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olimex: fix usbtr_recv. 

Partial sends need to skip the sent portion of the buffer before
retrying.
This commit is contained in:
Daniel Beer 2012-02-29 16:08:26 +13:00
parent bdce08a84a
commit 25da331e21
1 changed files with 5 additions and 5 deletions
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10
drivers/olimex.c
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@ -203,20 +203,20 @@ static int open_device(struct olimex_transport *tr, struct usb_device *dev)
static int usbtr_send(transport_t tr_base, const uint8_t *data, int len)
{
struct olimex_transport *tr = (struct olimex_transport *)tr_base;
int sent;
while (len) {
#ifdef DEBUG_OLIMEX
debug_hexdump(__FILE__": USB transfer out", data, len);
debug_hexdump(__FILE__ ": USB transfer out", data, len);
#endif
while (len) {
sent = usb_bulk_write(tr->handle, tr->out_ep,
(char *)data, len, TIMEOUT);
if (sent < 0) {
if (sent <= 0) {
pr_error(__FILE__": can't send data");
return -1;
}
data += sent;
len -= sent;
}
@ -239,7 +239,7 @@ static int usbtr_recv(transport_t tr_base, uint8_t *databuf, int max_len)
printc(__FILE__": %s : read %d\n", __FUNCTION__, rlen);
#endif
if (rlen < 0) {
if (rlen <= 0) {
pr_error(__FILE__": can't receive data");
return -1;
}