[PATCH] fix MGA DRM regression before 2.6.14

[safe/jmp/linux-2.6] / drivers / char / drm / mga_dma.c

diff --git a/drivers/char/drm/mga_dma.c b/drivers/char/drm/mga_dma.c
index fc7d4a5..c8e1b6c 100644 (file)
--- a/drivers/char/drm/mga_dma.c
+++ b/drivers/char/drm/mga_dma.c
@@ -437,7 +437,7 @@ static int mga_do_agp_dma_bootstrap(drm_device_t * dev,
                                    drm_mga_dma_bootstrap_t * dma_bs)
 {
        drm_mga_private_t * const dev_priv = (drm_mga_private_t *) dev->dev_private;
-       const unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+       unsigned int warp_size = mga_warp_microcode_size(dev_priv);
        int err;
        unsigned  offset;
        const unsigned secondary_size = dma_bs->secondary_bin_count
@@ -499,6 +499,12 @@ static int mga_do_agp_dma_bootstrap(drm_device_t * dev,
                return err;
        }
 
+       /* Make drm_addbufs happy by not trying to create a mapping for less
+        * than a page.
+        */
+       if (warp_size < PAGE_SIZE)
+               warp_size = PAGE_SIZE;
+
        offset = 0;
        err = drm_addmap( dev, offset, warp_size,
                          _DRM_AGP, _DRM_READ_ONLY, & dev_priv->warp );
@@ -587,7 +593,7 @@ static int mga_do_pci_dma_bootstrap(drm_device_t * dev,
                                    drm_mga_dma_bootstrap_t * dma_bs)
 {
        drm_mga_private_t * const dev_priv = (drm_mga_private_t *) dev->dev_private;
-       const unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+       unsigned int warp_size = mga_warp_microcode_size(dev_priv);
        unsigned int primary_size;
        unsigned int bin_count;
        int err;
@@ -599,6 +605,12 @@ static int mga_do_pci_dma_bootstrap(drm_device_t * dev,
                return DRM_ERR(EFAULT);
        }
 
+       /* Make drm_addbufs happy by not trying to create a mapping for less
+        * than a page.
+        */
+       if (warp_size < PAGE_SIZE)
+               warp_size = PAGE_SIZE;
+
        /* The proper alignment is 0x100 for this mapping */
        err = drm_addmap(dev, 0, warp_size, _DRM_CONSISTENT,
                         _DRM_READ_ONLY, &dev_priv->warp);
@@ -812,6 +824,10 @@ static int mga_do_init_dma( drm_device_t *dev, drm_mga_init_t *init )
        }
 
        if (! dev_priv->used_new_dma_init) {
+
+               dev_priv->dma_access = MGA_PAGPXFER;
+               dev_priv->wagp_enable = MGA_WAGP_ENABLE;
+
                dev_priv->status = drm_core_findmap(dev, init->status_offset);
                if (!dev_priv->status) {
                        DRM_ERROR("failed to find status page!\n");
@@ -928,7 +944,7 @@ static int mga_do_cleanup_dma( drm_device_t *dev )
                drm_mga_private_t *dev_priv = dev->dev_private;
 
                if ((dev_priv->warp != NULL) 
-                   && (dev_priv->mmio->type != _DRM_CONSISTENT))
+                   && (dev_priv->warp->type != _DRM_CONSISTENT))
                        drm_core_ioremapfree(dev_priv->warp, dev);
 
                if ((dev_priv->primary != NULL)