On 07/01/2020 22:46, Arnd Bergmann wrote:
> Casting a pointer to dma_addr_t produces a warning:
>
> drivers/gpu/drm/meson/meson_rdma.c: In function 'meson_rdma_free':
> drivers/gpu/drm/meson/meson_rdma.c:59:25: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
> priv->rdma.addr_phys = (dma_addr_t)NULL;
>
> In this case, it's worse because the variable name has the suffix
> '_phys', which often indicates a phys_addr_t rather than dma_addr_t,
> i.e. yet another incompatible type.
>
> Change it to use consistent naming and avoid NULL.
>
> Fixes: 63fba242c464 ("drm/meson: add RDMA module driver")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/gpu/drm/meson/meson_drv.h | 2 +-
> drivers/gpu/drm/meson/meson_rdma.c | 12 ++++++------
> 2 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/meson/meson_drv.h b/drivers/gpu/drm/meson/meson_drv.h
> index f9a0c8e9d4d0..04fdf3826643 100644
> --- a/drivers/gpu/drm/meson/meson_drv.h
> +++ b/drivers/gpu/drm/meson/meson_drv.h
> @@ -135,7 +135,7 @@ struct meson_drm {
> } venc;
>
> struct {
> - dma_addr_t addr_phys;
> + dma_addr_t addr_dma;
> uint32_t *addr;
> unsigned int offset;
> } rdma;
> diff --git a/drivers/gpu/drm/meson/meson_rdma.c b/drivers/gpu/drm/meson/meson_rdma.c
> index 25b34b1e72a7..130382178c63 100644
> --- a/drivers/gpu/drm/meson/meson_rdma.c
> +++ b/drivers/gpu/drm/meson/meson_rdma.c
> @@ -27,7 +27,7 @@ int meson_rdma_init(struct meson_drm *priv)
> /* Allocate a PAGE buffer */
> priv->rdma.addr =
> dma_alloc_coherent(priv->dev, SZ_4K,
> - &priv->rdma.addr_phys,
> + &priv->rdma.addr_dma,
> GFP_KERNEL);
> if (!priv->rdma.addr)
> return -ENOMEM;
> @@ -47,16 +47,16 @@ int meson_rdma_init(struct meson_drm *priv)
>
> void meson_rdma_free(struct meson_drm *priv)
> {
> - if (!priv->rdma.addr && !priv->rdma.addr_phys)
> + if (!priv->rdma.addr && !priv->rdma.addr_dma)
> return;
>
> meson_rdma_stop(priv);
>
> dma_free_coherent(priv->dev, SZ_4K,
> - priv->rdma.addr, priv->rdma.addr_phys);
> + priv->rdma.addr, priv->rdma.addr_dma);
>
> priv->rdma.addr = NULL;
> - priv->rdma.addr_phys = (dma_addr_t)NULL;
> + priv->rdma.addr_dma = (dma_addr_t)0;
> }
>
> void meson_rdma_setup(struct meson_drm *priv)
> @@ -118,11 +118,11 @@ void meson_rdma_flush(struct meson_drm *priv)
> meson_rdma_stop(priv);
>
> /* Start of Channel 1 register writes buffer */
> - writel(priv->rdma.addr_phys,
> + writel(priv->rdma.addr_dma,
> priv->io_base + _REG(RDMA_AHB_START_ADDR_1));
>
> /* Last byte on Channel 1 register writes buffer */
> - writel(priv->rdma.addr_phys + (priv->rdma.offset * RDMA_DESC_SIZE) - 1,
> + writel(priv->rdma.addr_dma + (priv->rdma.offset * RDMA_DESC_SIZE) - 1,
> priv->io_base + _REG(RDMA_AHB_END_ADDR_1));
>
> /* Trigger Channel 1 on VSYNC event */
>
Acked-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Applying to drm-misc-fixes
Thanks,
Neil
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