Re: [PATCH] wifi: brcmfmac: Set DMA direction for msgbuf packet IDs
Arend van Spriel <[email protected]>
| Newsgroups | org.kernel.vger.stable,dev.linux.lists.brcm80211,org.kernel.vger.linux-kernel,org.kernel.vger.linux-wireless |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 24 Jul 2026 17:25:30 +0800, Can Peng <[email protected]> wrote: > brcmf_msgbuf_init_pktids() takes the DMA direction from its callers, > but never stores it in the packet ID state. Since the state is zeroed, > pktids->direction remains DMA_BIDIRECTIONAL for both the TX and RX > packet ID pools. > > All msgbuf packet ID map and unmap paths use pktids->direction. As a > result, TX buffers requested with DMA_TO_DEVICE and RX buffers requested > with DMA_FROM_DEVICE are mapped and unmapped as DMA_BIDIRECTIONAL > instead. > > Store the caller-provided direction when initializing the packet ID > state. > > Fixes: 9a1bb60250d2 ("brcmfmac: Adding msgbuf protocol.") > Cc: [email protected] > Signed-off-by: Can Peng <[email protected]> > --- > drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c | 1 + > 1 file changed, 1 insertion(+) Acked-by: Arend van Spriel <[email protected]> Regards, Arend