From: Daniel Vetter Date: Tue, 11 Dec 2012 20:52:30 +0000 (+0100) Subject: drm/nouveau: try to protect nbo->pin_refcount X-Git-Tag: v3.9-rc1~83^2~38^2~29 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0ae6d7bc0e70dafc1739d50b2b8d9d7c61968395;p=pandora-kernel.git drm/nouveau: try to protect nbo->pin_refcount ... by moving the bo_pin/bo_unpin manipulation of the pin_refcount under the protection of the ttm reservation lock. pin/unpin seems to get called from all over the place, so atm this is completely racy. After this patch there are only a few places in cleanup functions left which access ->pin_refcount without locking. But I'm hoping that those are safe and some other code invariant guarantees that this won't blow up. In any case, I only need to fix up pin/unpin to make ->pageflip work safely, so let's keep it at that. Add a comment to the header to explain the new locking rule. Signed-off-by: Daniel Vetter --- Reading git-diff-tree failed