}
if (usb_endpoint_xfer_isoc(epd)) {
- /* validate packet size and number of packets */
- unsigned int maxp, packets, bytes;
-
- maxp = usb_endpoint_maxp(epd);
- maxp *= usb_endpoint_maxp_mult(epd);
- bytes = pdu->u.cmd_submit.transfer_buffer_length;
- packets = DIV_ROUND_UP(bytes, maxp);
-
+ /* validate number of packets */
if (pdu->u.cmd_submit.number_of_packets < 0 ||
- pdu->u.cmd_submit.number_of_packets > packets) {
+ pdu->u.cmd_submit.number_of_packets >
+ USBIP_MAX_ISO_PACKETS) {
dev_err(&sdev->udev->dev,
"CMD_SUBMIT: isoc invalid num packets %d\n",
pdu->u.cmd_submit.number_of_packets);
#define USBIP_DIR_OUT 0x00
#define USBIP_DIR_IN 0x01
+/*
+ * Arbitrary limit for the maximum number of isochronous packets in an URB,
+ * compare for example the uhci_submit_isochronous function in
+ * drivers/usb/host/uhci-q.c
+ */
+#define USBIP_MAX_ISO_PACKETS 1024
+
/**
* struct usbip_header_basic - data pertinent to every request
* @command: the usbip request type