nfc: pn533: Fix error code in pn533_acr122_poweron_rdr()

Set the error code if "transferred != sizeof(cmd)" instead of
returning success.

Fixes: dbafc28955fa ("NFC: pn533: don't send USB data off of the stack")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/aTfIJ9tZPmeUF4W1@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c
index ffd7367..018a806 100644 (file)
--- a/drivers/nfc/pn533/usb.c
+++ b/drivers/nfc/pn533/usb.c
@@ -406,7 +406,7 @@ static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy)
        if (rc || (transferred != sizeof(cmd))) {
                nfc_err(&phy->udev->dev,
                        "Reader power on cmd error %d\n", rc);
-               return rc;
+               return rc ?: -EINVAL;
        }
 
        rc =  usb_submit_urb(phy->in_urb, GFP_KERNEL);