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authorWen Yang <wen.yang99@zte.com.cn>2019-04-04 00:04:11 +0800
committerRob Clark <robdclark@chromium.org>2019-04-18 10:04:10 -0700
commit6cd5235c3135ea84b32469ea51b2aae384eda8af (patch)
tree5c073f5f4943a53f1ed4519f58fba3e7607ed87a /drivers/gpu/drm/msm/adreno/a5xx_gpu.c
parente1505f627e2edaf9ba6cad4a352d897db1f99ef3 (diff)
drm/msm: a5xx: fix possible object reference leak
The call to of_get_child_by_name returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: drivers/gpu/drm/msm/adreno/a5xx_gpu.c:57:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function. drivers/gpu/drm/msm/adreno/a5xx_gpu.c:66:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function. drivers/gpu/drm/msm/adreno/a5xx_gpu.c:118:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 47, but without a corresponding object release within this function. drivers/gpu/drm/msm/adreno/a5xx_gpu.c:57:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function. drivers/gpu/drm/msm/adreno/a5xx_gpu.c:66:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function. drivers/gpu/drm/msm/adreno/a5xx_gpu.c:118:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 51, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Rob Clark <robdclark@gmail.com> Cc: Sean Paul <sean@poorly.run> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Jordan Crouse <jcrouse@codeaurora.org> Cc: Mamta Shukla <mamtashukla555@gmail.com> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: Sharat Masetty <smasetty@codeaurora.org> Cc: linux-arm-msm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org (open list) Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/adreno/a5xx_gpu.c')
-rw-r--r--drivers/gpu/drm/msm/adreno/a5xx_gpu.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index d5f5e56422f5..270da14cba67 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -34,7 +34,7 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname)
{
struct device *dev = &gpu->pdev->dev;
const struct firmware *fw;
- struct device_node *np;
+ struct device_node *np, *mem_np;
struct resource r;
phys_addr_t mem_phys;
ssize_t mem_size;
@@ -48,11 +48,13 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname)
if (!np)
return -ENODEV;
- np = of_parse_phandle(np, "memory-region", 0);
- if (!np)
+ mem_np = of_parse_phandle(np, "memory-region", 0);
+ of_node_put(np);
+ if (!mem_np)
return -EINVAL;
- ret = of_address_to_resource(np, 0, &r);
+ ret = of_address_to_resource(mem_np, 0, &r);
+ of_node_put(mem_np);
if (ret)
return ret;