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-rw-r--r--net/9p/client.c70
1 files changed, 43 insertions, 27 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 01f1779eba80..8b93cae2d11d 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -204,6 +204,17 @@ free_and_return:
return ret;
}
+struct p9_fcall *p9_fcall_alloc(int alloc_msize)
+{
+ struct p9_fcall *fc;
+ fc = kmalloc(sizeof(struct p9_fcall) + alloc_msize, GFP_NOFS);
+ if (!fc)
+ return NULL;
+ fc->capacity = alloc_msize;
+ fc->sdata = (char *) fc + sizeof(struct p9_fcall);
+ return fc;
+}
+
/**
* p9_tag_alloc - lookup/allocate a request by tag
* @c: client session to lookup tag within
@@ -256,39 +267,36 @@ p9_tag_alloc(struct p9_client *c, u16 tag, unsigned int max_size)
col = tag % P9_ROW_MAXTAG;
req = &c->reqs[row][col];
- if (!req->tc) {
+ if (!req->wq) {
req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_NOFS);
- if (!req->wq) {
- pr_err("Couldn't grow tag array\n");
- return ERR_PTR(-ENOMEM);
- }
+ if (!req->wq)
+ goto grow_failed;
init_waitqueue_head(req->wq);
- req->tc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
- GFP_NOFS);
- req->rc = kmalloc(sizeof(struct p9_fcall) + alloc_msize,
- GFP_NOFS);
- if ((!req->tc) || (!req->rc)) {
- pr_err("Couldn't grow tag array\n");
- kfree(req->tc);
- kfree(req->rc);
- kfree(req->wq);
- req->tc = req->rc = NULL;
- req->wq = NULL;
- return ERR_PTR(-ENOMEM);
- }
- req->tc->capacity = alloc_msize;
- req->rc->capacity = alloc_msize;
- req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall);
- req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall);
}
+ if (!req->tc)
+ req->tc = p9_fcall_alloc(alloc_msize);
+ if (!req->rc)
+ req->rc = p9_fcall_alloc(alloc_msize);
+ if (!req->tc || !req->rc)
+ goto grow_failed;
+
p9pdu_reset(req->tc);
p9pdu_reset(req->rc);
req->tc->tag = tag-1;
req->status = REQ_STATUS_ALLOC;
- return &c->reqs[row][col];
+ return req;
+
+grow_failed:
+ pr_err("Couldn't grow tag array\n");
+ kfree(req->tc);
+ kfree(req->rc);
+ kfree(req->wq);
+ req->tc = req->rc = NULL;
+ req->wq = NULL;
+ return ERR_PTR(-ENOMEM);
}
/**
@@ -648,12 +656,20 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
return PTR_ERR(req);
- /* if we haven't received a response for oldreq,
- remove it from the list. */
+ /*
+ * if we haven't received a response for oldreq,
+ * remove it from the list, and notify the transport
+ * layer that the reply will never arrive.
+ */
spin_lock(&c->lock);
- if (oldreq->status == REQ_STATUS_FLSH)
+ if (oldreq->status == REQ_STATUS_FLSH) {
list_del(&oldreq->req_list);
- spin_unlock(&c->lock);
+ spin_unlock(&c->lock);
+ if (c->trans_mod->cancelled)
+ c->trans_mod->cancelled(c, req);
+ } else {
+ spin_unlock(&c->lock);
+ }
p9_free_req(c, req);
return 0;

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