Jan Kara 0f6e2825ce [media] vb2: Push mmap_sem down to memops ... Currently vb2 core acquires mmap_sem just around call to __qbuf_userptr(). However since commit f035eb4e97 (videobuf2: fix lockdep warning) it isn't necessary to acquire it so early as we no longer have to drop queue mutex before acquiring mmap_sem. So push acquisition of mmap_sem down into .get_userptr memop so that the semaphore is acquired for a shorter time and it is clearer what it is needed for. Note that we also need mmap_sem in .put_userptr memop since that ends up calling vb2_put_vma() which calls vma->vm_ops->close() which should be called with mmap_sem held. However we didn't hold mmap_sem in some code paths anyway (e.g. when called via vb2_ioctl_reqbufs() -> __vb2_queue_free() -> vb2_dma_sg_put_userptr()) and getting mmap_sem in put_userptr() introduces a lock inversion with queue->mmap_lock in the above mentioned call path. Luckily this whole locking mess will get resolved once we convert videobuf2 core to the new mm helper which avoids the need for mmap_sem in .put_userptr memop altogether. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>		2015-08-16 13:01:10 -03:00
..
common	[media] saa7146: use swap() in sort_and_eliminate()	2015-07-06 08:25:49 -03:00
dvb-core	[media] dvb_core: Replace memset with eth_zero_addr	2015-07-22 13:32:21 -03:00
dvb-frontends	[media] tda10071: use div_s64() when dividing a s64 integer	2015-08-11 19:19:30 -03:00
firewire	[media] dvb: Get rid of typedev usage for enums	2015-06-09 17:47:35 -03:00
i2c	[media] sr030pc30: don't read a new pointer	2015-08-16 12:58:31 -03:00
mmc
pci	[media] netup_unidvb: NetUP Universal DVB-S/S2/T/T2/C PCI-E card driver	2015-08-11 15:16:40 -03:00
platform	[media] c8sectpfe: use a new Kconfig menu for DVB platform drivers	2015-08-11 19:28:23 -03:00
radio	[media] radio: Drop owner assignment from i2c_driver	2015-08-11 13:01:08 -03:00
rc	[media] rc-core: improve the lirc protocol reporting	2015-08-11 13:18:13 -03:00
tuners	[media] tuners: Drop owner assignment from i2c_driver	2015-08-11 13:01:32 -03:00
usb	[media] Technisat SkyStar USB HD,(DVB-S/S2) too much URBs for arm devices	2015-08-11 14:43:23 -03:00
v4l2-core	[media] vb2: Push mmap_sem down to memops	2015-08-16 13:01:10 -03:00
Kconfig	media updates for v4.2-rc1	2015-06-25 17:55:48 -07:00
Makefile
media-device.c
media-devnode.c
media-entity.c