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ath10k: initialize nbytes to 0

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ath10k firmware checks nbytes == 0 as part of determining if DMA
has completed successfully.  To help make this work more often,
have the driver initialize nbytes to zero when freeing the descriptor
slot.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Ben Greear 2017-05-31 14:21:26 +03:00 committed by Kalle Valo
parent 6bb099b088
commit 4f40b42333
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/ath/ath10k/ce.c
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@ -594,6 +594,7 @@ int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
unsigned int nentries_mask = src_ring->nentries_mask;
unsigned int sw_index = src_ring->sw_index;
unsigned int read_index;
struct ce_desc *desc;
if (src_ring->hw_index == sw_index) {
/*
@ -623,6 +624,9 @@ int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
/* sanity */
src_ring->per_transfer_context[sw_index] = NULL;
desc = CE_SRC_RING_TO_DESC(src_ring->base_addr_owner_space,
sw_index);
desc->nbytes = 0;
/* Update sw_index */
sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index);