Commit 0ef75f51 authored by Bjørn Mork's avatar Bjørn Mork Committed by Greg Kroah-Hartman

net: cdc_ncm: GetNtbFormat endian fix

[ Upstream commit 6314dab4 ]

The GetNtbFormat and SetNtbFormat requests operate on 16 bit little
endian values. We get away with ignoring this most of the time, because
we only care about USB_CDC_NCM_NTB16_FORMAT which is 0x0000.  This
fails for USB_CDC_NCM_NTB32_FORMAT.

Fix comparison between LE value from device and constant by converting
the constant to LE.
Reported-by: default avatarBen Hutchings <ben.hutchings@codethink.co.uk>
Fixes: 2b02c20c ("cdc_ncm: Set NTB format again after altsetting switch for Huawei devices")
Cc: Enrico Mioso <mrkiko.rs@gmail.com>
Cc: Christian Panton <christian@panton.org>
Signed-off-by: default avatarBjørn Mork <bjorn@mork.no>
Acked-By: default avatarEnrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 855bf147
......@@ -772,7 +772,7 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_
int err;
u8 iface_no;
struct usb_cdc_parsed_header hdr;
u16 curr_ntb_format;
__le16 curr_ntb_format;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
......@@ -890,7 +890,7 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_
goto error2;
}
if (curr_ntb_format == USB_CDC_NCM_NTB32_FORMAT) {
if (curr_ntb_format == cpu_to_le16(USB_CDC_NCM_NTB32_FORMAT)) {
dev_info(&intf->dev, "resetting NTB format to 16-bit");
err = usbnet_write_cmd(dev, USB_CDC_SET_NTB_FORMAT,
USB_TYPE_CLASS | USB_DIR_OUT
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment