[Bug 91926] [SKL bisected] texsubimage pbo intermittent failures

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91926

--- Comment #78 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #76)
> It is not certain if it is the tex-update-blit itself that is failing.
> Running the same test without -fbo option works. And that option doesn't
> affect the blit in question in anyway.
> 
> Also adding a glClear() (against the main fbo) just after the tex-blit makes
> the
> error go a way just as in IVB case.

Dumping the contents of the blit just after it unfortunately makes the error go
away as well (intel_miptree_map()/unmap() pair seems to help).

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