From: David Woodhouse <dwmw2@infradead.org>
Date: Wed, 23 Apr 2008 14:40:52 +0000 (+0100)
Subject: [JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure.
X-Git-Tag: v2.6.26-rc1~1069^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=422b120238130307da64fa44c9fb722bfaf5f1af;p=pandora-kernel.git

[JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure.

When _all_ the blocks were on the erase_pending_list, we could't find a
block to GC from but there was no _actually_ free space, and
jffs2_reserve_space() would get a little unhappy.

Handle this case by returning -EAGAIN from jffs2_garbage_collect_pass().
There are two callers of that function -- jffs2_flush_wbuf_gc(), which
will interpret it as an error and flush the writebuffer by other means,
and jffs2_reserve_space(), which we modify to respond to -EAGAIN with an
immediate call to jffs2_erase_pending_blocks() and another run round the
loop.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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