6.12-stable review patch. If anyone has any objections, please let me know.
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From: Kiran K kiran.k@intel.com
[ Upstream commit d1af1f02ef8653dea4573e444136c8331189cd59 ]
Reuse the skb buffer provided by the PCIe driver to pass it onto the stack, instead of copying it to a new skb.
Fixes: c2b636b3f788 ("Bluetooth: btintel_pcie: Add support for PCIe transport") Signed-off-by: Kiran K kiran.k@intel.com Reviewed-by: Paul Menzel pmenzel@molgen.mpg.de Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/bluetooth/btintel_pcie.c | 33 ++++++++++++-------------------- 1 file changed, 12 insertions(+), 21 deletions(-)
diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c index ab465e13c1f60..3d6067927f7ea 100644 --- a/drivers/bluetooth/btintel_pcie.c +++ b/drivers/bluetooth/btintel_pcie.c @@ -581,8 +581,10 @@ static int btintel_pcie_recv_event(struct hci_dev *hdev, struct sk_buff *skb) /* This is a debug event that comes from IML and OP image when it * starts execution. There is no need pass this event to stack. */ - if (skb->data[2] == 0x97) + if (skb->data[2] == 0x97) { + hci_recv_diag(hdev, skb); return 0; + } }
return hci_recv_frame(hdev, skb); @@ -598,7 +600,6 @@ static int btintel_pcie_recv_frame(struct btintel_pcie_data *data, u8 pkt_type; u16 plen; u32 pcie_pkt_type; - struct sk_buff *new_skb; void *pdata; struct hci_dev *hdev = data->hdev;
@@ -675,24 +676,20 @@ static int btintel_pcie_recv_frame(struct btintel_pcie_data *data,
bt_dev_dbg(hdev, "pkt_type: 0x%2.2x len: %u", pkt_type, plen);
- new_skb = bt_skb_alloc(plen, GFP_ATOMIC); - if (!new_skb) { - bt_dev_err(hdev, "Failed to allocate memory for skb of len: %u", - skb->len); - ret = -ENOMEM; - goto exit_error; - } - - hci_skb_pkt_type(new_skb) = pkt_type; - skb_put_data(new_skb, skb->data, plen); + hci_skb_pkt_type(skb) = pkt_type; hdev->stat.byte_rx += plen; + skb_trim(skb, plen);
if (pcie_pkt_type == BTINTEL_PCIE_HCI_EVT_PKT) - ret = btintel_pcie_recv_event(hdev, new_skb); + ret = btintel_pcie_recv_event(hdev, skb); else - ret = hci_recv_frame(hdev, new_skb); + ret = hci_recv_frame(hdev, skb); + skb = NULL; /* skb is freed in the callee */
exit_error: + if (skb) + kfree_skb(skb); + if (ret) hdev->stat.err_rx++;
@@ -706,16 +703,10 @@ static void btintel_pcie_rx_work(struct work_struct *work) struct btintel_pcie_data *data = container_of(work, struct btintel_pcie_data, rx_work); struct sk_buff *skb; - int err; - struct hci_dev *hdev = data->hdev;
/* Process the sk_buf in queue and send to the HCI layer */ while ((skb = skb_dequeue(&data->rx_skb_q))) { - err = btintel_pcie_recv_frame(data, skb); - if (err) - bt_dev_err(hdev, "Failed to send received frame: %d", - err); - kfree_skb(skb); + btintel_pcie_recv_frame(data, skb); } }