel.com, hverkuil@xs4all.nl, Andrey Konovalov , Jacopo Mondi , Dmitry Perchanov , "Ng, Khai Wen" , Alain Volmat Subject: [PATCH v3 11/14] media: v4l: subdev: Copy argument back to user also for S_ROUTING Date: Fri, 26 Apr 2024 11:50:35 +0300 Message-Id: <20240426085038.943733-12-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240426085038.943733-1-sakari.ailus@linux.intel.com> References: <20240426085038.943733-1-sakari.ailus@linux.intel.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 As the user needs to know what went wrong for S_ROUTING, copy array arguments back to the user. Signed-off-by: Sakari Ailus Reviewed-by: Julien Massot Reviewed-by: Laurent Pinchart --- drivers/media/v4l2-core/v4l2-ioctl.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 5e928e2a2beb..0260acef97d2 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -3461,11 +3461,14 @@ video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, * FIXME: subdev IOCTLS are partially handled here and partially in * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS * defined here as part of the 'v4l2_ioctls' array. As - * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even - * in case of failure, but it is not defined here as part of the + * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications + * even in case of failure, but it is not defined here as part of the * 'v4l2_ioctls' array, insert an ad-hoc check to address that. */ - if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING) + if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING) + always_copy = true; + + if (err < 0 && !always_copy) goto out; if (has_array_args) {