[PATCH 12/14] misc: bcm-vk: convert mmap hook to mmap_prepare

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

Move from the deprecated mmap hook to the new mmap_prepare hook, using the
I/O PFN remap mmap action to map the BAR.

Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
---
 drivers/misc/bcm-vk/bcm_vk_dev.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/misc/bcm-vk/bcm_vk_dev.c b/drivers/misc/bcm-vk/bcm_vk_dev.c
index 88ee3a417616..25a2b46ebad9 100644
--- a/drivers/misc/bcm-vk/bcm_vk_dev.c
+++ b/drivers/misc/bcm-vk/bcm_vk_dev.c
@@ -1201,9 +1201,9 @@ static long bcm_vk_reset(struct bcm_vk *vk, struct vk_reset __user *arg)
 	return ret;
 }
 
-static int bcm_vk_mmap(struct file *file, struct vm_area_struct *vma)
+static int bcm_vk_mmap_prepare(struct vm_area_desc *desc)
 {
-	struct bcm_vk_ctx *ctx = file->private_data;
+	struct bcm_vk_ctx *ctx = desc->file->private_data;
 	struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev);
 	unsigned long pg_size;
 
@@ -1212,16 +1212,16 @@ static int bcm_vk_mmap(struct file *file, struct vm_area_struct *vma)
 
 	pg_size = ((pci_resource_len(vk->pdev, VK_MMAPABLE_BAR) - 1)
 		    >> PAGE_SHIFT) + 1;
-	if (vma->vm_pgoff + vma_pages(vma) > pg_size)
+	if (desc->pgoff + vma_desc_pages(desc) > pg_size)
 		return -EINVAL;
 
-	vma->vm_pgoff += (pci_resource_start(vk->pdev, VK_MMAPABLE_BAR)
-			  >> PAGE_SHIFT);
-	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+	desc->pgoff += (pci_resource_start(vk->pdev, VK_MMAPABLE_BAR)
+			>> PAGE_SHIFT);
+	desc->page_prot = pgprot_noncached(desc->page_prot);
+
+	mmap_action_ioremap_full(desc, desc->pgoff);
 
-	return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
-				  vma->vm_end - vma->vm_start,
-				  vma->vm_page_prot);
+	return 0;
 }
 
 static long bcm_vk_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
@@ -1262,7 +1262,7 @@ static const struct file_operations bcm_vk_fops = {
 	.write = bcm_vk_write,
 	.poll = bcm_vk_poll,
 	.release = bcm_vk_release,
-	.mmap = bcm_vk_mmap,
+	.mmap_prepare = bcm_vk_mmap_prepare,
 	.unlocked_ioctl = bcm_vk_ioctl,
 };
 

-- 
2.56.0