[PATCH V2] gpu: host1x: handle the correct # of syncpt regs

[Thierry Reding]

On Mon, Apr 14, 2014 at 02:53:51PM -0600, Stephen Warren wrote:
> On 04/04/2014 04:31 PM, Stephen Warren wrote:
> > From: Stephen Warren <swarren at nvidia.com>
> > 
> > BIT_WORD() truncates rather than rounds, so the loops in
> > syncpt_thresh_isr() and _host1x_intr_disable_all_syncpt_intrs() use <=
> > rather than < in an attempt to process the correct number of registers
> > when rounding of the conversion of count of bits to count of words is
> > necessary. However, when rounding isn't necessary because the value is
> > already a multiple of the divisor (as is the case for all values of
> > nb_pts the code actually sees), this causes one too many registers to
> > be processed.
> > 
> > Solve this by using and explicit DIV_ROUND_UP() call, rather than
> > BIT_WORD(), and comparing with < rather than <=.
> 
> I don't see this in linux-next yet.

I've queued this locally but haven't pushed anything out yet.

Thierry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20140414/58ec45bf/attachment.sig>