diff options
Diffstat (limited to '0001-USB-move-usb-debugfs-directory-creation-to-the-usb-c.patch')
| -rw-r--r-- | 0001-USB-move-usb-debugfs-directory-creation-to-the-usb-c.patch | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/0001-USB-move-usb-debugfs-directory-creation-to-the-usb-c.patch b/0001-USB-move-usb-debugfs-directory-creation-to-the-usb-c.patch new file mode 100644 index 00000000000000..4cb09f67b68bdd --- /dev/null +++ b/0001-USB-move-usb-debugfs-directory-creation-to-the-usb-c.patch @@ -0,0 +1,159 @@ +From 34fef47efd28235e5dcee8cfba449ea98b86dfed Mon Sep 17 00:00:00 2001 +From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +Date: Tue, 4 Jun 2019 16:07:40 +0200 +Subject: [PATCH] USB: move usb debugfs directory creation to the usb common + core + +The USB gadget subsystem wants to use the USB debugfs root directory, so +move it to the common "core" USB code so that it is properly initialized +and removed as needed. + +In order to properly do this, we need to load the common code before the +usb core code, when everything is linked into the kernel, so reorder the +link order of the code. + +Also as the usb common code has the possibility of the led trigger logic +to be merged into it, handle the build option properly by only having +one module init/exit function and have the common code initialize the +led trigger if needed. + +Reported-by: Chunfeng Yun <chunfeng.yun@mediatek.com> +Cc: Felipe Balbi <felipe.balbi@linux.intel.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/usb/Makefile | 3 +-- + drivers/usb/common/common.c | 21 +++++++++++++++++++++ + drivers/usb/common/common.h | 14 ++++++++++++++ + drivers/usb/common/led.c | 9 +++------ + drivers/usb/core/usb.c | 10 ++++------ + 5 files changed, 43 insertions(+), 14 deletions(-) + create mode 100644 drivers/usb/common/common.h + +--- a/drivers/usb/Makefile ++++ b/drivers/usb/Makefile +@@ -5,6 +5,7 @@ + + # Object files in subdirectories + ++obj-$(CONFIG_USB_COMMON) += common/ + obj-$(CONFIG_USB) += core/ + obj-$(CONFIG_USB_SUPPORT) += phy/ + +@@ -60,8 +61,6 @@ obj-$(CONFIG_USB_CHIPIDEA) += chipidea/ + obj-$(CONFIG_USB_RENESAS_USBHS) += renesas_usbhs/ + obj-$(CONFIG_USB_GADGET) += gadget/ + +-obj-$(CONFIG_USB_COMMON) += common/ +- + obj-$(CONFIG_USBIP_CORE) += usbip/ + + obj-$(CONFIG_TYPEC) += typec/ +--- a/drivers/usb/common/common.c ++++ b/drivers/usb/common/common.c +@@ -15,6 +15,8 @@ + #include <linux/usb/of.h> + #include <linux/usb/otg.h> + #include <linux/of_platform.h> ++#include <linux/debugfs.h> ++#include "common.h" + + static const char *const ep_type_names[] = { + [USB_ENDPOINT_XFER_CONTROL] = "ctrl", +@@ -291,4 +293,23 @@ struct device *usb_of_get_companion_dev( + EXPORT_SYMBOL_GPL(usb_of_get_companion_dev); + #endif + ++struct dentry *usb_debug_root; ++EXPORT_SYMBOL_GPL(usb_debug_root); ++ ++static int __init usb_common_init(void) ++{ ++ usb_debug_root = debugfs_create_dir("usb", NULL); ++ ledtrig_usb_init(); ++ return 0; ++} ++ ++static void __exit usb_common_exit(void) ++{ ++ ledtrig_usb_exit(); ++ debugfs_remove_recursive(usb_debug_root); ++} ++ ++subsys_initcall(usb_common_init); ++module_exit(usb_common_exit); ++ + MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/drivers/usb/common/common.h +@@ -0,0 +1,14 @@ ++/* SPDX-License-Identifier: GPL-2.0 */ ++ ++#ifndef __LINUX_USB_COMMON_H ++#define __LINUX_USB_COMMON_H ++ ++#if defined(CONFIG_USB_LED_TRIG) ++void ledtrig_usb_init(void); ++void ledtrig_usb_exit(void); ++#else ++static inline void ledtrig_usb_init(void) { } ++static inline void ledtrig_usb_exit(void) { } ++#endif ++ ++#endif /* __LINUX_USB_COMMON_H */ +--- a/drivers/usb/common/led.c ++++ b/drivers/usb/common/led.c +@@ -10,6 +10,7 @@ + #include <linux/init.h> + #include <linux/leds.h> + #include <linux/usb.h> ++#include "common.h" + + #define BLINK_DELAY 30 + +@@ -36,18 +37,14 @@ void usb_led_activity(enum usb_led_event + EXPORT_SYMBOL_GPL(usb_led_activity); + + +-static int __init ledtrig_usb_init(void) ++void __init ledtrig_usb_init(void) + { + led_trigger_register_simple("usb-gadget", &ledtrig_usb_gadget); + led_trigger_register_simple("usb-host", &ledtrig_usb_host); +- return 0; + } + +-static void __exit ledtrig_usb_exit(void) ++void __exit ledtrig_usb_exit(void) + { + led_trigger_unregister_simple(ledtrig_usb_gadget); + led_trigger_unregister_simple(ledtrig_usb_host); + } +- +-module_init(ledtrig_usb_init); +-module_exit(ledtrig_usb_exit); +--- a/drivers/usb/core/usb.c ++++ b/drivers/usb/core/usb.c +@@ -1185,19 +1185,17 @@ static struct notifier_block usb_bus_nb + .notifier_call = usb_bus_notify, + }; + +-struct dentry *usb_debug_root; +-EXPORT_SYMBOL_GPL(usb_debug_root); ++static struct dentry *usb_devices_root; + + static void usb_debugfs_init(void) + { +- usb_debug_root = debugfs_create_dir("usb", NULL); +- debugfs_create_file("devices", 0444, usb_debug_root, NULL, +- &usbfs_devices_fops); ++ usb_devices_root = debugfs_create_file("devices", 0444, usb_debug_root, ++ NULL, &usbfs_devices_fops); + } + + static void usb_debugfs_cleanup(void) + { +- debugfs_remove_recursive(usb_debug_root); ++ debugfs_remove(usb_devices_root); + } + + /* |