From: Hans Verkuil <hans.verk...@cisco.com>
The dma-contig and dma-sg memops require a valid struct device for
the DMA to be handled correctly.
Call WARN_ON and return ERR_PTR(-EINVAL) if it was NULL.
Setting the correct device pointer was forgotten in several new driver
submissions. This was caught during code review, but it really should be
caught in the code.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/videobuf2-dma-contig.c | 9 +++++++++
drivers/media/v4l2-core/videobuf2-dma-sg.c | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c
b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 863f658..925b34b 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -141,6 +141,9 @@ static void *vb2_dc_alloc(struct device *dev, const struct
dma_attrs *attrs,
{
struct vb2_dc_buf *buf;
+ if (WARN_ON(!dev))
+ return ERR_PTR(-EINVAL);
+
buf = kzalloc(sizeof *buf, GFP_KERNEL);
if (!buf)
return ERR_PTR(-ENOMEM);
@@ -499,6 +502,9 @@ static void *vb2_dc_get_userptr(struct device *dev,
unsigned long vaddr,
return ERR_PTR(-EINVAL);
}
+ if (WARN_ON(!dev))
+ return ERR_PTR(-EINVAL);
+
buf = kzalloc(sizeof *buf, GFP_KERNEL);
if (!buf)
return ERR_PTR(-ENOMEM);
@@ -679,6 +685,9 @@ static void *vb2_dc_attach_dmabuf(struct device *dev,
struct dma_buf *dbuf,
if (dbuf->size < size)
return ERR_PTR(-EFAULT);
+ if (WARN_ON(!dev))
+ return ERR_PTR(-EINVAL);
+
buf = kzalloc(sizeof(*buf), GFP_KERNEL);
if (!buf)
return ERR_PTR(-ENOMEM);
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c
b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index e2afd2c..64a386d 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -232,6 +232,9 @@ static void *vb2_dma_sg_get_userptr(struct device *dev,
unsigned long vaddr,
DEFINE_DMA_ATTRS(attrs);
struct frame_vector *vec;
+ if (WARN_ON(!dev))
+ return ERR_PTR(-EINVAL);
+
dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
buf = kzalloc(sizeof *buf, GFP_KERNEL);
if (!buf)
@@ -618,6 +621,9 @@ static void *vb2_dma_sg_attach_dmabuf(struct device *dev,
struct dma_buf *dbuf,
struct vb2_dma_sg_buf *buf;
struct dma_buf_attachment *dba;
+ if (WARN_ON(!dev))
+ return ERR_PTR(-EINVAL);
+
if (dbuf->size < size)
return ERR_PTR(-EFAULT);
--
2.8.1
--
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