usb: dwc2: handle return code of dev_read_size() in of to, plat function
dev_read_size() returns -EINVAL (-22) if the property "g-tx-fifo-size"
does not exist. If that's the case, we now keep the default value of 0.
Signed-off-by: Wolfgang Grandegger <wg@aries-embedded.de>
diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 2748270..77988f7 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -996,8 +996,9 @@
plat->rx_fifo_sz = dev_read_u32_default(dev, "g-rx-fifo-size", 0);
plat->np_tx_fifo_sz = dev_read_u32_default(dev, "g-np-tx-fifo-size", 0);
- plat->tx_fifo_sz_nb =
- dev_read_size(dev, "g-tx-fifo-size") / sizeof(u32);
+ ret = dev_read_size(dev, "g-tx-fifo-size");
+ if (ret > 0)
+ plat->tx_fifo_sz_nb = ret / sizeof(u32);
if (plat->tx_fifo_sz_nb > DWC2_MAX_HW_ENDPOINTS)
plat->tx_fifo_sz_nb = DWC2_MAX_HW_ENDPOINTS;
if (plat->tx_fifo_sz_nb) {