Re: [PATCH 1/2] media: platform: fsl-viu: add __iomem annotations

From: Mauro Carvalho Chehab
Date: Fri Apr 06 2018 - 10:28:22 EST


Em Fri, 6 Apr 2018 16:23:18 +0200
Arnd Bergmann <arnd@xxxxxxxx> escreveu:

> This avoids countless sparse warnings like
>
> drivers/media/platform/fsl-viu.c:1081:25: sparse: incorrect type in argument 2 (different address spaces)
> drivers/media/platform/fsl-viu.c:1082:25: sparse: incorrect type in argument 2 (different address spaces)

Heh, that's almost identical to this one:

https://git.linuxtv.org/mchehab/experimental.git/commit/?h=compile_test&id=457312e30430e83f9dc4bf1804acb15b91e5dfc1

>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/media/platform/fsl-viu.c | 26 +++++++++++++-------------
> 1 file changed, 13 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c
> index 200c47c69a75..cc85620267f1 100644
> --- a/drivers/media/platform/fsl-viu.c
> +++ b/drivers/media/platform/fsl-viu.c
> @@ -128,7 +128,7 @@ struct viu_dev {
> int dma_done;
>
> /* Hardware register area */
> - struct viu_reg *vr;
> + struct viu_reg __iomem *vr;
>
> /* Interrupt vector */
> int irq;
> @@ -244,7 +244,7 @@ struct viu_fmt *format_by_fourcc(int fourcc)
>
> void viu_start_dma(struct viu_dev *dev)
> {
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
>
> dev->field = 0;
>
> @@ -255,7 +255,7 @@ void viu_start_dma(struct viu_dev *dev)
>
> void viu_stop_dma(struct viu_dev *dev)
> {
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
> int cnt = 100;
> u32 status_cfg;
>
> @@ -395,7 +395,7 @@ static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf)
>
> inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf)
> {
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
> int bpp;
>
> /* setup the DMA base address */
> @@ -703,9 +703,9 @@ static int verify_preview(struct viu_dev *dev, struct v4l2_window *win)
> return 0;
> }
>
> -inline void viu_activate_overlay(struct viu_reg *viu_reg)
> +inline void viu_activate_overlay(struct viu_reg __iomem *viu_reg)
> {
> - struct viu_reg *vr = viu_reg;
> + struct viu_reg __iomem *vr = viu_reg;
>
> out_be32(&vr->field_base_addr, reg_val.field_base_addr);
> out_be32(&vr->dma_inc, reg_val.dma_inc);
> @@ -985,9 +985,9 @@ inline void viu_activate_next_buf(struct viu_dev *dev,
> }
> }
>
> -inline void viu_default_settings(struct viu_reg *viu_reg)
> +inline void viu_default_settings(struct viu_reg __iomem *viu_reg)
> {
> - struct viu_reg *vr = viu_reg;
> + struct viu_reg __iomem *vr = viu_reg;
>
> out_be32(&vr->luminance, 0x9512A254);
> out_be32(&vr->chroma_r, 0x03310000);
> @@ -1001,7 +1001,7 @@ inline void viu_default_settings(struct viu_reg *viu_reg)
>
> static void viu_overlay_intr(struct viu_dev *dev, u32 status)
> {
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
>
> if (status & INT_DMA_END_STATUS)
> dev->dma_done = 1;
> @@ -1032,7 +1032,7 @@ static void viu_overlay_intr(struct viu_dev *dev, u32 status)
> static void viu_capture_intr(struct viu_dev *dev, u32 status)
> {
> struct viu_dmaqueue *vidq = &dev->vidq;
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
> struct viu_buf *buf;
> int field_num;
> int need_two;
> @@ -1104,7 +1104,7 @@ static void viu_capture_intr(struct viu_dev *dev, u32 status)
> static irqreturn_t viu_intr(int irq, void *dev_id)
> {
> struct viu_dev *dev = (struct viu_dev *)dev_id;
> - struct viu_reg *vr = dev->vr;
> + struct viu_reg __iomem *vr = dev->vr;
> u32 status;
> u32 error;
>
> @@ -1169,7 +1169,7 @@ static int viu_open(struct file *file)
> struct video_device *vdev = video_devdata(file);
> struct viu_dev *dev = video_get_drvdata(vdev);
> struct viu_fh *fh;
> - struct viu_reg *vr;
> + struct viu_reg __iomem *vr;
> int minor = vdev->minor;
> u32 status_cfg;
>
> @@ -1305,7 +1305,7 @@ static int viu_release(struct file *file)
> return 0;
> }
>
> -void viu_reset(struct viu_reg *reg)
> +void viu_reset(struct viu_reg __iomem *reg)
> {
> out_be32(&reg->status_cfg, 0);
> out_be32(&reg->luminance, 0x9512a254);



Thanks,
Mauro