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Old 04-17-2008, 08:39 AM
 
Default Fix bug where we called drop_bh incorrectly

From: Steven Whitehouse <swhiteho@redhat.com>

As a result of an earlier patch, drop_bh was being called in cases
when it shouldn't have been. Since we never have a gh in the drop
case and we always have a gh in the promote case, we can use that
extra information to tell which case has been seen.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Bob Peterson <rpeterso@redhat.com>

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index d00dc37..63981e2 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -765,7 +765,6 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
const struct gfs2_glock_operations *glops = gl->gl_ops;
- struct gfs2_holder *gh = gl->gl_req_gh;

gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags));
gfs2_assert_warn(sdp, list_empty(&gl->gl_holders));
@@ -776,23 +775,11 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret)
if (glops->go_inval)
glops->go_inval(gl, DIO_METADATA);

- if (gh) {
- spin_lock(&gl->gl_spin);
- list_del_init(&gh->gh_list);
- gh->gh_error = 0;
- spin_unlock(&gl->gl_spin);
- }
-
spin_lock(&gl->gl_spin);
gfs2_demote_wake(gl);
- gl->gl_req_gh = NULL;
clear_bit(GLF_LOCK, &gl->gl_flags);
spin_unlock(&gl->gl_spin);
-
gfs2_glock_put(gl);
-
- if (gh)
- gfs2_holder_wake(gh);
}

/**
@@ -810,7 +797,7 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret)
int prev_state = gl->gl_state;
int op_done = 1;

- if ((ret & LM_OUT_ST_MASK) == LM_ST_UNLOCKED) {
+ if (!gh && (ret & LM_OUT_ST_MASK) == LM_ST_UNLOCKED) {
drop_bh(gl, ret);
return;
}
--
1.5.1.2
 

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