# HG changeset patch
# User jlarmour
# Date 1083222970 0
# Node ID d04fae1f5cdef548a7d3d5bf93029c46c30fe62f
# Parent  2aabaeffc1611295d7d830c2e7ba5365f7a4a6f1
	* src/build.c: JFFS2 can now be used as a write-once, read many mode
	for really small flash disks, e.g. configuration parameters.

diff --git a/packages/fs/jffs2/current/ChangeLog b/packages/fs/jffs2/current/ChangeLog
--- a/packages/fs/jffs2/current/ChangeLog
+++ b/packages/fs/jffs2/current/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-19  Oyvind Harboe <oyvind.harboe@zylin.com>
+	
+	* src/build.c: JFFS2 can now be used as a write-once, read many mode
+	for really small flash disks, e.g. configuration parameters.
+	
 2004-04-21  Gary Thomas  <gary@mlbassoc.com>
 
 	* src/fs-ecos.c: Merge from public MTD - verify file position
diff --git a/packages/fs/jffs2/current/src/build.c b/packages/fs/jffs2/current/src/build.c
--- a/packages/fs/jffs2/current/src/build.c
+++ b/packages/fs/jffs2/current/src/build.c
@@ -259,6 +259,14 @@ static void jffs2_calc_trigger_levels(st
 
 	c->resv_blocks_write = c->resv_blocks_deletion + (size / c->sector_size);
 
+	// If the flash disk is smaller than resv_blocks_write, then we 
+	// allow writing to the disk anyway. The flash disk is then most likely
+	// being used as write once - read many medimum, e.g. configuration of 
+	// static paramters.
+	if (c->resv_blocks_write * c->sector_size > c->flash_size) {
+	  c->resv_blocks_write = 0; 
+	}
+
 	/* When do we let the GC thread run in the background */
 
 	c->resv_blocks_gctrigger = c->resv_blocks_write + 1;