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 900E426B0BD; Thu, 13 Feb 2025 15:29:46 +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=1739460586; cv=none; b=cOPj4HHO6yStbmP3QKV17MJrmEAl3rg7ifGl9NqtuwWMGl+gyaM7TJWbqSEf5iR9Ug5m47H4TPa73ZbIMAoAcSswpoq9MIerbCJwLFQripRDv6uD7gxVlkAoc1ja3pZbRPm8SZI0uAdUMCm3xwDuRjU5Saa9pdbEj4kSv0N8S4o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739460586; c=relaxed/simple; bh=1xlTeI/49D8GSm9sMkqgOQz9HqaXUJQAKbv1XGZ4JbE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lM6H0B1WROLe7uXszMBYNVDZjbh8FGb26j+WGa9qY2kGRhn8gtDm0XhFFeznPyT6r5fe2sRrbC0RWfofNQdA8yE+U7fqTRBCrY0pgvOYdlWp99e56vGqiUtEi3rDCkZvvw/b/gGzjkjUcQO7/vcwnMHQJs06rVKgRoiUcQzMyAc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FBo5dmA7; 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="FBo5dmA7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8362BC4CED1; Thu, 13 Feb 2025 15:29:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739460586; bh=1xlTeI/49D8GSm9sMkqgOQz9HqaXUJQAKbv1XGZ4JbE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FBo5dmA7xujaMnWmP676gdtcDB+KOBvWrYCGsE87UPOKNmHEZJ+CczIV8+Wgz/Q5m HSmUgUvENPHvaOp/tA22vSsiahU+meE1Cxf2nqMnhVNHidtlcwJ6AZKlJNP18/GK5L Fu/PMHCBJ1yvWJEkb7Qq0iHOJVPnrtssWKqyMh5Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tomasz Sikora , Thadeu Lima de Souza Cascardo , Laurent Pinchart , Hans de Goede , Ricardo Ribalda , Mauro Carvalho Chehab Subject: [PATCH 6.6 154/273] Revert "media: uvcvideo: Require entities to have a non-zero unique ID" Date: Thu, 13 Feb 2025 15:28:46 +0100 Message-ID: <20250213142413.423912654@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250213142407.354217048@linuxfoundation.org> References: <20250213142407.354217048@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Thadeu Lima de Souza Cascardo commit 8004d635f27bbccaa5c083c50d4d5302a6ffa00e upstream. This reverts commit 3dd075fe8ebbc6fcbf998f81a75b8c4b159a6195. Tomasz has reported that his device, Generalplus Technology Inc. 808 Camera, with ID 1b3f:2002, stopped being detected: $ ls -l /dev/video* zsh: no matches found: /dev/video* [ 7.230599] usb 3-2: Found multiple Units with ID 5 This particular device is non-compliant, having both the Output Terminal and Processing Unit with ID 5. uvc_scan_fallback, though, is able to build a chain. However, when media elements are added and uvc_mc_create_links call uvc_entity_by_id, it will get the incorrect entity, media_create_pad_link will WARN, and it will fail to register the entities. In order to reinstate support for such devices in a timely fashion, reverting the fix for these warnings is appropriate. A proper fix that considers the existence of such non-compliant devices will be submitted in a later development cycle. Reported-by: Tomasz Sikora Fixes: 3dd075fe8ebb ("media: uvcvideo: Require entities to have a non-zero unique ID") Cc: stable@vger.kernel.org Signed-off-by: Thadeu Lima de Souza Cascardo Reviewed-by: Laurent Pinchart Reviewed-by: Hans de Goede Reviewed-by: Ricardo Ribalda Link: https://lore.kernel.org/r/20250114200045.1401644-1-cascardo@igalia.com Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/usb/uvc/uvc_driver.c | 70 ++++++++++++++----------------------- 1 file changed, 27 insertions(+), 43 deletions(-) --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -775,27 +775,14 @@ static const u8 uvc_media_transport_inpu UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; -static struct uvc_entity *uvc_alloc_new_entity(struct uvc_device *dev, u16 type, - u16 id, unsigned int num_pads, - unsigned int extra_size) +static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id, + unsigned int num_pads, unsigned int extra_size) { struct uvc_entity *entity; unsigned int num_inputs; unsigned int size; unsigned int i; - /* Per UVC 1.1+ spec 3.7.2, the ID should be non-zero. */ - if (id == 0) { - dev_err(&dev->udev->dev, "Found Unit with invalid ID 0.