On Mon, Dec 17, 2018 at 10:03:44AM +0300, Dan Carpenter wrote:
> The drm_ati_pcigart_init() function was originally suppose to return one
> on success and zero on failure, but these days it returns a mix of
> zero, one and -ENOMEM on failure.
>
> This patch cleans it up and modifies the caller so now the function
> returns zero on success and negative error codes on failure.
>
> Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Queued for 4.22, thanks for your patch.
-Daniel
> ---
> drivers/gpu/drm/ati_pcigart.c | 7 ++++---
> drivers/gpu/drm/r128/r128_cce.c | 5 +++--
> 2 files changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/ati_pcigart.c b/drivers/gpu/drm/ati_pcigart.c
> index 6c4d4b6eba80..2362f07fe1fc 100644
> --- a/drivers/gpu/drm/ati_pcigart.c
> +++ b/drivers/gpu/drm/ati_pcigart.c
> @@ -103,7 +103,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct
> drm_ati_pcigart_info *ga
> unsigned long pages;
> u32 *pci_gart = NULL, page_base, gart_idx;
> dma_addr_t bus_address = 0;
> - int i, j, ret = 0;
> + int i, j, ret = -ENOMEM;
> int max_ati_pages, max_real_pages;
>
> if (!entry) {
> @@ -117,7 +117,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct
> drm_ati_pcigart_info *ga
> if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
> DRM_ERROR("fail to set dma mask to 0x%Lx\n",
> (unsigned long long)gart_info->table_mask);
> - ret = 1;
> + ret = -EFAULT;
> goto done;
> }
>
> @@ -160,6 +160,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct
> drm_ati_pcigart_info *ga
> drm_ati_pcigart_cleanup(dev, gart_info);
> address = NULL;
> bus_address = 0;
> + ret = -ENOMEM;
> goto done;
> }
> page_base = (u32) entry->busaddr[i];
> @@ -188,7 +189,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct
> drm_ati_pcigart_info *ga
> page_base += ATI_PCIGART_PAGE_SIZE;
> }
> }
> - ret = 1;
> + ret = 0;
>
> #if defined(__i386__) || defined(__x86_64__)
> wbinvd();
> diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c
> index c9890afe69d6..b91af1bf531b 100644
> --- a/drivers/gpu/drm/r128/r128_cce.c
> +++ b/drivers/gpu/drm/r128/r128_cce.c
> @@ -560,11 +560,12 @@ static int r128_do_init_cce(struct drm_device *dev,
> drm_r128_init_t *init)
> dev_priv->gart_info.addr = NULL;
> dev_priv->gart_info.bus_addr = 0;
> dev_priv->gart_info.gart_reg_if = DRM_ATI_GART_PCI;
> - if (!drm_ati_pcigart_init(dev, &dev_priv->gart_info)) {
> + rc = drm_ati_pcigart_init(dev, &dev_priv->gart_info);
> + if (rc) {
> DRM_ERROR("failed to init PCI GART!\n");
> dev->dev_private = (void *)dev_priv;
> r128_do_cleanup_cce(dev);
> - return -ENOMEM;
> + return rc;
> }
> R128_WRITE(R128_PCI_GART_PAGE, dev_priv->gart_info.bus_addr);
> #if IS_ENABLED(CONFIG_AGP)
> --
> 2.17.1
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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