[PATCH V2 RFC 1/6] usb: dwc2: core: Avoid nonsense error in gadget mode

[Stefan Wahren]

In gadget mode On bcm2835 platform the host tx fifo size could be zero.
So add zero to range and avoid such nonsense errors:

dwc2 20980000.usb: 0 invalid for host_nperio_tx_fifo_size.
dwc2 20980000.usb: Setting host_nperio_tx_fifo_size to 0
dwc2 20980000.usb: 0 invalid for host_perio_tx_fifo_size.
dwc2 20980000.usb: Setting host_perio_tx_fifo_size to 0

Signed-off-by: Stefan Wahren <stefan.wahren at i2se.com>
---
 drivers/usb/dwc2/core.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 4135a5f..5645528 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -819,7 +819,10 @@ void dwc2_set_param_host_nperio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
-	if (val < 16 || val > hsotg->hw_params.host_nperio_tx_fifo_size)
+	if (val && (val < 16))
+		valid = 0;
+
+	if (val > hsotg->hw_params.host_nperio_tx_fifo_size)
 		valid = 0;
 
 	if (!valid) {
@@ -839,7 +842,10 @@ void dwc2_set_param_host_perio_tx_fifo_size(struct dwc2_hsotg *hsotg, int val)
 {
 	int valid = 1;
 
-	if (val < 16 || val > hsotg->hw_params.host_perio_tx_fifo_size)
+	if (val && (val < 16))
+		valid = 0;
+
+	if (val > hsotg->hw_params.host_perio_tx_fifo_size)
 		valid = 0;
 
 	if (!valid) {
-- 
1.7.9.5