Jia-Ju Bai <baijiaju@xxxxxxxxxxxxxxx> wrote: > In p54p_tx(), skb->data is mapped to streaming DMA on line 337: > mapping = pci_map_single(..., skb->data, ...); > > Then skb->data is accessed on line 349: > desc->device_addr = ((struct p54_hdr *)skb->data)->req_id; > > This access may cause data inconsistency between CPU cache and hardware. > > To fix this problem, ((struct p54_hdr *)skb->data)->req_id is stored in > a local variable before DMA mapping, and then the driver accesses this > local variable instead of skb->data. > > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Jia-Ju Bai <baijiaju@xxxxxxxxxxxxxxx> > Acked-by: Christian Lamparter <chunkeey@xxxxxxxxx> Patch applied to wireless-drivers-next.git, thanks. 478762855b5a p54: avoid accessing the data mapped to streaming DMA -- https://patchwork.kernel.org/patch/11696391/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
