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gpu: nvgpu: return error if GPU not initialized

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While writing to sysfs "tpc_fs_mask", we need to have
GPU initialized (we need to have called gk20a_busy()
at least once before)

If this is not happened yet, then return error

Bug 1456969

Change-Id: I09db6bcaa44b8939246cb5ed1205f3fbc0ee0552
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/731327
(cherry picked from commit 0dbbcf60bbad6b9a31392d2290a3e26c5daa1e5d)
Reviewed-on: http://git-master/r/731671
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
This commit is contained in:
Deepak Nibade
2015-04-14 19:36:50 +05:30
committed by Ishan Mittal
parent 916a557bd6
commit 087ce7301b
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/nvgpu/gk20a/gk20a_sysfs.c
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@@ -615,6 +615,9 @@ static ssize_t tpc_fs_mask_store(struct device *device,
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
if (!g->gr.gpc_tpc_mask)
return -ENODEV;
if (val && val != g->gr.gpc_tpc_mask[0] && g->ops.gr.set_gpc_tpc_mask) {
g->gr.gpc_tpc_mask[0] = val;