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gpu: nvgpu: fix patch write error check in update_ctxsw_preemption_mode

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Don't attempt to access memory if the patch context can't be mapped, but
print an error message instead.

Change-Id: I374dc94d13674e0bd9d081b790f7c0dac834e868
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1157828
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Konsta Holtta
2016-05-25 13:23:52 +03:00
committed by Deepak Nibade
parent 4e321eb1c8
commit 11e9ba82de
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/nvgpu/gp10b/gr_gp10b.c
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@@ -1118,6 +1118,11 @@ static void gr_gp10b_update_ctxsw_preemption_mode(struct gk20a *g,
gr_ctx->t18x.preempt_ctxsw_buffer.gpu_va >> 8);
err = gr_gk20a_ctx_patch_write_begin(g, ch_ctx);
if (err) {
gk20a_err(dev_from_gk20a(g),
"can't map patch context");
goto out;
}
addr = (u64_lo32(gr_ctx->t18x.betacb_ctxsw_buffer.gpu_va) >>
gr_gpcs_setup_attrib_cb_base_addr_39_12_align_bits_v()) |
@@ -1169,6 +1174,7 @@ static void gr_gp10b_update_ctxsw_preemption_mode(struct gk20a *g,
gr_gk20a_ctx_patch_write_end(g, ch_ctx);
}
out:
gk20a_dbg_fn("done");
}