drm/ati_pcigart: Fix error code in drm_ati_pcigart_init()

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.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181217070344.GC12159@kadam

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)