From: Ricardo Ribalda <ribalda@chromium.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Ricardo Ribalda <ribalda@chromium.org>
Subject: [PATCH v5 05/12] media: uvcvideo: Allow entities with no pads
Date: Mon, 21 Dec 2020 17:48:12 +0100 [thread overview]
Message-ID: <20201221164819.792019-6-ribalda@chromium.org> (raw)
In-Reply-To: <20201221164819.792019-1-ribalda@chromium.org>
Avoid an underflow while calculating the number of inputs for entities
with zero pads.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
---
drivers/media/usb/uvc/uvc_driver.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 82cdd1bb28dc..c0c5f75ade40 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1033,7 +1033,10 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
unsigned int i;
extra_size = roundup(extra_size, sizeof(*entity->pads));
- num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
+ if (num_pads)
+ num_inputs = type & UVC_TERM_OUTPUT ? num_pads : num_pads - 1;
+ else
+ num_inputs = 0;
size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
+ num_inputs;
entity = kzalloc(size, GFP_KERNEL);
@@ -1065,7 +1068,7 @@ static struct uvc_entity *uvc_alloc_entity(u16 type, u16 id,
for (i = 0; i < num_inputs; ++i)
entity->pads[i].flags = MEDIA_PAD_FL_SINK;
- if (!UVC_ENTITY_IS_OTERM(entity))
+ if (!UVC_ENTITY_IS_OTERM(entity) && num_pads)
entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
entity->bNrInPins = num_inputs;
--
2.29.2.684.gfbc64c5ab5-goog
next prev parent reply other threads:[~2020-12-21 18:39 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-21 16:48 [PATCH v5 00/12]Show privacy_gpio as a v4l2_ctrl Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 01/12] media: uvcvideo: Fix race condition handling events Ricardo Ribalda
2020-12-22 8:04 ` Laurent Pinchart
2020-12-21 16:48 ` [PATCH v5 02/12] media: uvcvideo: Allow more that one asyc_ctrl Ricardo Ribalda
2020-12-22 8:07 ` Laurent Pinchart
2020-12-21 16:48 ` [PATCH v5 03/12] media: uvcvideo: Move guid to entity Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 04/12] media: uvcvideo: Allow extra entities Ricardo Ribalda
2020-12-21 18:17 ` Ricardo Ribalda
2020-12-21 16:48 ` Ricardo Ribalda [this message]
2020-12-21 16:48 ` [PATCH v5 06/12] media: uvcvideo: Allow entity-defined get_info and get_cur Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 07/12] media: uvcvideo: Implement UVC_EXT_GPIO_UNIT Ricardo Ribalda
2020-12-22 8:33 ` Laurent Pinchart
2020-12-22 8:37 ` Laurent Pinchart
2020-12-22 18:36 ` Ricardo Ribalda
2020-12-23 7:54 ` Laurent Pinchart
2020-12-21 16:48 ` [PATCH v5 08/12] media: uvcvideo: Add Privacy control based on EXT_GPIO Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 09/12] media: uvcvideo: Implement UVC_QUIRK_PRIVACY_DURING_STREAM Ricardo Ribalda
2020-12-22 10:29 ` Laurent Pinchart
2020-12-22 20:04 ` Ricardo Ribalda
2020-12-23 8:04 ` Laurent Pinchart
2020-12-23 8:31 ` Ricardo Ribalda
2020-12-23 12:55 ` Ricardo Ribalda
2021-04-20 4:54 ` Tomasz Figa
2022-02-04 5:59 ` Tomasz Figa
2020-12-21 16:48 ` [PATCH v5 10/12] media: uvcvideo: Use dev_ printk aliases Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 11/12] media: uvcvideo: New macro uvc_trace_cont Ricardo Ribalda
2020-12-21 16:48 ` [PATCH v5 12/12] media: uvcvideo: use dev_dbg() for uvc_trace() Ricardo Ribalda
2020-12-22 8:51 ` Laurent Pinchart
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