From: Mauro Carvalho Chehab <mchehab@redhat.com>
Date: Wed, 17 Dec 2008 01:04:56 +0000 (-0300)
Subject: V4L/DVB (9912): em28xx: fix/improve em28xx locking schema
X-Git-Tag: v2.6.29-rc1~556^2~174
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=efc52a94840198eb5ba68107812b879d34959dbb;p=pandora-kernel.git

V4L/DVB (9912): em28xx: fix/improve em28xx locking schema

Changes/fixes on em28xx dev->lock:

- em28xx_init_dev() were unlocking without a previous lock;

- some read ioctls need to lock after the removal of KBL, since a write
  may be happening at the same time an ioctl is reading;

- keep the device locked during all device initialization;

- lock/unlock while reading/writing registers.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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