[PATCH 3/3] drm/vmwgfx: Adjust checks for null pointers in 13 functions

SF Markus Elfring
2016-09-23T16:39:04Z

Date: Fri, 23 Sep 2016 17:53:49 +0200
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The script "checkpatch.pl" can point information out like the following.

Comparison to NULL could be written !…

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
index 15504c6..b445ce9 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
@@ -324,7 +324,7 @@ static void vmw_hw_surface_destroy(struct vmw_resource *res)
if (res->id != -1) {

cmd = vmw_fifo_reserve(dev_priv, vmw_surface_destroy_size());
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"destruction.\n");
return;
@@ -397,7 +397,7 @@ static int vmw_legacy_srf_create(struct vmw_resource *res)

submit_size = vmw_surface_define_size(srf);
cmd = vmw_fifo_reserve(dev_priv, submit_size);
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"creation.\n");
ret = -ENOMEM;
@@ -446,11 +446,10 @@ static int vmw_legacy_srf_dma(struct vmw_resource *res,
uint8_t *cmd;
struct vmw_private *dev_priv = res->dev_priv;

- BUG_ON(val_buf->bo = NULL);
-
+ BUG_ON(!val_buf->bo);
submit_size = vmw_surface_dma_size(srf);
cmd = vmw_fifo_reserve(dev_priv, submit_size);
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"DMA.\n");
return -ENOMEM;
@@ -538,7 +537,7 @@ static int vmw_legacy_srf_destroy(struct vmw_resource *res)

submit_size = vmw_surface_destroy_size();
cmd = vmw_fifo_reserve(dev_priv, submit_size);
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"eviction.\n");
return -ENOMEM;
@@ -578,7 +577,7 @@ static int vmw_surface_init(struct vmw_private *dev_priv,
int ret;
struct vmw_resource *res = &srf->res;

- BUG_ON(res_free = NULL);
+ BUG_ON(!res_free);
if (!dev_priv->has_mob)
vmw_fifo_resource_inc(dev_priv);
ret = vmw_resource_init(dev_priv, res, true, res_free,
@@ -747,7 +746,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
}

user_srf = kzalloc(sizeof(*user_srf), GFP_KERNEL);
- if (unlikely(user_srf = NULL)) {
+ if (unlikely(!user_srf)) {
ret = -ENOMEM;
goto out_no_user_srf;
}
@@ -772,7 +771,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
srf->offsets = kmalloc_array(srf->num_sizes,
sizeof(*srf->offsets),
GFP_KERNEL);
- if (unlikely(srf->offsets = NULL)) {
+ if (unlikely(!srf->offsets)) {
ret = -ENOMEM;
goto out_no_offsets;
}
@@ -914,7 +913,7 @@ vmw_surface_handle_reference(struct vmw_private *dev_priv,

ret = -EINVAL;
base = ttm_base_object_lookup_for_ref(dev_priv->tdev, handle);
- if (unlikely(base = NULL)) {
+ if (unlikely(!base)) {
DRM_ERROR("Could not find surface to reference.\n");
goto out_no_lookup;
}
@@ -1060,7 +1059,7 @@ static int vmw_gb_surface_create(struct vmw_resource *res)

cmd = vmw_fifo_reserve(dev_priv, submit_len);
cmd2 = (typeof(cmd2))cmd;
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"creation.\n");
ret = -ENOMEM;
@@ -1126,7 +1125,7 @@ static int vmw_gb_surface_bind(struct vmw_resource *res,
submit_size = sizeof(*cmd1) + (res->backup_dirty ? sizeof(*cmd2) : 0);

cmd1 = vmw_fifo_reserve(dev_priv, submit_size);
- if (unlikely(cmd1 = NULL)) {
+ if (unlikely(!cmd1)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"binding.\n");
return -ENOMEM;
@@ -1176,7 +1175,7 @@ static int vmw_gb_surface_unbind(struct vmw_resource *res,

submit_size = sizeof(*cmd3) + (readback ? sizeof(*cmd1) : sizeof(*cmd2));
cmd = vmw_fifo_reserve(dev_priv, submit_size);
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"unbinding.\n");
return -ENOMEM;
@@ -1235,7 +1234,7 @@ static int vmw_gb_surface_destroy(struct vmw_resource *res)
vmw_binding_res_list_scrub(&res->binding_head);

cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
- if (unlikely(cmd = NULL)) {
+ if (unlikely(!cmd)) {
DRM_ERROR("Failed reserving FIFO space for surface "
"destruction.\n");
mutex_unlock(&dev_priv->binding_mutex);
@@ -1401,7 +1400,7 @@ int vmw_gb_surface_reference_ioctl(struct drm_device *dev, void *data,

user_srf = container_of(base, struct vmw_user_surface, prime.base);
srf = &user_srf->srf;
- if (srf->res.backup = NULL) {
+ if (!srf->res.backup) {
DRM_ERROR("Shared GB surface is missing a backup buffer.\n");
goto out_bad_resource;
}
@@ -1515,7 +1514,7 @@ int vmw_surface_gb_priv_define(struct drm_device *dev,
}

user_srf = kzalloc(sizeof(*user_srf), GFP_KERNEL);
- if (unlikely(user_srf = NULL)) {
+ if (unlikely(!user_srf)) {
ret = -ENOMEM;
goto out_no_user_srf;
}
--
2.10.0

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