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Some 9pfs bugs fixes: potential hang at reset, migration blocker leak.

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Merge remote-tracking branch 'remotes/gkurz/tags/for-upstream' into staging

Some 9pfs bugs fixes: potential hang at reset, migration blocker leak.

# gpg: Signature made Tue 04 Apr 2017 17:07:55 BST
# gpg:                using DSA key 0x02FC3AEB0101DBC2
# gpg: Good signature from "Greg Kurz <groug@kaod.org>"
# gpg:                 aka "Greg Kurz <groug@free.fr>"
# gpg:                 aka "Greg Kurz <gkurz@linux.vnet.ibm.com>"
# gpg:                 aka "Gregory Kurz (Groug) <groug@free.fr>"
# gpg:                 aka "[jpeg image of size 3330]"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2BD4 3B44 535E C0A7 9894  DBA2 02FC 3AEB 0101 DBC2

* remotes/gkurz/tags/for-upstream:
  9pfs: clear migration blocker at session reset
  9pfs: fix multiple flush for same request

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-04-04 18:00:23 +01:00
commit 1413c663c9
1 changed files with 11 additions and 8 deletions
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19
hw/9pfs/9p.c
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@ -539,14 +539,15 @@ static void coroutine_fn virtfs_reset(V9fsPDU *pdu)
/* Free all fids */
while (s->fid_list) {
/* Get fid */
fidp = s->fid_list;
s->fid_list = fidp->next;
fidp->ref++;
if (fidp->ref) {
fidp->clunked = 1;
} else {
free_fid(pdu, fidp);
}
/* Clunk fid */
s->fid_list = fidp->next;
fidp->clunked = 1;
put_fid(pdu, fidp);
}
}
@ -2387,8 +2388,10 @@ static void coroutine_fn v9fs_flush(void *opaque)
* Wait for pdu to complete.
*/
qemu_co_queue_wait(&cancel_pdu->complete, NULL);
cancel_pdu->cancelled = 0;
pdu_free(cancel_pdu);
if (!qemu_co_queue_next(&cancel_pdu->complete)) {
cancel_pdu->cancelled = 0;
pdu_free(cancel_pdu);
}
}
pdu_complete(pdu, 7);
}