Messages in this thread |  | | | From | Chris Wilson <> | | Subject | Re: [PATCH] video/console: Clip the right margin clear to the visible region | | Date | Fri, 30 Mar 2012 08:56:10 +0100 |
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On Fri, 30 Mar 2012 01:16:32 +0000, Florian Tobias Schandinat <FlorianSchandinat@gmx.de> wrote: > Hi Chris, > On 03/26/2012 08:17 PM, Chris Wilson wrote: > > For some unknown reason, yres_virtual was 2x larger the the size specified > > by i915 and so when blit_clear_margins() tried to clear the full virtual > > right-hand margin it tried to write far beyond the end of the buffer. > > > > This limits the clear to only the visible portion of the right-hand > > margin, similar to how the bottom margin is treated. > > > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38138 > > as you also found the root of the problem and posted a patch to fix i915 > (or rather all KMS-based framebuffers) by validating the virtual > resolution in check var, I don't see any reason to apply this one. I'm > not sure about it, but changing the behaviour of this function might > cause some undesired changes in user experience and as there is no > problem with this code as is, I'd prefer to not change it.
Ok, thanks for the review. Preventing userspace from programming an unhandled value of yres_virtual is definitely the way forward. -Chris
-- Chris Wilson, Intel Open Source Technology Centre
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