Merge tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc updates from Greg KH:
 "Here is the big set of char/misc driver patches for 4.17-rc1.

  There are a lot of little things in here, nothing huge, but all
  important to the different hardware types involved:

   -  thunderbolt driver updates

   -  parport updates (people still care...)

   -  nvmem driver updates

   -  mei updates (as always)

   -  hwtracing driver updates

   -  hyperv driver updates

   -  extcon driver updates

   -  ... and a handful of even smaller driver subsystem and individual
      driver updates

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (149 commits)
  hwtracing: Add HW tracing support menu
  intel_th: Add ACPI glue layer
  intel_th: Allow forcing host mode through drvdata
  intel_th: Pick up irq number from resources
  intel_th: Don't touch switch routing in host mode
  intel_th: Use correct method of finding hub
  intel_th: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate
  stm class: Make dummy's master/channel ranges configurable
  stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate
  MAINTAINERS: Bestow upon myself the care for drivers/hwtracing
  hv: add SPDX license id to Kconfig
  hv: add SPDX license to trace
  Drivers: hv: vmbus: do not mark HV_PCIE as perf_device
  Drivers: hv: vmbus: respect what we get from hv_get_synint_state()
  /dev/mem: Avoid overwriting "err" in read_mem()
  eeprom: at24: use SPDX identifier instead of GPL boiler-plate
  eeprom: at24: simplify the i2c functionality checking
  eeprom: at24: fix a line break
  eeprom: at24: tweak newlines
  eeprom: at24: refactor at24_probe()
  ...

1 files changed, 22 insertions, 12 deletions

diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c
index c5f94ca31c4d..38528ffdc0b3 100644
--- a/drivers/hwtracing/stm/dummy_stm.c
+++ b/drivers/hwtracing/stm/dummy_stm.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * A dummy STM device for stm/stm_source class testing.
  * Copyright (c) 2014, 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.
- *
  * STM class implements generic infrastructure for  System Trace Module devices
  * as defined in MIPI STPv2 specification.
  */
@@ -20,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/stm.h>
+#include <uapi/linux/stm.h>
 
 static ssize_t notrace
 dummy_stm_packet(struct stm_data *stm_data, unsigned int master,
@@ -52,6 +45,18 @@ static unsigned int fail_mode;
 
 module_param(fail_mode, int, 0600);
 
+static unsigned int master_min;
+
+module_param(master_min, int, 0400);
+
+static unsigned int master_max = STP_MASTER_MAX;
+
+module_param(master_max, int, 0400);
+
+static unsigned int nr_channels = STP_CHANNEL_MAX;
+
+module_param(nr_channels, int, 0400);
+
 static int dummy_stm_link(struct stm_data *data, unsigned int master,
 			  unsigned int channel)
 {
@@ -68,14 +73,19 @@ static int dummy_stm_init(void)
 	if (nr_dummies < 0 || nr_dummies > DUMMY_STM_MAX)
 		return -EINVAL;
 
+	if (master_min > master_max ||
+	    master_max > STP_MASTER_MAX ||
+	    nr_channels > STP_CHANNEL_MAX)
+		return -EINVAL;
+
 	for (i = 0; i < nr_dummies; i++) {
 		dummy_stm[i].name = kasprintf(GFP_KERNEL, "dummy_stm.%d", i);
 		if (!dummy_stm[i].name)
 			goto fail_unregister;
 
-		dummy_stm[i].sw_start		= 0x0000;
-		dummy_stm[i].sw_end		= 0xffff;
-		dummy_stm[i].sw_nchannels	= 0xffff;
+		dummy_stm[i].sw_start		= master_min;
+		dummy_stm[i].sw_end		= master_max;
+		dummy_stm[i].sw_nchannels	= nr_channels;
 		dummy_stm[i].packet		= dummy_stm_packet;
 		dummy_stm[i].link		= dummy_stm_link;