[PATCH 5.15 528/570] wifi: brcmsmac: Fix dma_free_coherent() size

Greg Kroah-Hartman
2026-04-13T16:40:47Z

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

commit 12cd7632757a54ce586e36040210b1a738a0fc53 upstream.

dma_alloc_consistent() may change the size to align it. The new size is
saved in alloced.

Change the free size to match the allocation size.

Fixes: 5b435de0d786 ("net: wireless: add brcm80211 drivers")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20260218130741.46566-3-fourier.thomas@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmsmac/dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/dma.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/dma.c
@@ -483,7 +483,7 @@ static void *dma_ringalloc(struct dma_in
if (((desc_strtaddr + size - 1) & boundary) != (desc_strtaddr
& boundary)) {
*alignbits = dma_align_sizetobits(size);
- dma_free_coherent(di->dmadev, size, va, *descpa);
+ dma_free_coherent(di->dmadev, *alloced, va, *descpa);
va = dma_alloc_consistent(di, size, *alignbits,
alloced, descpa);
}