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[v4,3/3] usb: cdc-acm: Ignore Exar XR21V141X when serial driver is built

Message ID 20200607160809.20192-4-mani@kernel.org
State New
Headers show
Series [v4,1/3] usb: serial: Add MaxLinear/Exar USB to Serial driver | expand

Commit Message

Manivannan Sadhasivam June 7, 2020, 4:08 p.m. UTC
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

The RTS/CTS line discipline for this device doesn't follow
the standard. So, in order to properly support TX, a separate
driver is needed.

Ensure that cdc_acm will ignore it during probe time, if the
Kernel is built with support for it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
 drivers/usb/class/cdc-acm.c | 6 ++++++
 1 file changed, 6 insertions(+)
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diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 84d6f7df09a4..30e20d06d044 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1864,6 +1864,12 @@  static const struct usb_device_id acm_ids[] = {
+	{ USB_DEVICE(0x04e2, 0x1410),   /* Ignore XR21V141X USB to Serial converter */
+	.driver_info = IGNORE_DEVICE,
+	},
 	/*Samsung phone in firmware update mode */
 	{ USB_DEVICE(0x04e8, 0x685d),
 	.driver_info = IGNORE_DEVICE,