Merge branch 'x86/amd-nb' into x86/apic-cleanups

Reason: apic cleanup series depends on x86/apic, x86/amd-nb x86/platform

Conflicts:
	arch/x86/include/asm/io_apic.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 224 insertions, 92 deletions

diff --git a/net/9p/client.c b/net/9p/client.c
index 9eb72505308f..a848bca9fbff 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -61,13 +61,13 @@ static const match_table_t tokens = {
 
 inline int p9_is_proto_dotl(struct p9_client *clnt)
 {
-        return (clnt->proto_version == p9_proto_2000L);
+        return clnt->proto_version == p9_proto_2000L;
 }
 EXPORT_SYMBOL(p9_is_proto_dotl);
 
 inline int p9_is_proto_dotu(struct p9_client *clnt)
 {
-        return (clnt->proto_version == p9_proto_2000u);
+        return clnt->proto_version == p9_proto_2000u;
 }
 EXPORT_SYMBOL(p9_is_proto_dotu);
 
@@ -450,32 +450,43 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
                 return err;
         }
 
-        if (type == P9_RERROR) {
+        if (type == P9_RERROR || type == P9_RLERROR) {
                 int ecode;
-                char *ename;
 
-                err = p9pdu_readf(req->rc, c->proto_version, "s?d",
-                                                        &ename, &ecode);
-                if (err) {
-                        P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n",
-                                                                        err);
-                        return err;
-                }
+                if (!p9_is_proto_dotl(c)) {
+                        char *ename;
 
-                if (p9_is_proto_dotu(c) ||
-                        p9_is_proto_dotl(c))
-                        err = -ecode;
+                        err = p9pdu_readf(req->rc, c->proto_version, "s?d",
+                                                                &ename, &ecode);
+                        if (err)
+                                goto out_err;
+
+                        if (p9_is_proto_dotu(c))
+                                err = -ecode;
 
-                if (!err || !IS_ERR_VALUE(err))
-                        err = p9_errstr2errno(ename, strlen(ename));
+                        if (!err || !IS_ERR_VALUE(err)) {
+                                err = p9_errstr2errno(ename, strlen(ename));
+
+                                P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
+
+                                kfree(ename);
+                        }
+                } else {
+                        err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode);
+                        err = -ecode;
 
-                P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename);
+                        P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode);
+                }
 
-                kfree(ename);
         } else
                 err = 0;
 
         return err;
+
+out_err:
+        P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err);
+
+        return err;
 }
 
 /**
@@ -568,11 +579,14 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
         va_start(ap, fmt);
         err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap);
         va_end(ap);
+        if (err)
+                goto reterr;
         p9pdu_finalize(req->tc);
 
         err = c->trans_mod->request(c, req);
         if (err < 0) {
-                c->status = Disconnected;
+                if (err != -ERESTARTSYS)
+                        c->status = Disconnected;
                 goto reterr;
         }
 
@@ -671,7 +685,7 @@ static void p9_fid_destroy(struct p9_fid *fid)
         kfree(fid);
 }
 
-int p9_client_version(struct p9_client *c)
+static int p9_client_version(struct p9_client *c)
 {
         int err = 0;
         struct p9_req_t *req;
@@ -730,7 +744,6 @@ error:
 
         return err;
 }
-EXPORT_SYMBOL(p9_client_version);
 
 struct p9_client *p9_client_create(const char *dev_name, char *options)
 {
@@ -887,54 +900,6 @@ error:
 }
 EXPORT_SYMBOL(p9_client_attach);
 
-struct p9_fid *
-p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname)
-{
-        int err;
-        struct p9_req_t *req;
-        struct p9_qid qid;
-        struct p9_fid *afid;
-
-        P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname);
-        err = 0;
-
-        afid = p9_fid_create(clnt);
-        if (IS_ERR(afid)) {
-                err = PTR_ERR(afid);
-                afid = NULL;
-                goto error;
-        }
-
-        req = p9_client_rpc(clnt, P9_TAUTH, "dss?d",
-                        afid ? afid->fid : P9_NOFID, uname, aname, n_uname);
-        if (IS_ERR(req)) {
-                err = PTR_ERR(req);
-                goto error;
-        }
-
-        err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
-        if (err) {
-                p9pdu_dump(1, req->rc);
-                p9_free_req(clnt, req);
-                goto error;
-        }
-
-        P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n",
-                                        qid.type,
-                                        (unsigned long long)qid.path,
-                                        qid.version);
-
-        memmove(&afid->qid, &qid, sizeof(struct p9_qid));
-        p9_free_req(clnt, req);
-        return afid;
-
-error:
-        if (afid)
-                p9_fid_destroy(afid);
-        return ERR_PTR(err);
-}
-EXPORT_SYMBOL(p9_client_auth);
-
 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
         int clone)
 {
@@ -1200,12 +1165,44 @@ int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
 }
 EXPORT_SYMBOL(p9_client_link);
 
