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Bluetooth: btrsi: fix bt tx timeout issue

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[ Upstream commit 7cbfd1e2aad410d96fa6162aeb3f9cff1fecfc58 ]

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 <sanjay.konduri@redpinesignals.com>
Signed-off-by: Siva Rebbagondla <siva.rebbagondla@redpinesignals.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sanjay Kumar Konduri 2018-09-03 11:27:46 +05:30 committed by Greg Kroah-Hartman
parent 245b2765e8
commit 23a4059cd6
1 changed files with 12 additions and 1 deletions
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13
drivers/bluetooth/btrsi.c
View file

@ -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,