X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fdirect-io.c;h=b6d43908ff7a890f741c3076308c1a9da965f59b;hb=4539b35881ae9664b0e2953438dd83f5ee02c0b4;hp=af0558dbe8b75a65bbe975f6dede7390ff0dbeb9;hpb=9301975ec251bab1ad7cfcb84a688b26187e4e4a;p=pandora-kernel.git

diff --git a/fs/direct-io.c b/fs/direct-io.c
index af0558dbe8b7..b6d43908ff7a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1209,6 +1209,19 @@ __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
 	retval = direct_io_worker(rw, iocb, inode, iov, offset,
 				nr_segs, blkbits, get_block, end_io, dio);
 
+	/*
+	 * In case of error extending write may have instantiated a few
+	 * blocks outside i_size. Trim these off again for DIO_LOCKING.
+	 * NOTE: DIO_NO_LOCK/DIO_OWN_LOCK callers have to handle this by
+	 * it's own meaner.
+	 */
+	if (unlikely(retval < 0 && (rw & WRITE))) {
+		loff_t isize = i_size_read(inode);
+
+		if (end > isize && dio_lock_type == DIO_LOCKING)
+			vmtruncate(inode, isize);
+	}
+
 	if (rw == READ && dio_lock_type == DIO_LOCKING)
 		release_i_mutex = 0;