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sniffer: only allocate USB message if queue is not too long

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When the host does not retrieved the USB messages, they keep getting
queue in the firmware, filling the RAM, and preventing further memory
to be allocated.

Change-Id: I0e447acdf757dcb5dc5c4d8b84a4235866914cad
This commit is contained in:
Kévin Redon
2018-07-08 17:34:20 +02:00
parent c6b968067d
commit b37bda0b55
1 changed files with 8 additions and 0 deletions
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8
firmware/libcommon/source/sniffer.c
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@@ -226,6 +226,14 @@ static void update_wt(uint8_t wi, uint8_t d)
*/
static struct msgb *usb_msg_alloc_hdr(uint8_t ep, uint8_t msg_class, uint8_t msg_type)
{
/* Only allocate message if not too many are already in the queue */
struct llist_head *head = usb_get_queue(SIMTRACE_USB_EP_CARD_DATAIN);
if (!head) {
return NULL;
}
if (llist_count(head) > 5) {
return NULL;
}
struct msgb *usb_msg = usb_buf_alloc(SIMTRACE_USB_EP_CARD_DATAIN);
if (!usb_msg) {
return NULL;