[XFS] Automatically set logbsize for larger stripe units

SGI Modid: 2.5.x-xfs:slinx:157534a

fs/xfs/xfs_vfsops.c

@@ -331,9 +331,10 @@ xfs_finish_flags(
 {
 	/* Fail a mount where the logbuf is smaller then the log stripe */
 	if (XFS_SB_VERSION_HASLOGV2(&mp->m_sb)) {
-		if (((ap->logbufsize == -1) &&
-		     (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) ||
-		    (ap->logbufsize < mp->m_sb.sb_logsunit)) {
+		if ((ap->logbufsize == -1) &&
+		    (mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE)) {
+			mp->m_logbsize = mp->m_sb.sb_logsunit;
+		} else if (ap->logbufsize < mp->m_sb.sb_logsunit) {
 			cmn_err(CE_WARN,
 	"XFS: logbuf size must be greater than or equal to log stripe size");
 			return XFS_ERROR(EINVAL);