Commit 8df9ffb8 authored by Marc Kleine-Budde's avatar Marc Kleine-Budde
Browse files

can: make use of preallocated can_ml_priv for per device struct can_dev_rcv_lists 



This patch removes the old method of allocating the per device protocol
specific memory via a netdevice_notifier. This had the drawback, that
the allocation can fail, leading to a lot of null pointer checks in the
code. This also makes the live cycle management of this memory quite
complicated.

This patch switches from the allocating the struct can_dev_rcv_lists in
a NETDEV_REGISTER call to using the dev->ml_priv, which is allocated by
the driver since the previous patch.

Signed-off-by: default avatarOleksij Rempel <o.rempel@pengutronix.de>
Acked-by: default avatarOliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent ffd956ee

drivers/net/can/dev.c

+2 −0
Original line number Diff line number Diff line
@@ -746,6 +746,8 @@ struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max, 
	priv = netdev_priv(dev);

	priv->dev = dev;



	dev->ml_priv = (void *)priv + ALIGN(sizeof_priv, NETDEV_ALIGN);



	if (echo_skb_max) {

		priv->echo_skb_max = echo_skb_max;

		priv->echo_skb = (void *)priv +

drivers/net/can/slcan.c

+1 −0
Original line number Diff line number Diff line
@@ -536,6 +536,7 @@ static struct slcan *slc_alloc(void) 


	dev->base_addr  = i;

	sl = netdev_priv(dev);

	dev->ml_priv = (void *)sl + ALIGN(sizeof(*sl), NETDEV_ALIGN);



	/* Initialize channel control data */

	sl->magic = SLCAN_MAGIC;

drivers/net/can/vcan.c

+1 −0
Original line number Diff line number Diff line
@@ -153,6 +153,7 @@ static void vcan_setup(struct net_device *dev) 
	dev->addr_len		= 0;

	dev->tx_queue_len	= 0;

	dev->flags		= IFF_NOARP;

	dev->ml_priv		= netdev_priv(dev);



	/* set flags according to driver capabilities */

	if (echo)

drivers/net/can/vxcan.c

+1 −0
Original line number Diff line number Diff line
@@ -147,6 +147,7 @@ static void vxcan_setup(struct net_device *dev) 
	dev->flags		= (IFF_NOARP|IFF_ECHO);

	dev->netdev_ops		= &vxcan_netdev_ops;

	dev->needs_free_netdev	= true;

	dev->ml_priv		= netdev_priv(dev) + ALIGN(sizeof(struct vxcan_priv), NETDEV_ALIGN);

}



/* forward declaration for rtnl_create_link() */

include/linux/can/can-ml.h

+0 −1
Original line number Diff line number Diff line
@@ -55,7 +55,6 @@ struct can_dev_rcv_lists { 
	struct hlist_head rx[RX_MAX];

	struct hlist_head rx_sff[CAN_SFF_RCV_ARRAY_SZ];

	struct hlist_head rx_eff[CAN_EFF_RCV_ARRAY_SZ];

	int remove_on_zero_entries;

	int entries;

};

CRA Git | Maintained and supported by SUSTech CRA and CCSE