[JFFS2] Don't advance c->wbuf_ofs to next eraseblock after wbuf flush
After flushing the last page of an eraseblock, don't leave the
wbuf 'offset' field pointing at the start of the next physical
eraseblock. This was causing a BUG() on NOR-ECC (Sibley) flash, where
we start writing a little further in, after the cleanmarker.
Debugged by Alexander Belyakov <abelyako@googlemail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/jffs2/wbuf.c b/fs/jffs2/wbuf.c
index c556e85..91d1d0f 100644
--- a/fs/jffs2/wbuf.c
+++ b/fs/jffs2/wbuf.c
@@ -637,7 +637,10 @@
memset(c->wbuf,0xff,c->wbuf_pagesize);
/* adjust write buffer offset, else we get a non contiguous write bug */
- c->wbuf_ofs += c->wbuf_pagesize;
+ if (SECTOR_ADDR(c->wbuf_ofs) == SECTOR_ADDR(c->wbuf_ofs+c->wbuf_pagesize))
+ c->wbuf_ofs += c->wbuf_pagesize;
+ else
+ c->wbuf_ofs = 0xffffffff;
c->wbuf_len = 0;
return 0;
}