Merge remote-tracking branch 'net-next/master' into mac80211-next

Resolve the merge conflict between Felix's/my and Toke's patches
coming into the tree through net and mac80211-next respectively.
Most of Felix's changes go away due to Toke's new infrastructure
work, my patch changes to "goto begin" (the label wasn't there
before) instead of returning NULL so flow control towards drivers
is preserved better.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index 65d8d714e917..0b4d79659884 100644
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -39,7 +39,7 @@
  * chooses what to send (buffer address, length). The destination
  * side keeps a supply of "anonymous receive buffers" available and
  * it handles incoming data as it arrives (when the destination
- * recieves an interrupt).
+ * receives an interrupt).
  *
  * The sender may send a simple buffer (address/length) or it may
  * send a small list of buffers.  When a small list is sent, hardware
@@ -433,6 +433,13 @@ void ath10k_ce_rx_update_write_idx(struct ath10k_ce_pipe *pipe, u32 nentries)
 	unsigned int nentries_mask = dest_ring->nentries_mask;
 	unsigned int write_index = dest_ring->write_index;
 	u32 ctrl_addr = pipe->ctrl_addr;
+	u32 cur_write_idx = ath10k_ce_dest_ring_write_index_get(ar, ctrl_addr);
+
+	/* Prevent CE ring stuck issue that will occur when ring is full.
+	 * Make sure that write index is 1 less than read index.
+	 */
+	if ((cur_write_idx + nentries)  == dest_ring->sw_index)
+		nentries -= 1;
 
 	write_index = CE_RING_IDX_ADD(nentries_mask, write_index, nentries);
 	ath10k_ce_dest_ring_write_index_set(ar, ctrl_addr, write_index);