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drm/etnaviv: check for errors when enabling clocks 

clk_prepare_enable() may fail, so we should better check for its return
value and propagate it in the case of failure.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
This commit is contained in:
Fabio Estevam 2016-08-21 19:32:13 -03:00 committed by Lucas Stach
parent d985349017
commit 9e59eea66f
1 changed files with 24 additions and 6 deletions
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30
drivers/gpu/drm/etnaviv/etnaviv_gpu.c
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@ -872,12 +872,25 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
*/
static int enable_clk(struct etnaviv_gpu *gpu)
{
if (gpu->clk_core)
clk_prepare_enable(gpu->clk_core);
if (gpu->clk_shader)
clk_prepare_enable(gpu->clk_shader);
int ret;
if (gpu->clk_core) {
ret = clk_prepare_enable(gpu->clk_core);
if (ret)
return ret;
}
if (gpu->clk_shader) {
ret = clk_prepare_enable(gpu->clk_shader);
if (ret)
goto disable_clk_core;
}
return 0;
disable_clk_core:
clk_disable_unprepare(gpu->clk_core);
return ret;
}
static int disable_clk(struct etnaviv_gpu *gpu)
@ -892,8 +905,13 @@ static int disable_clk(struct etnaviv_gpu *gpu)
static int enable_axi(struct etnaviv_gpu *gpu)
{
if (gpu->clk_bus)
clk_prepare_enable(gpu->clk_bus);
int ret;
if (gpu->clk_bus) {
ret = clk_prepare_enable(gpu->clk_bus);
if (ret)
return ret;
}
return 0;
}