From: Andy Shevchenko andriy.shevchenko@linux.intel.com
[ Upstream commit fb945c95a482200876993977008b67ea658bd938 ]
While the commit 2b8bd606b1e6 ("mfd: dln2: More sanity checking for endpoints") tries to harden the sanity checks it made at the same time a regression, i.e. mixed in and out endpoints. Obviously it should have been not tested on real hardware at that time, but unluckily it didn't happen.
So, fix above mentioned typo and make device being enumerated again.
While here, introduce an enumerator for magic values to prevent similar issue to happen in the future.
Fixes: 2b8bd606b1e6 ("mfd: dln2: More sanity checking for endpoints") Cc: Oliver Neukum oneukum@suse.com Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Signed-off-by: Lee Jones lee.jones@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mfd/dln2.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/dln2.c b/drivers/mfd/dln2.c index 95d0f2df0ad42..672831d5ee32e 100644 --- a/drivers/mfd/dln2.c +++ b/drivers/mfd/dln2.c @@ -93,6 +93,11 @@ struct dln2_mod_rx_slots { spinlock_t lock; };
+enum dln2_endpoint { + DLN2_EP_OUT = 0, + DLN2_EP_IN = 1, +}; + struct dln2_dev { struct usb_device *usb_dev; struct usb_interface *interface; @@ -740,10 +745,10 @@ static int dln2_probe(struct usb_interface *interface, hostif->desc.bNumEndpoints < 2) return -ENODEV;
- epin = &hostif->endpoint[0].desc; - epout = &hostif->endpoint[1].desc; + epout = &hostif->endpoint[DLN2_EP_OUT].desc; if (!usb_endpoint_is_bulk_out(epout)) return -ENODEV; + epin = &hostif->endpoint[DLN2_EP_IN].desc; if (!usb_endpoint_is_bulk_in(epin)) return -ENODEV;