Merge tag 'net-6.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from can, xfrm, bluetooth and netfilter.

  Current release - regressions:

   - ipv6: fix RCU splat in ipv6_route_seq_show()

   - wifi: iwlwifi: disable RFI feature

  Previous releases - regressions:

   - tcp: fix possible sk_priority leak in tcp_v4_send_reset()

   - tipc: do not update mtu if msg_max is too small in mtu negotiation

   - netfilter: fix null deref on element insertion

   - devlink: change per-devlink netdev notifier to static one

   - phylink: fix ksettings_set() ethtool call

   - wifi: mac80211: fortify the spinlock against deadlock by interrupt

   - wifi: brcmfmac: check for probe() id argument being NULL

   - eth: ice:
      - fix undersized tx_flags variable
      - fix ice VF reset during iavf initialization

   - eth: hns3: fix sending pfc frames after reset issue

  Previous releases - always broken:

   - xfrm: release all offloaded policy memory

   - nsh: use correct mac_offset to unwind gso skb in nsh_gso_segment()

   - vsock: avoid to close connected socket after the timeout

   - dsa: rzn1-a5psw: enable management frames for CPU port

   - eth: virtio_net: fix error unwinding of XDP initialization

   - eth: tun: fix memory leak for detached NAPI queue.

  Misc:

   - MAINTAINERS: sctp: move Neil to CREDITS"

* tag 'net-6.4-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (107 commits)
  MAINTAINERS: skip CCing netdev for Bluetooth patches
  mdio_bus: unhide mdio_bus_init prototype
  bridge: always declare tunnel functions
  atm: hide unused procfs functions
  net: isa: include net/Space.h
  Revert "ARM: dts: stm32: add CAN support on stm32f746"
  netfilter: nft_set_rbtree: fix null deref on element insertion
  netfilter: nf_tables: fix nft_trans type confusion
  netfilter: conntrack: define variables exp_nat_nla_policy and any_addr with CONFIG_NF_NAT
  net: wwan: t7xx: Ensure init is completed before system sleep
  net: selftests: Fix optstring
  net: pcs: xpcs: fix C73 AN not getting enabled
  net: wwan: iosm: fix NULL pointer dereference when removing device
  vlan: fix a potential uninit-value in vlan_dev_hard_start_xmit()
  mailmap: add entries for Nikolay Aleksandrov
  igb: fix bit_shift to be in [1..8] range
  net: dsa: mv88e6xxx: Fix mv88e6393x EPC write command offset
  cassini: Fix a memory leak in the error handling path of cas_init_one()
  tun: Fix memory leak for detached NAPI queue.
  can: kvaser_pciefd: Disable interrupts in probe error path
  ...

1 files changed, 29 insertions, 22 deletions

diff --git a/drivers/net/can/kvaser_pciefd.c b/drivers/net/can/kvaser_pciefd.c
index 53e8a914c88b..be189edb256c 100644
--- a/drivers/net/can/kvaser_pciefd.c
+++ b/drivers/net/can/kvaser_pciefd.c
@@ -71,10 +71,12 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 #define KVASER_PCIEFD_SYSID_BUILD_REG (KVASER_PCIEFD_SYSID_BASE + 0x14)
 /* Shared receive buffer registers */
 #define KVASER_PCIEFD_SRB_BASE 0x1f200
+#define KVASER_PCIEFD_SRB_FIFO_LAST_REG (KVASER_PCIEFD_SRB_BASE + 0x1f4)
 #define KVASER_PCIEFD_SRB_CMD_REG (KVASER_PCIEFD_SRB_BASE + 0x200)
 #define KVASER_PCIEFD_SRB_IEN_REG (KVASER_PCIEFD_SRB_BASE + 0x204)
 #define KVASER_PCIEFD_SRB_IRQ_REG (KVASER_PCIEFD_SRB_BASE + 0x20c)
 #define KVASER_PCIEFD_SRB_STAT_REG (KVASER_PCIEFD_SRB_BASE + 0x210)
+#define KVASER_PCIEFD_SRB_RX_NR_PACKETS_REG (KVASER_PCIEFD_SRB_BASE + 0x214)
 #define KVASER_PCIEFD_SRB_CTRL_REG (KVASER_PCIEFD_SRB_BASE + 0x218)
 /* EPCS flash controller registers */
 #define KVASER_PCIEFD_SPI_BASE 0x1fc00
@@ -111,6 +113,9 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 /* DMA support */
 #define KVASER_PCIEFD_SRB_STAT_DMA BIT(24)
 
