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Commit 2dc2ee5c authored by Rupesh Gujare's avatar Rupesh Gujare Committed by Greg Kroah-Hartman
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staging: ozwpan: Drop oldest ISOC frame instead of dropping latest. 



In case of ISOC transfer, if TX queue is full then we start
dropping latest frame, instead we should drop oldest frame &
add latest frame to TX queue.

Signed-off-by: default avatarRupesh Gujare <rupesh.gujare@atmel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4d6c9e57

drivers/staging/ozwpan/ozpd.c

+12 −1
Original line number Diff line number Diff line
@@ -844,9 +844,20 @@ int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, const u8 *data, int len) 
			struct oz_tx_frame *isoc_unit = NULL;

			int nb = pd->nb_queued_isoc_frames;

			if (nb >= pd->isoc_latency) {

				struct list_head *e;

				struct oz_tx_frame *f;

				oz_dbg(TX_FRAMES, "Dropping ISOC Unit nb= %d\n",

				       nb);

				goto out;

				spin_lock(&pd->tx_frame_lock);

				list_for_each(e, &pd->tx_queue) {

					f = container_of(e, struct oz_tx_frame,

									link);

					if (f->skb != NULL) {

						oz_tx_isoc_free(pd, f);

						break;

					}

				}

				spin_unlock(&pd->tx_frame_lock);

			}

			isoc_unit = oz_tx_frame_alloc(pd);

			if (isoc_unit == NULL)