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Commit a1b0b941 authored by Christophe Ricard's avatar Christophe Ricard Committed by Samuel Ortiz
Browse files

NFC: nci: Create pipe on specific gate in nci_hci_connect_gate 



Some gates might need to have their pipes explicitly created.
Add a call to nci_hci_create_pipe in nci_hci_connect_gate for
every gate that is different than NCI_HCI_LINK_MGMT_GATE or
NCI_HCI_ADMIN_GATE.

In case of an error when opening a pipe, like in hci layer,
delete the pipe if it was created.

Signed-off-by: default avatarChristophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 8a49943f

net/nfc/nci/hci.c

+55 −1
Original line number Diff line number Diff line
@@ -79,6 +79,8 @@ struct nci_hcp_packet { 
#define NCI_EVT_HOT_PLUG           0x03



#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY       0x01

#define NCI_HCI_ADM_CREATE_PIPE			0x10

#define NCI_HCI_ADM_DELETE_PIPE			0x11



/* HCP headers */

#define NCI_HCI_HCP_PACKET_HEADER_LEN      1
@@ -523,6 +525,43 @@ int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe) 
}

EXPORT_SYMBOL(nci_hci_open_pipe);



static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host,

			      u8 dest_gate, int *result)

{

	u8 pipe;

	struct sk_buff *skb;

	struct nci_hci_create_pipe_params params;

	struct nci_hci_create_pipe_resp *resp;



	pr_debug("gate=%d\n", dest_gate);



	params.src_gate = NCI_HCI_ADMIN_GATE;

	params.dest_host = dest_host;

	params.dest_gate = dest_gate;



	*result = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,

				   NCI_HCI_ADM_CREATE_PIPE,

				   (u8 *)&params, sizeof(params), &skb);

	if (*result < 0)

		return NCI_HCI_INVALID_PIPE;



	resp = (struct nci_hci_create_pipe_resp *)skb->data;

	pipe = resp->pipe;

	kfree_skb(skb);



	pr_debug("pipe created=%d\n", pipe);



	return pipe;

}



static int nci_hci_delete_pipe(struct nci_dev *ndev, u8 pipe)

{

	pr_debug("\n");



	return nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,

				NCI_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);

}



int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,

		      const u8 *param, size_t param_len)

{
@@ -616,6 +655,7 @@ EXPORT_SYMBOL(nci_hci_get_param); 
int nci_hci_connect_gate(struct nci_dev *ndev,

			 u8 dest_host, u8 dest_gate, u8 pipe)

{

	bool pipe_created = false;

	int r;



	if (pipe == NCI_HCI_DO_NOT_OPEN_PIPE)
@@ -634,12 +674,26 @@ int nci_hci_connect_gate(struct nci_dev *ndev, 
	case NCI_HCI_ADMIN_GATE:

		pipe = NCI_HCI_ADMIN_PIPE;

	break;

	default:

		pipe = nci_hci_create_pipe(ndev, dest_host, dest_gate, &r);

		if (pipe < 0)

			return r;

		pipe_created = true;

		break;

	}



open_pipe:

	r = nci_hci_open_pipe(ndev, pipe);

	if (r < 0)

	if (r < 0) {

		if (pipe_created) {

			if (nci_hci_delete_pipe(ndev, pipe) < 0) {

				/* TODO: Cannot clean by deleting pipe...

				 * -> inconsistent state

				 */

			}

		}

		return r;

	}



	ndev->hci_dev->pipes[pipe].gate = dest_gate;

	ndev->hci_dev->pipes[pipe].host = dest_host;