Merge commit 'v2.6.28-rc8' into x86/doc

1 files changed, 36 insertions, 3 deletions

diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 0b02c644355..3608a0f0a5f 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -563,6 +563,11 @@ xfs_log_mount(
 	}
 
 	mp->m_log = xlog_alloc_log(mp, log_target, blk_offset, num_bblks);
+	if (!mp->m_log) {
+		cmn_err(CE_WARN, "XFS: Log allocation failed: No memory!");
+		error = ENOMEM;
+		goto out;
+	}
 
 	/*
 	 * Initialize the AIL now we have a log.
@@ -601,6 +606,7 @@ xfs_log_mount(
 	return 0;
 error:
 	xfs_log_unmount_dealloc(mp);
+out:
 	return error;
 }	/* xfs_log_mount */
 
@@ -1217,7 +1223,9 @@ xlog_alloc_log(xfs_mount_t	*mp,
 	int			i;
 	int			iclogsize;
 
-	log = (xlog_t *)kmem_zalloc(sizeof(xlog_t), KM_SLEEP);
+	log = kmem_zalloc(sizeof(xlog_t), KM_MAYFAIL);
+	if (!log)
+		return NULL;
 
 	log->l_mp	   = mp;
 	log->l_targ	   = log_target;
@@ -1249,6 +1257,8 @@ xlog_alloc_log(xfs_mount_t	*mp,
 	xlog_get_iclog_buffer_size(mp, log);
 
 	bp = xfs_buf_get_empty(log->l_iclog_size, mp->m_logdev_targp);
+	if (!bp)
+		goto out_free_log;
 	XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
 	XFS_BUF_SET_BDSTRAT_FUNC(bp, xlog_bdstrat_cb);
 	XFS_BUF_SET_FSPRIVATE2(bp, (unsigned long)1);
@@ -1275,13 +1285,17 @@ xlog_alloc_log(xfs_mount_t	*mp,
 	iclogsize = log->l_iclog_size;
 	ASSERT(log->l_iclog_size >= 4096);
 	for (i=0; i < log->l_iclog_bufs; i++) {
-		*iclogp = (xlog_in_core_t *)
-			  kmem_zalloc(sizeof(xlog_in_core_t), KM_SLEEP);
+		*iclogp = kmem_zalloc(sizeof(xlog_in_core_t), KM_MAYFAIL);
+		if (!*iclogp)
+			goto out_free_iclog;
+
 		iclog = *iclogp;
 		iclog->ic_prev = prev_iclog;
 		prev_iclog = iclog;
 
 		bp = xfs_buf_get_noaddr(log->l_iclog_size, mp->m_logdev_targp);
+		if (!bp)
+			goto out_free_iclog;
 		if (!XFS_BUF_CPSEMA(bp))
 			ASSERT(0);
 		XFS_BUF_SET_IODONE_FUNC(bp, xlog_iodone);
@@ -1323,6 +1337,25 @@ xlog_alloc_log(xfs_mount_t	*mp,
 	log->l_iclog->ic_prev = prev_iclog;	/* re-write 1st prev ptr */
 
 	return log;
+
+out_free_iclog:
+	for (iclog = log->l_iclog; iclog; iclog = prev_iclog) {
+		prev_iclog = iclog->ic_next;
+		if (iclog->ic_bp) {
+			sv_destroy(&iclog->ic_force_wait);
+			sv_destroy(&iclog->ic_write_wait);
+			xfs_buf_free(iclog->ic_bp);
+			xlog_trace_iclog_dealloc(iclog);
+		}
+		kmem_free(iclog);
+	}
+	spinlock_destroy(&log->l_icloglock);
+	spinlock_destroy(&log->l_grant_lock);
+	xlog_trace_loggrant_dealloc(log);
+	xfs_buf_free(log->l_xbuf);
+out_free_log:
+	kmem_free(log);
+	return NULL;
 }	/* xlog_alloc_log */