On 08/27/2015 01:36 PM, Emil Velikov wrote:
Hi all,
On 27 August 2015 at 00:29, Tiago Vignatti <tiago.vignatti@xxxxxxxxx> wrote:
From: Daniel Thompson <daniel.thompson@xxxxxxxxxx>
Currently DRM_IOCTL_PRIME_HANDLE_TO_FD rejects all flags except
(DRM|O)_CLOEXEC making it difficult (maybe impossible) for userspace
to mmap() the resulting dma-buf even when this is supported by the
DRM driver.
It is trivial to relax the restriction and permit read/write access.
This is safe because the flags are seldom touched by drm; mostly they
are passed verbatim to dma_buf calls.
Strictly speaking shouldn't this patch be the last one in the series ?
I.e. we should lift this restriction, after the sync method
(ioctl/syscall/etc.) is in place. Or perhaps I missed something ?
I think you're right about it, Emil.
Thank you,
Tiago
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