[PATCH v2 2/2] usb: core: Make default authorization mode configurable

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Niko Mauno <niko.mauno@xxxxxxxxxxx>

Make the default USB device authorization mode configurable at build
time. This is useful for systems that require a mode that is stricter
than the standard setting, as it avoids relying on the kernel command
line being properly set.

Signed-off-by: Niko Mauno <niko.mauno@xxxxxxxxxxx>
---
 drivers/usb/core/Kconfig | 17 +++++++++++++++++
 drivers/usb/core/hcd.c   |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 351ede4b5de2..f337aaea7604 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -116,3 +116,20 @@ config USB_AUTOSUSPEND_DELAY
 	  The default value Linux has always had is 2 seconds.  Change
 	  this value if you want a different delay and cannot modify
 	  the command line or module parameter.
+
+config USB_DEFAULT_AUTHORIZATION_MODE
+	int "Default authorization mode for USB devices"
+	range 0 2
+	default 1
+	depends on USB
+	help
+	  Select the default USB device authorization mode. Can be overridden
+	  with usbcore.authorized_default command line or module parameter.
+
+	  The available values have the following meanings:
+		0 is unauthorized for all devices
+		1 is authorized for all devices (default)
+		2 is authorized for internal devices
+
+	  If the default value is too permissive but you are unsure which mode
+	  to use, say 2.
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 9aa5e6bf9b9d..d56597dc7d42 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -357,7 +357,7 @@ static const u8 ss_rh_config_descriptor[] = {
 #define USB_AUTHORIZE_ALL	1
 #define USB_AUTHORIZE_INTERNAL	2
 
-static int authorized_default = USB_AUTHORIZE_ALL;
+static int authorized_default = CONFIG_USB_DEFAULT_AUTHORIZATION_MODE;
 module_param(authorized_default, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(authorized_default,
 		"Default USB device authorization: 0 is not authorized, 1 is authorized (default), 2 is authorized for internal devices, -1 is authorized (same as 1)");
-- 
2.39.2





[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux