> -----Original Message----- > From: amd-gfx [mailto:[email protected]] On Behalf > Of Tom St Denis > Sent: Tuesday, May 23, 2017 11:59 AM > To: [email protected] > Cc: StDenis, Tom > Subject: [PATCH] drm/amd/amdgpu: Return error if initiating read out of > range on vram > > If you initiate a read that is out of the VRAM address space return > ENXIO instead of 0. > > Reads that begin below that point will read upto the VRAM limit as > before. > > Signed-off-by: Tom St Denis <[email protected]>
Reviewed-by: Alex Deucher <[email protected]> > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > index 522f773203c8..399209495265 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c > @@ -1468,6 +1468,9 @@ static ssize_t amdgpu_ttm_vram_read(struct file > *f, char __user *buf, > if (size & 0x3 || *pos & 0x3) > return -EINVAL; > > + if (*pos >= adev->mc.mc_vram_size) > + return -ENXIO; > + > while (size) { > unsigned long flags; > uint32_t value; > -- > 2.12.0 > > _______________________________________________ > amd-gfx mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/amd-gfx _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
