Commit bb97131f authored Jan 06, 2026 by Thomas Fourier Committed by Jeff Johnson Jan 09, 2026

wifi: ath12k: fix dma_free_coherent() pointer



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: d8899132 ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
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/20260106084905.18622-2-fourier.thomas@gmail.com


Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

parent 9282a1e1

drivers/net/wireless/ath/ath12k/ce.c

+6 −6

Original line number	Diff line number	Diff line
		@@ -984,8 +984,8 @@ void ath12k_ce_free_pipes(struct ath12k_base *ab)
		dma_free_coherent(ab->dev,
		pipe->src_ring->nentries * desc_sz +
		CE_DESC_RING_ALIGN,
		pipe->src_ring->base_addr_owner_space,
		pipe->src_ring->base_addr_ce_space);
		pipe->src_ring->base_addr_owner_space_unaligned,
		pipe->src_ring->base_addr_ce_space_unaligned);
		kfree(pipe->src_ring);
		pipe->src_ring = NULL;
		}
		@@ -995,8 +995,8 @@ void ath12k_ce_free_pipes(struct ath12k_base *ab)
		dma_free_coherent(ab->dev,
		pipe->dest_ring->nentries * desc_sz +
		CE_DESC_RING_ALIGN,
		pipe->dest_ring->base_addr_owner_space,
		pipe->dest_ring->base_addr_ce_space);
		pipe->dest_ring->base_addr_owner_space_unaligned,
		pipe->dest_ring->base_addr_ce_space_unaligned);
		kfree(pipe->dest_ring);
		pipe->dest_ring = NULL;
		}
		@@ -1007,8 +1007,8 @@ void ath12k_ce_free_pipes(struct ath12k_base *ab)
		dma_free_coherent(ab->dev,
		pipe->status_ring->nentries * desc_sz +
		CE_DESC_RING_ALIGN,
		pipe->status_ring->base_addr_owner_space,
		pipe->status_ring->base_addr_ce_space);
		pipe->status_ring->base_addr_owner_space_unaligned,
		pipe->status_ring->base_addr_ce_space_unaligned);
		kfree(pipe->status_ring);
		pipe->status_ring = NULL;
		}