On Wed, Aug 29, 2018 at 2:24 PM Siva Rebbagondla <[email protected]> wrote: > > From: Sanjay Kumar Konduri <[email protected]> > > observed sometimes data is coming with unaligned address from kernel > BT stack. If unaligned address is passed, some data in payload is > stripped when packet is loading to firmware and this results, BT > connection timeout is happening. > > sh# hciconfig hci0 up > Can't init device hci0: hci0 command 0x0c03 tx timeout > > Fixed this by moving the data to aligned address. > > Signed-off-by: Sanjay Kumar Konduri <[email protected]> > Signed-off-by: Siva Rebbagondla <[email protected]> > --- > drivers/bluetooth/btrsi.c | 13 ++++++++++++- > 1 file changed, 12 insertions(+), 1 deletion(-) > > diff --git a/drivers/bluetooth/btrsi.c b/drivers/bluetooth/btrsi.c > index 60d1419..3951f7b 100644 > --- a/drivers/bluetooth/btrsi.c > +++ b/drivers/bluetooth/btrsi.c > @@ -21,8 +21,9 @@ > #include <net/rsi_91x.h> > #include <net/genetlink.h> > > -#define RSI_HEADROOM_FOR_BT_HAL 16 > +#define RSI_DMA_ALIGN 8 > #define RSI_FRAME_DESC_SIZE 16 > +#define RSI_HEADROOM_FOR_BT_HAL (RSI_FRAME_DESC_SIZE + RSI_DMA_ALIGN) > > struct rsi_hci_adapter { > void *priv; > @@ -70,6 +71,16 @@ static int rsi_hci_send_pkt(struct hci_dev *hdev, struct > sk_buff *skb) > bt_cb(new_skb)->pkt_type = hci_skb_pkt_type(skb); > kfree_skb(skb); > skb = new_skb; > + if (!IS_ALIGNED((unsigned long)skb->data, RSI_DMA_ALIGN)) { > + u8 *skb_data = skb->data; > + int skb_len = skb->len; > + > + skb_push(skb, RSI_DMA_ALIGN); > + skb_pull(skb, PTR_ALIGN(skb->data, > + RSI_DMA_ALIGN) - skb->data); > + memmove(skb->data, skb_data, skb_len); > + skb_trim(skb, skb_len); > + } > } > > return h_adapter->proto_ops->coex_send_pkt(h_adapter->priv, skb, > -- > 2.7.4 > Kindly ignore this. Instead of adding [email protected], I have added [email protected], which results, this patch is showing in linux-wireless patch work. I will resend this patch by removing, "linux-wireless" from mailing list.
Thanks, Siva Rebbagondla.