+int p9_client_fsync(struct p9_fid *fid, int datasync)
+{
+        int err;
+        struct p9_client *clnt;
+        struct p9_req_t *req;
+
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d datasync:%d\n",
+                        fid->fid, datasync);
+        err = 0;
+        clnt = fid->clnt;
+
+        req = p9_client_rpc(clnt, P9_TFSYNC, "dd", fid->fid, datasync);
+        if (IS_ERR(req)) {
+                err = PTR_ERR(req);
+                goto error;
+        }
+
+        P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid);
+
+        p9_free_req(clnt, req);
+
+error:
+        return err;
+}
+EXPORT_SYMBOL(p9_client_fsync);
+
 int p9_client_clunk(struct p9_fid *fid)
 {
         int err;
         struct p9_client *clnt;
         struct p9_req_t *req;
 
+        if (!fid) {
+                P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n");
+                dump_stack();
+                return 0;
+        }
+
         P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid);
         err = 0;
         clnt = fid->clnt;
@@ -1289,16 +1286,13 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
 
         if (data) {
                 memmove(data, dataptr, count);
-        }
-
-        if (udata) {
+        } else {
                 err = copy_to_user(udata, dataptr, count);
                 if (err) {
                         err = -EFAULT;
                         goto free_and_error;
                 }
         }
-
         p9_free_req(clnt, req);
         return count;
 
@@ -1810,3 +1804,96 @@ error:
 
 }
 EXPORT_SYMBOL(p9_client_mkdir_dotl);
+
+int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status)
+{
+        int err;
+        struct p9_client *clnt;
+        struct p9_req_t *req;
+
+        err = 0;
+        clnt = fid->clnt;
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d "
+                        "start %lld length %lld proc_id %d client_id %s\n",
+                        fid->fid, flock->type, flock->flags, flock->start,
+                        flock->length, flock->proc_id, flock->client_id);
+
+        req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type,
+                                flock->flags, flock->start, flock->length,
+                                        flock->proc_id, flock->client_id);
+
+        if (IS_ERR(req))
+                return PTR_ERR(req);
+
+        err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);
+        if (err) {
+                p9pdu_dump(1, req->rc);
+                goto error;
+        }
+        P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status);
+error:
+        p9_free_req(clnt, req);
+        return err;
+
+}
+EXPORT_SYMBOL(p9_client_lock_dotl);
+
+int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock)
+{
+        int err;
+        struct p9_client *clnt;
+        struct p9_req_t *req;
+
+        err = 0;
+        clnt = fid->clnt;
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld "
+                "length %lld proc_id %d client_id %s\n", fid->fid, glock->type,
+                glock->start, glock->length, glock->proc_id, glock->client_id);
+
+        req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid,  glock->type,
+                glock->start, glock->length, glock->proc_id, glock->client_id);
+
+        if (IS_ERR(req))
+                return PTR_ERR(req);
+
+        err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type,
+                        &glock->start, &glock->length, &glock->proc_id,
+                        &glock->client_id);
+        if (err) {
+                p9pdu_dump(1, req->rc);
+                goto error;
+        }
+        P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld "
+                "proc_id %d client_id %s\n", glock->type, glock->start,
+                glock->length, glock->proc_id, glock->client_id);
+error:
+        p9_free_req(clnt, req);
+        return err;
+}
+EXPORT_SYMBOL(p9_client_getlock_dotl);
+
+int p9_client_readlink(struct p9_fid *fid, char **target)
+{
+        int err;
+        struct p9_client *clnt;
+        struct p9_req_t *req;
+
+        err = 0;
+        clnt = fid->clnt;
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid);
+
+        req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid);
+        if (IS_ERR(req))
+                return PTR_ERR(req);
+
+        err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
+        if (err) {
+                p9pdu_dump(1, req->rc);
+                goto error;
+        }
+        P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);
+error:
+        p9_free_req(clnt, req);
+        return err;
+}
+EXPORT_SYMBOL(p9_client_readlink);
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 3acd3afb20c8..45c15f491401 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -122,9 +122,8 @@ static size_t
 pdu_write_u(struct p9_fcall *pdu, const char __user *udata, size_t size)
 {
         size_t len = MIN(pdu->capacity - pdu->size, size);
-        int err = copy_from_user(&pdu->sdata[pdu->size], udata, len);
-        if (err)
-                printk(KERN_WARNING "pdu_write_u returning: %d\n", err);
+        if (copy_from_user(&pdu->sdata[pdu->size], udata, len))
+                len = 0;
 
         pdu->size += len;
         return size - len;
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index c85109d809ca..078eb162d9bf 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -222,7 +222,7 @@ static void p9_conn_cancel(struct p9_conn *m, int err)
         }
 }
 
-static unsigned int
+static int
 p9_fd_poll(struct p9_client *client, struct poll_table_struct *pt)
 {
         int ret, n;
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index b88515936e4b..c8f3f72ab20e 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -75,6 +75,8 @@ struct virtio_chan {
         struct p9_client *client;
         struct virtio_device *vdev;
         struct virtqueue *vq;
+        int ring_bufs_avail;
+        wait_queue_head_t *vc_wq;
 
