efi: Correct the operation of efi_file_write()

We should not directly cast between pointers and addresses since it breaks
sandbox. Fix this and simplify the code in file_read().

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
index 84be0d5..7edec90 100644 (file)
--- a/lib/efi_loader/efi_file.c
+++ b/lib/efi_loader/efi_file.c
@@ -292,10 +292,8 @@ static efi_status_t file_read(struct file_handle *fh, u64 *buffer_size,
                void *buffer)
 {
        loff_t actread;
-       /* fs_read expects buffer address, not pointer */
-       uintptr_t buffer_addr = (uintptr_t)map_to_sysmem(buffer);
 
-       if (fs_read(fh->path, buffer_addr, fh->offset,
+       if (fs_read(fh->path, map_to_sysmem(buffer), fh->offset,
                    *buffer_size, &actread))
                return EFI_DEVICE_ERROR;
 
@@ -425,7 +423,7 @@ static efi_status_t EFIAPI efi_file_write(struct efi_file_handle *file,
                goto error;
        }
 
-       if (fs_write(fh->path, (ulong)buffer, fh->offset, *buffer_size,
+       if (fs_write(fh->path, map_to_sysmem(buffer), fh->offset, *buffer_size,
                     &actwrite)) {
                ret = EFI_DEVICE_ERROR;
                goto error;