Make sure to reset CE configuration in the exposed
device registers. This sounds like a safe plan
since CE configurations includes DMA addresses
shared between host and the device which are made
invalid after teardown.
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/ce.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index d44d618..ba82a03 100644
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -1109,11 +1109,38 @@ out:
return ce_state;
}
+void ath10k_ce_reset_src_ring(struct ath10k *ar, int num)
+{
+ u32 ctrl_addr = ath10k_ce_base_address(num);
+
+ ath10k_ce_src_ring_base_addr_set(ar, ctrl_addr, 0);
+ ath10k_ce_src_ring_size_set(ar, ctrl_addr, 0);
+ ath10k_ce_src_ring_dmax_set(ar, ctrl_addr, 0);
+ ath10k_ce_src_ring_byte_swap_set(ar, ctrl_addr, 0);
+ ath10k_ce_src_ring_lowmark_set(ar, ctrl_addr, 0);
+ ath10k_ce_src_ring_highmark_set(ar, ctrl_addr, 0);
+
+}
+
+void ath10k_ce_reset_dest_ring(struct ath10k *ar, int num)
+{
+ u32 ctrl_addr = ath10k_ce_base_address(num);
+
+ ath10k_ce_dest_ring_base_addr_set(ar, ctrl_addr, 0);
+ ath10k_ce_dest_ring_size_set(ar, ctrl_addr, 0);
+ ath10k_ce_dest_ring_byte_swap_set(ar, ctrl_addr, 0);
+ ath10k_ce_dest_ring_lowmark_set(ar, ctrl_addr, 0);
+ ath10k_ce_dest_ring_highmark_set(ar, ctrl_addr, 0);
+}
+
void ath10k_ce_deinit(struct ath10k_ce_pipe *ce_state)
{
struct ath10k *ar = ce_state->ar;
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
+ ath10k_ce_reset_src_ring(ar, ce_state->id);
+ ath10k_ce_reset_dest_ring(ar, ce_state->id);
+
if (ce_state->src_ring) {
kfree(ce_state->src_ring->shadow_base_unaligned);
pci_free_consistent(ar_pci->pdev,
--
1.8.4.rc3
--
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