diff options
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 4d1f996..b08fcd2 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -642,7 +642,25 @@ static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, index &= 0xff; switch (requesttype & USB_RECIP_MASK) { case USB_RECIP_ENDPOINT: + if ((index & ~USB_DIR_IN) == 0) + return 0; ret = findintfep(ps->dev, index); + if (ret < 0) { + /* + * Some not fully compliant Win apps seem to get + * index wrong and have the endpoint number here + * rather than the endpoint address (with the + * correct direction). Win does let this through, + * so we'll not reject it here but leave it to + * the device to not break KVM. But we warn. + */ + ret = findintfep(ps->dev, index ^ 0x80); + if (ret >= 0) + dev_info(&ps->dev->dev, + "%s: process %i (%s) requesting ep %02x but needs %02x\n", + __func__, task_pid_nr(current), + current->comm, index, index ^ 0x80); + } if (ret >= 0) ret = checkintf(ps, ret); break; |