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gpu: nvgpu: add __must_check to gk20a_busy

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The return value of gk20a_busy must be checked since it may not succeed
in some cases. Add the __must_check attribute that generates a compiler
warning for code that does not read the return value and fix all uses of
the function to take error cases into account.

Bug 200040921

Change-Id: Ibc2b119985fa230324c88026fe94fc5f1894fe4f
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/542552
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Konsta Holtta
2014-09-26 16:05:41 +03:00
committed by Dan Willemsen
parent 79ab01debd
commit 2d0bcfa331
7 changed files with 58 additions and 17 deletions
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9
drivers/gpu/nvgpu/gk20a/debug_gk20a.c
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@@ -166,9 +166,14 @@ void gk20a_debug_show_dump(struct platform_device *pdev,
struct gk20a *g = platform->g;
struct fifo_gk20a *f = &g->fifo;
u32 chid;
int i;
int i, err;
err = gk20a_busy(g->dev);
if (err) {
gk20a_debug_output(o, "failed to power on gpu: %d\n", err);
return;
}
gk20a_busy(g->dev);
for (i = 0; i < fifo_pbdma_status__size_1_v(); i++) {
u32 status = gk20a_readl(g, fifo_pbdma_status_r(i));
u32 chan_status = fifo_pbdma_status_chan_status_v(status);