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{
    "id": 3070,
    "url": "https://patchwork.libcamera.org/api/patches/3070/?format=api",
    "web_url": "https://patchwork.libcamera.org/patch/3070/",
    "project": {
        "id": 1,
        "url": "https://patchwork.libcamera.org/api/projects/1/?format=api",
        "name": "libcamera",
        "link_name": "libcamera",
        "list_id": "libcamera_core",
        "list_email": "libcamera-devel@lists.libcamera.org",
        "web_url": "",
        "scm_url": "",
        "webscm_url": ""
    },
    "msgid": "<20200309162414.720306-6-jacopo@jmondi.org>",
    "date": "2020-03-09T16:24:08",
    "name": "[libcamera-devel,05/11] libcamera: v4l2_controls: Fix usage of strerror()",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": false,
    "hash": "79ab94f5cfa5ad6589c57e7c412dc973696c8ddb",
    "submitter": {
        "id": 3,
        "url": "https://patchwork.libcamera.org/api/people/3/?format=api",
        "name": "Jacopo Mondi",
        "email": "jacopo@jmondi.org"
    },
    "delegate": null,
    "mbox": "https://patchwork.libcamera.org/patch/3070/mbox/",
    "series": [
        {
            "id": 716,
            "url": "https://patchwork.libcamera.org/api/series/716/?format=api",
            "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=716",
            "date": "2020-03-09T16:24:03",
            "name": "Adda support for V4L2 array control and strings",
            "version": 1,
            "mbox": "https://patchwork.libcamera.org/series/716/mbox/"
        }
    ],
    "comments": "https://patchwork.libcamera.org/api/patches/3070/comments/",
    "check": "pending",
    "checks": "https://patchwork.libcamera.org/api/patches/3070/checks/",
    "tags": {},
    "headers": {
        "Return-Path": "<jacopo@jmondi.org>",
        "Received": [
            "from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net\n\t[217.70.183.195])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 14BEB6292C\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon,  9 Mar 2020 17:21:30 +0100 (CET)",
            "from uno.lan (93-34-114-233.ip49.fastwebnet.it [93.34.114.233])\n\t(Authenticated sender: jacopo@jmondi.org)\n\tby relay3-d.mail.gandi.net (Postfix) with ESMTPSA id BB22460019\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tMon,  9 Mar 2020 16:21:29 +0000 (UTC)"
        ],
        "X-Originating-IP": "93.34.114.233",
        "From": "Jacopo Mondi <jacopo@jmondi.org>",
        "To": "libcamera-devel@lists.libcamera.org",
        "Date": "Mon,  9 Mar 2020 17:24:08 +0100",
        "Message-Id": "<20200309162414.720306-6-jacopo@jmondi.org>",
        "X-Mailer": "git-send-email 2.25.0",
        "In-Reply-To": "<20200309162414.720306-1-jacopo@jmondi.org>",
        "References": "<20200309162414.720306-1-jacopo@jmondi.org>",
        "MIME-Version": "1.0",
        "Content-Transfer-Encoding": "8bit",
        "Subject": "[libcamera-devel] [PATCH 05/11] libcamera: v4l2_controls: Fix usage\n\tof strerror()",
        "X-BeenThere": "libcamera-devel@lists.libcamera.org",
        "X-Mailman-Version": "2.1.29",
        "Precedence": "list",
        "List-Id": "<libcamera-devel.lists.libcamera.org>",
        "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>",
        "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>",
        "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>",
        "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>",
        "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>",
        "X-List-Received-Date": "Mon, 09 Mar 2020 16:21:32 -0000"
    },
    "content": "On failure, the return code from V4L2Device::ioctl() is the negative error\ncode set by the failed ::ioctl() system call. When the return code of\nV4L2Device::ioctl() is provided to strerror() it has to be negated again\nto obtain the positive error code. Fix a few wrong usages of the return\ncode which provided to the strerror() function a negative error code.\n\nSigned-off-by: Jacopo Mondi <jacopo@jmondi.org>\n---\n src/libcamera/v4l2_device.cpp | 8 ++++----\n 1 file changed, 4 insertions(+), 4 deletions(-)",
    "diff": "diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp\nindex 98639bd0f07f..179476e9afad 100644\n--- a/src/libcamera/v4l2_device.cpp\n+++ b/src/libcamera/v4l2_device.cpp\n@@ -201,13 +201,13 @@ int V4L2Device::getControls(ControlList *ctrls)\n \t\t/* Generic validation error. */\n \t\tif (errorIdx == 0 || errorIdx >= count) {\n \t\t\tLOG(V4L2, Error) << \"Unable to read controls: \"\n-\t\t\t\t\t << strerror(ret);\n+\t\t\t\t\t << strerror(-ret);\n \t\t\treturn -EINVAL;\n \t\t}\n \n \t\t/* A specific control failed. */\n \t\tLOG(V4L2, Error) << \"Unable to read control \" << errorIdx\n-\t\t\t\t << \": \" << strerror(ret);\n+\t\t\t\t << \": \" << strerror(-ret);\n \t\tcount = errorIdx - 1;\n \t\tret = errorIdx;\n \t}\n@@ -291,13 +291,13 @@ int V4L2Device::setControls(ControlList *ctrls)\n \t\t/* Generic validation error. */\n \t\tif (errorIdx == 0 || errorIdx >= count) {\n \t\t\tLOG(V4L2, Error) << \"Unable to set controls: \"\n-\t\t\t\t\t << strerror(ret);\n+\t\t\t\t\t << strerror(-ret);\n \t\t\treturn -EINVAL;\n \t\t}\n \n \t\t/* A specific control failed. */\n \t\tLOG(V4L2, Error) << \"Unable to set control \" << errorIdx\n-\t\t\t\t << \": \" << strerror(ret);\n+\t\t\t\t << \": \" << strerror(-ret);\n \t\tcount = errorIdx - 1;\n \t\tret = errorIdx;\n \t}\n",
    "prefixes": [
        "libcamera-devel",
        "05/11"
    ]
}