\n"); - return ERR_PTR(-EINVAL); - } - - /* Per UVC 1.1+ spec 3.7.2, the ID is unique. */ - if (uvc_entity_by_id(dev, id)) { - dev_err(&dev->udev->dev, "Found multiple Units with ID %u\n", id); - return ERR_PTR(-EINVAL); - } - extra_size = roundup(extra_size, sizeof(*entity->pads)); if (num_pads) num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1; @@ -805,7 +792,7 @@ static struct uvc_entity *uvc_alloc_new_ + num_inputs; entity = kzalloc(size, GFP_KERNEL); if (entity == NULL) - return ERR_PTR(-ENOMEM); + return NULL; entity->id = id; entity->type = type; @@ -917,10 +904,10 @@ static int uvc_parse_vendor_control(stru break; } - unit = uvc_alloc_new_entity(dev, UVC_VC_EXTENSION_UNIT, - buffer[3], p + 1, 2 * n); - if (IS_ERR(unit)) - return PTR_ERR(unit); + unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], + p + 1, 2*n); + if (unit == NULL) + return -ENOMEM; memcpy(unit->guid, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; @@ -1029,10 +1016,10 @@ static int uvc_parse_standard_control(st return -EINVAL; } - term = uvc_alloc_new_entity(dev, type | UVC_TERM_INPUT, - buffer[3], 1, n + p); - if (IS_ERR(term)) - return PTR_ERR(term); + term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], + 1, n + p); + if (term == NULL) + return -ENOMEM; if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { term->camera.bControlSize = n; @@ -1088,10 +1075,10 @@ static int uvc_parse_standard_control(st return 0; } - term = uvc_alloc_new_entity(dev, type | UVC_TERM_OUTPUT, - buffer[3], 1, 0); - if (IS_ERR(term)) - return PTR_ERR(term); + term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], + 1, 0); + if (term == NULL) + return -ENOMEM; memcpy(term->baSourceID, &buffer[7], 1); @@ -1110,10 +1097,9 @@ static int uvc_parse_standard_control(st return -EINVAL; } - unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], - p + 1, 0); - if (IS_ERR(unit)) - return PTR_ERR(unit); + unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); + if (unit == NULL) + return -ENOMEM; memcpy(unit->baSourceID, &buffer[5], p); @@ -1133,9 +1119,9 @@ static int uvc_parse_standard_control(st return -EINVAL; } - unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], 2, n); - if (IS_ERR(unit)) - return PTR_ERR(unit); + unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); + if (unit == NULL) + return -ENOMEM; memcpy(unit->baSourceID, &buffer[4], 1); unit->processing.wMaxMultiplier = @@ -1162,10 +1148,9 @@ static int uvc_parse_standard_control(st return -EINVAL; } - unit = uvc_alloc_new_entity(dev, buffer[2], buffer[3], - p + 1, n); - if (IS_ERR(unit)) - return PTR_ERR(unit); + unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); + if (unit == NULL) + return -ENOMEM; memcpy(unit->guid, &buffer[4], 16); unit->extension.bNumControls = buffer[20]; @@ -1305,10 +1290,9 @@ static int uvc_gpio_parse(struct uvc_dev return dev_err_probe(&dev->udev->dev, irq, "No IRQ for privacy GPIO\n"); - unit = uvc_alloc_new_entity(dev, UVC_EXT_GPIO_UNIT, - UVC_EXT_GPIO_UNIT_ID, 0, 1); - if (IS_ERR(unit)) - return PTR_ERR(unit); + unit = uvc_alloc_entity(UVC_EXT_GPIO_UNIT, UVC_EXT_GPIO_UNIT_ID, 0, 1); + if (!unit) + return -ENOMEM; unit->gpio.gpio_privacy = gpio_privacy; unit->gpio.irq = irq;