Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 4d77a6a..7310b47 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -1,18 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- *
+ * Copyright (c) 2003-2018, Intel Corporation. All rights reserved.
* Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2018, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
*/
+
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
@@ -37,6 +28,12 @@
#include "mei_dev.h"
#include "client.h"
+static struct class *mei_class;
+static dev_t mei_devt;
+#define MEI_MAX_DEVS MINORMASK
+static DEFINE_MUTEX(mei_minor_lock);
+static DEFINE_IDR(mei_idr);
+
/**
* mei_open - the open function
*
@@ -599,10 +596,10 @@
mei_cl_read_start(cl, mei_cl_mtu(cl), file);
}
- if (req_events & (POLLOUT | POLLWRNORM)) {
+ if (req_events & (EPOLLOUT | EPOLLWRNORM)) {
poll_wait(file, &cl->tx_wait, wait);
if (cl->tx_cb_queued < dev->tx_queue_limit)
- mask |= POLLOUT | POLLWRNORM;
+ mask |= EPOLLOUT | EPOLLWRNORM;
}
out:
@@ -838,12 +835,58 @@
}
static DEVICE_ATTR_RO(fw_ver);
+/**
+ * dev_state_show - display device state
+ *
+ * @device: device pointer
+ * @attr: attribute pointer
+ * @buf: char out buffer
+ *
+ * Return: number of the bytes printed into buf or error
+ */
+static ssize_t dev_state_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ struct mei_device *dev = dev_get_drvdata(device);
+ enum mei_dev_state dev_state;
+
+ mutex_lock(&dev->device_lock);
+ dev_state = dev->dev_state;
+ mutex_unlock(&dev->device_lock);
+
+ return sprintf(buf, "%s", mei_dev_state_str(dev_state));
+}
+static DEVICE_ATTR_RO(dev_state);
+
+/**
+ * dev_set_devstate: set to new device state and notify sysfs file.
+ *
+ * @dev: mei_device
+ * @state: new device state
+ */
+void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state)
+{
+ struct device *clsdev;
+
+ if (dev->dev_state == state)
+ return;
+
+ dev->dev_state = state;
+
+ clsdev = class_find_device_by_devt(mei_class, dev->cdev.dev);
+ if (clsdev) {
+ sysfs_notify(&clsdev->kobj, NULL, "dev_state");
+ put_device(clsdev);
+ }
+}
+
static struct attribute *mei_attrs[] = {
&dev_attr_fw_status.attr,
&dev_attr_hbm_ver.attr,
&dev_attr_hbm_ver_drv.attr,
&dev_attr_tx_queue_limit.attr,
&dev_attr_fw_ver.attr,
+ &dev_attr_dev_state.attr,
NULL
};
ATTRIBUTE_GROUPS(mei);
@@ -867,12 +910,6 @@
.llseek = no_llseek
};
-static struct class *mei_class;
-static dev_t mei_devt;
-#define MEI_MAX_DEVS MINORMASK
-static DEFINE_MUTEX(mei_minor_lock);
-static DEFINE_IDR(mei_idr);
-
/**
* mei_minor_get - obtain next free device minor number
*
@@ -940,16 +977,10 @@
goto err_dev_create;
}
- ret = mei_dbgfs_register(dev, dev_name(clsdev));
- if (ret) {
- dev_err(clsdev, "cannot register debugfs ret = %d\n", ret);
- goto err_dev_dbgfs;
- }
+ mei_dbgfs_register(dev, dev_name(clsdev));
return 0;
-err_dev_dbgfs:
- device_destroy(mei_class, devno);
err_dev_create:
cdev_del(&dev->cdev);
err_dev_add: