Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 74 insertions, 16 deletions

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 8c078b808cd..59d20c599b1 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -18,6 +18,7 @@
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/delay.h>
+#include <linux/pm_runtime.h>
 
 #include <linux/mei.h>
 
@@ -415,6 +416,10 @@ void mei_host_client_init(struct work_struct *work)
 	dev->reset_count = 0;
 
 	mutex_unlock(&dev->device_lock);
+
+	pm_runtime_mark_last_busy(&dev->pdev->dev);
+	dev_dbg(&dev->pdev->dev, "rpm: autosuspend\n");
+	pm_runtime_autosuspend(&dev->pdev->dev);
 }
 
 /**
@@ -425,6 +430,12 @@ void mei_host_client_init(struct work_struct *work)
  */
 bool mei_hbuf_acquire(struct mei_device *dev)
 {
+	if (mei_pg_state(dev) == MEI_PG_ON ||
+	    dev->pg_event == MEI_PG_EVENT_WAIT) {
+		dev_dbg(&dev->pdev->dev, "device is in pg\n");
+		return false;
+	}
+
 	if (!dev->hbuf_is_ready) {
 		dev_dbg(&dev->pdev->dev, "hbuf is not ready\n");
 		return false;
@@ -460,9 +471,18 @@ int mei_cl_disconnect(struct mei_cl *cl)
 	if (cl->state != MEI_FILE_DISCONNECTING)
 		return 0;
 
+	rets = pm_runtime_get(&dev->pdev->dev);
+	if (rets < 0 && rets != -EINPROGRESS) {
+		pm_runtime_put_noidle(&dev->pdev->dev);
+		cl_err(dev, cl, "rpm: get failed %d\n", rets);
+		return rets;
+	}
+
 	cb = mei_io_cb_init(cl, NULL);
-	if (!cb)
-		return -ENOMEM;
+	if (!cb) {
+		rets = -ENOMEM;
+		goto free;
+	}
 
 	cb->fop_type = MEI_FOP_CLOSE;
 	if (mei_hbuf_acquire(dev)) {
@@ -494,8 +514,7 @@ int mei_cl_disconnect(struct mei_cl *cl)
 			cl_err(dev, cl, "wrong status client disconnect.\n");
 
 		if (err)
-			cl_dbg(dev, cl, "wait failed disconnect err=%08x\n",
-					err);
+			cl_dbg(dev, cl, "wait failed disconnect err=%d\n", err);
 
 		cl_err(dev, cl, "failed to disconnect from FW client.\n");
 	}
@@ -503,6 +522,10 @@ int mei_cl_disconnect(struct mei_cl *cl)
 	mei_io_list_flush(&dev->ctrl_rd_list, cl);
 	mei_io_list_flush(&dev->ctrl_wr_list, cl);
 free:
+	cl_dbg(dev, cl, "rpm: autosuspend\n");
+	pm_runtime_mark_last_busy(&dev->pdev->dev);
+	pm_runtime_put_autosuspend(&dev->pdev->dev);
+
 	mei_io_cb_free(cb);
 	return rets;
 }
@@ -557,6 +580,13 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
 
 	dev = cl->dev;
 
+	rets = pm_runtime_get(&dev->pdev->dev);
+	if (rets < 0 && rets != -EINPROGRESS) {
+		pm_runtime_put_noidle(&dev->pdev->dev);
+		cl_err(dev, cl, "rpm: get failed %d\n", rets);
+		return rets;
+	}
+
 	cb = mei_io_cb_init(cl, file);
 	if (!cb) {
 		rets = -ENOMEM;
@@ -567,6 +597,7 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
 
 	/* run hbuf acquire last so we don't have to undo */
 	if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) {
+		cl->state = MEI_FILE_CONNECTING;
 		if (mei_hbm_cl_connect_req(dev, cl)) {
 			rets = -ENODEV;
 			goto out;
@@ -596,6 +627,10 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file)
 	rets = cl->status;
 
 out:
+	cl_dbg(dev, cl, "rpm: autosuspend\n");
+	pm_runtime_mark_last_busy(&dev->pdev->dev);
+	pm_runtime_put_autosuspend(&dev->pdev->dev);
+
 	mei_io_cb_free(cb);
 	return rets;
 }
@@ -713,23 +748,31 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
 		return  -ENOTTY;
 	}
 
+	rets = pm_runtime_get(&dev->pdev->dev);
+	if (rets < 0 && rets != -EINPROGRESS) {
+		pm_runtime_put_noidle(&dev->pdev->dev);
+		cl_err(dev, cl, "rpm: get failed %d\n", rets);
+		return rets;
+	}
+
 	cb = mei_io_cb_init(cl, NULL);
-	if (!cb)
-		return -ENOMEM;
+	if (!cb) {
+		rets = -ENOMEM;
+		goto out;
+	}
 
 	/* always allocate at least client max message */
 	length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
 	rets = mei_io_cb_alloc_resp_buf(cb, length);
 	if (rets)
-		goto err;
+		goto out;
 
 	cb->fop_type = MEI_FOP_READ;
 	if (mei_hbuf_acquire(dev)) {
-		if (mei_hbm_cl_flow_control_req(dev, cl)) {
-			cl_err(dev, cl, "flow control send failed\n");
-			rets = -ENODEV;
-			goto err;
-		}
+		rets = mei_hbm_cl_flow_control_req(dev, cl);
+		if (rets < 0)
+			goto out;
+
 		list_add_tail(&cb->list, &dev->read_list.list);
 	} else {
 		list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
@@ -737,9 +780,14 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length)
 
 	cl->read_cb = cb;
 
-	return rets;
-err:
-	mei_io_cb_free(cb);
+out:
+	cl_dbg(dev, cl, "rpm: autosuspend\n");
+	pm_runtime_mark_last_busy(&dev->pdev->dev);
+	pm_runtime_put_autosuspend(&dev->pdev->dev);
+
+	if (rets)
+		mei_io_cb_free(cb);
+
 	return rets;
 }
 
@@ -776,7 +824,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 		return rets;
 
 	if (rets == 0) {
-		cl_dbg(dev, cl,	"No flow control credentials: not sending.\n");
+		cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
 		return 0;
 	}
 
@@ -856,6 +904,12 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
 
 	cl_dbg(dev, cl, "mei_cl_write %d\n", buf->size);
 
+	rets = pm_runtime_get(&dev->pdev->dev);
+	if (rets < 0 && rets != -EINPROGRESS) {
+		pm_runtime_put_noidle(&dev->pdev->dev);
+		cl_err(dev, cl, "rpm: get failed %d\n", rets);
+		return rets;
+	}
 
 	cb->fop_type = MEI_FOP_WRITE;
 	cb->buf_idx = 0;
@@ -926,6 +980,10 @@ out:
 
 	rets = buf->size;
 err:
+	cl_dbg(dev, cl, "rpm: autosuspend\n");
+	pm_runtime_mark_last_busy(&dev->pdev->dev);
+	pm_runtime_put_autosuspend(&dev->pdev->dev);
+
 	return rets;
 }