usb: function_rndis: align rndis_cmd_pool to request buffer size

Set reasonable range for the request buffer in case RNDIS
function is used. Align net_buf size from rndis_cmd_pool to
request buffer size since request is copied there before
it is queued.

Signed-off-by: Johann Fischer <[email protected]>

Author: jfischer-no

subsys/usb/Kconfig

@@ -74,7 +74,7 @@ config USB_DEVICE_BLUETOOTH_BIG_BUF
 
 config USB_REQUEST_BUFFER_SIZE
 	int "Set buffer size for Standard, Class and Vendor request handlers"
-	range 256 65536 if USB_DEVICE_NETWORK_RNDIS
+	range 64 512 if USB_DEVICE_NETWORK_RNDIS
 	range 8 65536
 	default 256 if USB_DEVICE_NETWORK_RNDIS
 	default 266 if (USB_DEVICE_BLUETOOTH && USB_DEVICE_BLUETOOTH_BIG_BUF)

subsys/usb/class/netusb/function_rndis.c

@@ -32,7 +32,7 @@ static struct k_fifo rndis_tx_queue;
 
 /* Serialize RNDIS command queue for later processing */
 #define CFG_RNDIS_CMD_BUF_COUNT	2
-#define CFG_RNDIS_CMD_BUF_SIZE	512
+#define CFG_RNDIS_CMD_BUF_SIZE	CONFIG_USB_REQUEST_BUFFER_SIZE
 NET_BUF_POOL_DEFINE(rndis_cmd_pool, CFG_RNDIS_CMD_BUF_COUNT,
 		    CFG_RNDIS_CMD_BUF_SIZE, 0, NULL);
 static struct k_fifo rndis_cmd_queue;