[PATCH 6.12 117/169] wifi: ath10k: fix dma_free_coherent() pointer

Greg Kroah-Hartman
2026-01-28T15:48:42Z

From: Thomas Fourier <fourier.thomas@gmail.com>

commit 9282a1e171ad8d2205067e8ec3bbe4e3cef4f29f upstream.

dma_alloc_coherent() allocates a DMA mapped buffer and stores the
addresses in XXX_unaligned fields. Those should be reused when freeing
the buffer rather than the aligned addresses.

Fixes: 2a1e1ad3fd37 ("ath10k: Add support for 64 bit ce descriptor")
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20260105210439.20131-2-fourier.thomas@gmail.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/ath/ath10k/ce.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -1727,8 +1727,8 @@ static void _ath10k_ce_free_pipe(struct
(ce_state->src_ring->nentries *
sizeof(struct ce_desc) +
CE_DESC_RING_ALIGN),
- ce_state->src_ring->base_addr_owner_space,
- ce_state->src_ring->base_addr_ce_space);
+ ce_state->src_ring->base_addr_owner_space_unaligned,
+ ce_state->src_ring->base_addr_ce_space_unaligned);
kfree(ce_state->src_ring);
}

@@ -1737,8 +1737,8 @@ static void _ath10k_ce_free_pipe(struct
(ce_state->dest_ring->nentries *
sizeof(struct ce_desc) +
CE_DESC_RING_ALIGN),
- ce_state->dest_ring->base_addr_owner_space,
- ce_state->dest_ring->base_addr_ce_space);
+ ce_state->dest_ring->base_addr_owner_space_unaligned,
+ ce_state->dest_ring->base_addr_ce_space_unaligned);
kfree(ce_state->dest_ring);
}

@@ -1758,8 +1758,8 @@ static void _ath10k_ce_free_pipe_64(stru
(ce_state->src_ring->nentries *
sizeof(struct ce_desc_64) +
CE_DESC_RING_ALIGN),
- ce_state->src_ring->base_addr_owner_space,
- ce_state->src_ring->base_addr_ce_space);
+ ce_state->src_ring->base_addr_owner_space_unaligned,
+ ce_state->src_ring->base_addr_ce_space_unaligned);
kfree(ce_state->src_ring);
}

@@ -1768,8 +1768,8 @@ static void _ath10k_ce_free_pipe_64(stru
(ce_state->dest_ring->nentries *
sizeof(struct ce_desc_64) +
CE_DESC_RING_ALIGN),
- ce_state->dest_ring->base_addr_owner_space,
- ce_state->dest_ring->base_addr_ce_space);
+ ce_state->dest_ring->base_addr_owner_space_unaligned,
+ ce_state->dest_ring->base_addr_ce_space_unaligned);
kfree(ce_state->dest_ring);
}