4.19-stable review patch. If anyone has any objections, please let me know.
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From: Francesco Dolcini francesco.dolcini@toradex.com
[ Upstream commit 64057f051f20c2a2184b9db7f8037d928d68a4f4 ]
Serdev recv_buf() callback is supposed to return the amount of bytes consumed, therefore an int in between 0 and count.
Do not return negative number in case of issue, just print an error and return count. This fixes a WARN in ttyport_receive_buf().
Link: https://lore.kernel.org/all/087be419-ec6b-47ad-851a-5e1e3ea5cfcc@kernel.org/ Fixes: 7237c4c9ec92 ("Bluetooth: mediatek: Add protocol support for MediaTek serial devices") Signed-off-by: Francesco Dolcini francesco.dolcini@toradex.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/bluetooth/btmtkuart.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c index 19eecf198321..cda13194b131 100644 --- a/drivers/bluetooth/btmtkuart.c +++ b/drivers/bluetooth/btmtkuart.c @@ -317,7 +317,7 @@ mtk_stp_split(struct btmtkuart_dev *bdev, const unsigned char *data, int count, return data; }
-static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) +static void btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) { struct btmtkuart_dev *bdev = hci_get_drvdata(hdev); const unsigned char *p_left = data, *p_h4; @@ -356,25 +356,20 @@ static int btmtkuart_recv(struct hci_dev *hdev, const u8 *data, size_t count) bt_dev_err(bdev->hdev, "Frame reassembly failed (%d)", err); bdev->rx_skb = NULL; - return err; + return; }
sz_left -= sz_h4; p_left += sz_h4; } - - return 0; }
static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data, size_t count) { struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev); - int err;
- err = btmtkuart_recv(bdev->hdev, data, count); - if (err < 0) - return err; + btmtkuart_recv(bdev->hdev, data, count);
bdev->hdev->stat.byte_rx += count;