diff options
Diffstat (limited to 'recipes-kernel/linux/linux-at91-5.4.199/linux-5.4-cdc-acm-ignore-exar-devices.patch')
| -rw-r--r-- | recipes-kernel/linux/linux-at91-5.4.199/linux-5.4-cdc-acm-ignore-exar-devices.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-at91-5.4.199/linux-5.4-cdc-acm-ignore-exar-devices.patch b/recipes-kernel/linux/linux-at91-5.4.199/linux-5.4-cdc-acm-ignore-exar-devices.patch new file mode 100644 index 0000000..bda5d85 --- /dev/null +++ b/recipes-kernel/linux/linux-at91-5.4.199/linux-5.4-cdc-acm-ignore-exar-devices.patch @@ -0,0 +1,49 @@ +From 37e541cbd166fcfd7a736d25ced4938647c9a167 Mon Sep 17 00:00:00 2001 +From: Mykyta Dorokhin <mykyta.dorokhin@globallogic.com> +Date: Tue, 12 Jan 2021 23:20:37 +0200 +Subject: [PATCH] linux-5.4-cdc-acm-ignore-exar-devices + +--- + drivers/usb/class/cdc-acm.c | 18 +++++++++++++++++- + 1 file changed, 17 insertions(+), 1 deletion(-) + + Updated for 5.4.195 on 24 May 2022 by John Klug +diff -Naru orig/drivers/usb/class/cdc-acm.c new/drivers/usb/class/cdc-acm.c +--- orig/drivers/usb/class/cdc-acm.c 2022-05-24 13:14:11.796098096 -0500 ++++ new/drivers/usb/class/cdc-acm.c 2022-05-24 13:15:08.688096765 -0500 +@@ -1186,8 +1186,10 @@ + /* normal quirks */ + quirks = (unsigned long)id->driver_info; + +- if (quirks == IGNORE_DEVICE) ++ if (quirks == IGNORE_DEVICE) { ++ dev_dbg(&intf->dev, "Ignoring device\n"); + return -ENODEV; ++ } + + memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); + +@@ -1976,6 +1978,20 @@ + .driver_info = IGNORE_DEVICE, + }, + ++ /* Ignore Exar XR21V141X usb serial chips ++ * This elminates conflicting with the Exar vizzini driver. ++ * The ACM driver cannot use features in the Exar chip, ++ * such as setting the baud rate. */ ++ {USB_DEVICE(0x04e2, 0x1410), ++ .driver_info = IGNORE_DEVICE, ++ }, ++ {USB_DEVICE(0x04e2, 0x1412), ++ .driver_info = IGNORE_DEVICE, ++ }, ++ {USB_DEVICE(0x04e2, 0x1414), ++ .driver_info = IGNORE_DEVICE, ++ }, ++ + /* control interfaces without any protocol set */ + { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, + USB_CDC_PROTO_NONE) }, +-- +1.9.1 + |