macos: reset next vcache pointer after reacquiring xvcache

dropping the xvcache lock means that things can change out from under
us. in case they do, reset the next vcache pointer before looping

Change-Id: I71be39a2f2986804257c50b1d5b7d557b58a3573
Reviewed-on: http://gerrit.openafs.org/5184
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>

diff --git a/src/afs/DARWIN/osi_misc.c b/src/afs/DARWIN/osi_misc.c
index c602fb1..03792d9 100644 (file)
--- a/src/afs/DARWIN/osi_misc.c
+++ b/src/afs/DARWIN/osi_misc.c
@@ -90,6 +90,7 @@ loop:
                ReleaseWriteLock(&tvc->lock);
            }
            ObtainReadLock(&afs_xvcache);
+           uq = QPrev(tq);
            /* our tvc ptr is still good until now */
            AFS_FAST_RELE(tvc);
        }