         /* Scatterlist: can be too big for stack. */
         struct scatterlist sg[VIRTQUEUE_NUM];
@@ -134,16 +136,30 @@ static void req_done(struct virtqueue *vq)
         struct p9_fcall *rc;
         unsigned int len;
         struct p9_req_t *req;
+        unsigned long flags;
 
         P9_DPRINTK(P9_DEBUG_TRANS, ": request done\n");
 
-        while ((rc = virtqueue_get_buf(chan->vq, &len)) != NULL) {
-                P9_DPRINTK(P9_DEBUG_TRANS, ": rc %p\n", rc);
-                P9_DPRINTK(P9_DEBUG_TRANS, ": lookup tag %d\n", rc->tag);
-                req = p9_tag_lookup(chan->client, rc->tag);
-                req->status = REQ_STATUS_RCVD;
-                p9_client_cb(chan->client, req);
-        }
+        do {
+                spin_lock_irqsave(&chan->lock, flags);
+                rc = virtqueue_get_buf(chan->vq, &len);
+
+                if (rc != NULL) {
+                        if (!chan->ring_bufs_avail) {
+                                chan->ring_bufs_avail = 1;
+                                wake_up(chan->vc_wq);
+                        }
+                        spin_unlock_irqrestore(&chan->lock, flags);
+                        P9_DPRINTK(P9_DEBUG_TRANS, ": rc %p\n", rc);
+                        P9_DPRINTK(P9_DEBUG_TRANS, ": lookup tag %d\n",
+                                        rc->tag);
+                        req = p9_tag_lookup(chan->client, rc->tag);
+                        req->status = REQ_STATUS_RCVD;
+                        p9_client_cb(chan->client, req);
+                } else {
+                        spin_unlock_irqrestore(&chan->lock, flags);
+                }
+        } while (rc != NULL);
 }
 
 /**
@@ -199,23 +215,43 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
         int in, out;
         struct virtio_chan *chan = client->trans;
         char *rdata = (char *)req->rc+sizeof(struct p9_fcall);
+        unsigned long flags;
+        int err;
 
         P9_DPRINTK(P9_DEBUG_TRANS, "9p debug: virtio request\n");
 
+req_retry:
+        req->status = REQ_STATUS_SENT;
+
+        spin_lock_irqsave(&chan->lock, flags);
         out = pack_sg_list(chan->sg, 0, VIRTQUEUE_NUM, req->tc->sdata,
                                                                 req->tc->size);
         in = pack_sg_list(chan->sg, out, VIRTQUEUE_NUM-out, rdata,
                                                                 client->msize);
 
-        req->status = REQ_STATUS_SENT;
-
-        if (virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc) < 0) {
-                P9_DPRINTK(P9_DEBUG_TRANS,
-                        "9p debug: virtio rpc add_buf returned failure");
-                return -EIO;
+        err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);
+        if (err < 0) {
+                if (err == -ENOSPC) {
+                        chan->ring_bufs_avail = 0;
+                        spin_unlock_irqrestore(&chan->lock, flags);
+                        err = wait_event_interruptible(*chan->vc_wq,
+                                                        chan->ring_bufs_avail);
+                        if (err  == -ERESTARTSYS)
+                                return err;
+
+                        P9_DPRINTK(P9_DEBUG_TRANS, "9p:Retry virtio request\n");
+                        goto req_retry;
+                } else {
+                        spin_unlock_irqrestore(&chan->lock, flags);
+                        P9_DPRINTK(P9_DEBUG_TRANS,
+                                        "9p debug: "
+                                        "virtio rpc add_buf returned failure");
+                        return -EIO;
+                }
         }
 
         virtqueue_kick(chan->vq);
+        spin_unlock_irqrestore(&chan->lock, flags);
 
         P9_DPRINTK(P9_DEBUG_TRANS, "9p debug: virtio request kicked\n");
         return 0;
@@ -290,14 +326,23 @@ static int p9_virtio_probe(struct virtio_device *vdev)
         chan->tag_len = tag_len;
         err = sysfs_create_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
         if (err) {
-                kfree(tag);
-                goto out_free_vq;
+                goto out_free_tag;
         }
+        chan->vc_wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
+        if (!chan->vc_wq) {
+                err = -ENOMEM;
+                goto out_free_tag;
+        }
+        init_waitqueue_head(chan->vc_wq);
+        chan->ring_bufs_avail = 1;
+
         mutex_lock(&virtio_9p_lock);
         list_add_tail(&chan->chan_list, &virtio_chan_list);
         mutex_unlock(&virtio_9p_lock);
         return 0;
 
+out_free_tag:
+        kfree(tag);
 out_free_vq:
         vdev->config->del_vqs(vdev);
         kfree(chan);
@@ -371,6 +416,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
         mutex_unlock(&virtio_9p_lock);
         sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
         kfree(chan->tag);
+        kfree(chan->vc_wq);
         kfree(chan);
 
 }