[PATCH 5.17 014/772] USB: serial: pl2303: fix type detection for odd device

Greg Kroah-Hartman
2022-06-07T20:17:41Z

From: Johan Hovold <johan@kernel.org>

commit e82e7c6dde91acd6748d672a44dc1980ce239f86 upstream.

At least one pl2303 device has a bcdUSB of 1.0.1 which most likely was
was intended as 1.1.

Allow bcdDevice 1.0.1 but interpret it as 1.1.

Fixes: 1e9faef4d26d ("USB: serial: pl2303: fix HX type detection")
Cc: stable@vger.kernel.org # 5.13
Link: https://lore.kernel.org/linux-usb/CAJixRzqf4a9-ZKZDgWxicc_BpfdZVE9qqGmkiO7xEstOXUbGvQ@mail.gmail.com
Reported-by: Gary van der Merwe <gary.vandermerwe@fnb.co.za>
Link: https://lore.kernel.org/r/20220517161736.13313-1-johan@kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/pl2303.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -421,6 +421,9 @@ static int pl2303_detect_type(struct usb
bcdUSB = le16_to_cpu(desc->bcdUSB);

switch (bcdUSB) {
+ case 0x101:
+ /* USB 1.0.1? Let's assume they meant 1.1... */
+ fallthrough;
case 0x110:
switch (bcdDevice) {
case 0x300: