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author | David Woodhouse <dwmw2@infradead.org> | 2006-05-21 13:15:59 +0100 |
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committer | David Woodhouse <dwmw2@infradead.org> | 2006-05-21 13:15:59 +0100 |
commit | 010b06d6d07d9fa5ea6070aa72bb3e0de1761ab7 (patch) | |
tree | 96c6ceddfec1aa6ddcdd0efcb39f903b284203c2 /fs | |
parent | 9167e0f811cbe28564c44a99c2f07b0ce5b368cf (diff) | |
download | kernel_samsung_smdk4412-010b06d6d07d9fa5ea6070aa72bb3e0de1761ab7.zip kernel_samsung_smdk4412-010b06d6d07d9fa5ea6070aa72bb3e0de1761ab7.tar.gz kernel_samsung_smdk4412-010b06d6d07d9fa5ea6070aa72bb3e0de1761ab7.tar.bz2 |
[JFFS2] Locking issues in summary write code.
We can't use jffs2_scan_dirty_space() because it doesn't do any locking; it's
only for use at scan time -- hence the 'scan' in the name.
Also, don't allocate refs while we have c->erase_completion_lock held.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/jffs2/summary.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/fs/jffs2/summary.c b/fs/jffs2/summary.c index 5a59c618..1451732 100644 --- a/fs/jffs2/summary.c +++ b/fs/jffs2/summary.c @@ -835,19 +835,32 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock spin_unlock(&c->erase_completion_lock); ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size - jeb->free_size, &retlen, 0); - spin_lock(&c->erase_completion_lock); - if (ret || (retlen != infosize)) { + struct jffs2_raw_node_ref *ref; + JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen); + /* Waste remaining space */ + ref = jffs2_alloc_raw_node_ref(); + if (ref) { + spin_lock(&c->erase_completion_lock); + + ref->flash_offset = jeb->offset + c->sector_size - jeb->free_size; + ref->flash_offset |= REF_OBSOLETE; + ref->next_in_ino = 0; + + jffs2_link_node_ref(c, jeb, ref, c->sector_size - jeb->free_size); + } + c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; - jffs2_scan_dirty_space(c, jeb, infosize); return 1; } + spin_lock(&c->erase_completion_lock); + return 0; } @@ -890,7 +903,6 @@ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) /* for ACCT_PARANOIA_CHECK */ spin_unlock(&c->erase_completion_lock); summary_ref = jffs2_alloc_raw_node_ref(); - spin_lock(&c->erase_completion_lock); if (!summary_ref) { JFFS2_NOTICE("Failed to allocate node ref for summary\n"); @@ -900,6 +912,7 @@ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) summary_ref->next_in_ino = NULL; summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL; + spin_lock(&c->erase_completion_lock); jffs2_link_node_ref(c, jeb, summary_ref, infosize); return 0; |