bcm63xx_uart: Use the device name when registering an interrupt

[linux-2.6-block.git] / fs / dax.c

diff --git a/fs/dax.c b/fs/dax.c
index 131fd35ae39d53f8a9ef7bdd1aaa61677beda5f0..d1e5cb7311a1de295ecd4348360a9a9947e71142 100644 (file)
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -174,8 +174,10 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
                else
                        len = iov_iter_zero(max - pos, iter);
 
-               if (!len)
+               if (!len) {
+                       retval = -EFAULT;
                        break;
+               }
 
                pos += len;
                addr += len;
@@ -627,6 +629,13 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
                if ((length < PMD_SIZE) || (pfn & PG_PMD_COLOUR))
                        goto fallback;
 
+               /*
+                * TODO: teach vmf_insert_pfn_pmd() to support
+                * 'pte_special' for pmds
+                */
+               if (pfn_valid(pfn))
+                       goto fallback;
+
                if (buffer_unwritten(&bh) || buffer_new(&bh)) {
                        int i;
                        for (i = 0; i < PTRS_PER_PMD; i++)