Konsta Holtta 16fc6e3931 gpu: nvgpu: protect missing sgl in gk20a_mem_phys ...

Return zero for missing sgl (sgt is already checked) instead of
attempting to dereference NULL. Those NULL conditions should be almost
nonexistent, and zero is not normally used.

When reading gk20a_mem_phys() in gk20a_gr_get_chid_from_ctx() from an
isr, the mem desc may race with channel deletion and get suddendly
zeroed, even if the channel's in_use flag would be set. Plain zero
results in expected behaviour.

Change-Id: I7033979091951cba3e3004ddc7550cd327ad0baf
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/737759
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

2015-05-18 11:33:27 +05:30

..

nvgpu

gpu: nvgpu: protect missing sgl in gk20a_mem_phys

2015-05-18 11:33:27 +05:30