From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5781E2F199C; Thu, 3 Jul 2025 15:16:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751555761; cv=none; b=h7SJzMY0Dvg/9NX2aJmX15bxi3yzBlc8xlyK1RFY2+OUQKAkk73eP6cH2agQ22O9pLBlb1vkA7Pmet2M+730+4d/AAR7PAwflDSpd+OLDvhqmrGaQYdnDAwbGSz95cS5Pp3ZQPT+9o3w++KyCbI2f8RQnyT+HGjkgyDSHLM3CVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751555761; c=relaxed/simple; bh=ugTJAuzuUPUcRpiKoEjriPT2UuUbu0EbkCacvrGqAVs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T1Bb5qJC55uuvmxMaJKi/xLc86iCenEOJyfAPttiL3NtQGGw7HC9OSZqChhcldItnHEH2HPQoT2oc5B16Uor3nakxKGRFZyhM+XM/AKeJtGBIDccQUrX1A65M1+V/mbcIi6Z+Nb5QIF5T7Wnvmmg8vseIF8SWhBa29hXonfWKbw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=VL1M5kEV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="VL1M5kEV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8B13C4CEE3; Thu, 3 Jul 2025 15:16:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1751555761; bh=ugTJAuzuUPUcRpiKoEjriPT2UuUbu0EbkCacvrGqAVs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VL1M5kEVbYIsVdV63W2FAzwMELSFQVGJwrWRweUJOR9a0qimGBUVT/Z6asK0Q8DeS +5iBcI59B3LZ/HuHQnHe97CwLu0yG3tbfPQ4oPWn1eBejqmK1moWOxy3fZ8FCig6B7 LCU4pkvtkvDNljVhUYW93mDauYM1LYKR4WkmRt+s= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Zimmermann , dri-devel@lists.freedesktop.org, Patrik Jakobsson Subject: [PATCH 6.6 114/139] drm/udl: Unregister device before cleaning up on disconnect Date: Thu, 3 Jul 2025 16:42:57 +0200 Message-ID: <20250703143945.646153177@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250703143941.182414597@linuxfoundation.org> References: <20250703143941.182414597@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Zimmermann commit ff9cb6d2035c586ea7c8f1754d4409eec7a2d26d upstream. Disconnecting a DisplayLink device results in the following kernel error messages [ 93.041748] [drm:udl_urb_completion [udl]] *ERROR* udl_urb_completion - nonzero write bulk status received: -115 [ 93.055299] [drm:udl_submit_urb [udl]] *ERROR* usb_submit_urb error fffffffe [ 93.065363] [drm:udl_urb_completion [udl]] *ERROR* udl_urb_completion - nonzero write bulk status received: -115 [ 93.078207] [drm:udl_submit_urb [udl]] *ERROR* usb_submit_urb error fffffffe coming from KMS poll helpers. Shutting down poll helpers runs them one final time when the USB device is already gone. Run drm_dev_unplug() first in udl's USB disconnect handler. Udl's polling code already handles disconnects gracefully if the device has been marked as unplugged. Signed-off-by: Thomas Zimmermann Fixes: b1a981bd5576 ("drm/udl: drop drm_driver.release hook") Cc: dri-devel@lists.freedesktop.org Cc: # v5.8+ Reviewed-by: Patrik Jakobsson Link: https://patchwork.freedesktop.org/patch/msgid/20250303145604.62962-2-tzimmermann@suse.de Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/udl/udl_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/udl/udl_drv.c +++ b/drivers/gpu/drm/udl/udl_drv.c @@ -126,9 +126,9 @@ static void udl_usb_disconnect(struct us { struct drm_device *dev = usb_get_intfdata(interface); + drm_dev_unplug(dev); drm_kms_helper_poll_fini(dev); udl_drop_usb(dev); - drm_dev_unplug(dev); } /*