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videobuf2 has long been subject to AB-BA style deadlocks due to the queue lock and mmap_sem being taken in different orders for the mmap and get_unmapped_area operations. The problem has been fixed by making those two operations callable without taking the queue lock, using an mmap_lock internal to videobuf2. The uvcvideo driver still calls the mmap and get_unmapped_area operations with the queue lock held, resulting in a potential deadlock. As the operations can now be called without locking the queue, fix it. Reported-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> |
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.. | ||
common | ||
dvb-core | ||
dvb-frontends | ||
firewire | ||
i2c | ||
mmc | ||
pci | ||
platform | ||
radio | ||
rc | ||
tuners | ||
usb | ||
v4l2-core | ||
Kconfig | ||
Makefile | ||
media-device.c | ||
media-devnode.c | ||
media-entity.c |