diff options
| author | Bjørn Mork <bjorn@mork.no> | 2017-11-15 11:35:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-24 10:35:57 +0300 |
| commit | 518ae9074514595e250898d4c48776a313649021 (patch) | |
| tree | 5d6bb626c29f66cac3012a6bcdd3ff2f9778c6f9 | |
| parent | 4590a899ee02a73ecbd484e8b45ee6760cd69867 (diff) | |
| download | linux-518ae9074514595e250898d4c48776a313649021.tar.xz | |
net: cdc_ncm: GetNtbFormat endian fix
[ Upstream commit 6314dab4b8fb8493d810e175cb340376052c69b6 ]
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: Ben Hutchings <ben.hutchings@codethink.co.uk>
Fixes: 2b02c20ce0c2 ("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: Bjørn Mork <bjorn@mork.no>
Acked-By: Enrico Mioso <mrkiko.rs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/usb/cdc_ncm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 9c80e80c5493..8d5e97251efe 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -771,7 +771,7 @@ 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) @@ -889,7 +889,7 @@ 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 |