+/* SRB current packet level */
+#define KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK 0xff
+
 /* DMA Enable */
 #define KVASER_PCIEFD_SRB_CTRL_DMA_ENABLE BIT(0)
 
@@ -526,7 +531,7 @@ static int kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can)
 	      KVASER_PCIEFD_KCAN_IRQ_TOF | KVASER_PCIEFD_KCAN_IRQ_ABD |
 	      KVASER_PCIEFD_KCAN_IRQ_TAE | KVASER_PCIEFD_KCAN_IRQ_TAL |
 	      KVASER_PCIEFD_KCAN_IRQ_FDIC | KVASER_PCIEFD_KCAN_IRQ_BPP |
-	      KVASER_PCIEFD_KCAN_IRQ_TAR | KVASER_PCIEFD_KCAN_IRQ_TFD;
+	      KVASER_PCIEFD_KCAN_IRQ_TAR;
 
 	iowrite32(msk, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 
@@ -554,6 +559,8 @@ static void kvaser_pciefd_setup_controller(struct kvaser_pciefd_can *can)
 
 	if (can->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
 		mode |= KVASER_PCIEFD_KCAN_MODE_LOM;
+	else
+		mode &= ~KVASER_PCIEFD_KCAN_MODE_LOM;
 
 	mode |= KVASER_PCIEFD_KCAN_MODE_EEN;
 	mode |= KVASER_PCIEFD_KCAN_MODE_EPEN;
@@ -572,7 +579,7 @@ static void kvaser_pciefd_start_controller_flush(struct kvaser_pciefd_can *can)
 
 	spin_lock_irqsave(&can->lock, irq);
 	iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG);
-	iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD | KVASER_PCIEFD_KCAN_IRQ_TFD,
+	iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD,
 		  can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 
 	status = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_STAT_REG);
@@ -615,7 +622,7 @@ static int kvaser_pciefd_bus_on(struct kvaser_pciefd_can *can)
 	iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 	iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG);
 
-	iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD | KVASER_PCIEFD_KCAN_IRQ_TFD,
+	iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD,
 		  can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 
 	mode = ioread32(can->reg_base + KVASER_PCIEFD_KCAN_MODE_REG);
@@ -719,6 +726,7 @@ static int kvaser_pciefd_stop(struct net_device *netdev)
 		iowrite32(0, can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 		del_timer(&can->bec_poll_timer);
 	}
+	can->can.state = CAN_STATE_STOPPED;
 	close_candev(netdev);
 
 	return ret;
@@ -1007,8 +1015,7 @@ static int kvaser_pciefd_setup_can_ctrls(struct kvaser_pciefd *pcie)
 		SET_NETDEV_DEV(netdev, &pcie->pci->dev);
 
 		iowrite32(-1, can->reg_base + KVASER_PCIEFD_KCAN_IRQ_REG);
-		iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD |
-			  KVASER_PCIEFD_KCAN_IRQ_TFD,
+		iowrite32(KVASER_PCIEFD_KCAN_IRQ_ABD,
 			  can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 
 		pcie->can[i] = can;
@@ -1058,6 +1065,7 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie)
 {
 	int i;
 	u32 srb_status;
+	u32 srb_packet_count;
 	dma_addr_t dma_addr[KVASER_PCIEFD_DMA_COUNT];
 
 	/* Disable the DMA */
@@ -1085,6 +1093,15 @@ static int kvaser_pciefd_setup_dma(struct kvaser_pciefd *pcie)
 		  KVASER_PCIEFD_SRB_CMD_RDB1,
 		  pcie->reg_base + KVASER_PCIEFD_SRB_CMD_REG);
 
+	/* Empty Rx FIFO */
+	srb_packet_count = ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_RX_NR_PACKETS_REG) &
+			   KVASER_PCIEFD_SRB_RX_NR_PACKETS_MASK;
+	while (srb_packet_count) {
+		/* Drop current packet in FIFO */
+		ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_FIFO_LAST_REG);
+		srb_packet_count--;
+	}
+
 	srb_status = ioread32(pcie->reg_base + KVASER_PCIEFD_SRB_STAT_REG);
 	if (!(srb_status & KVASER_PCIEFD_SRB_STAT_DI)) {
 		dev_err(&pcie->pci->dev, "DMA not idle before enabling\n");
@@ -1425,9 +1442,6 @@ static int kvaser_pciefd_handle_status_packet(struct kvaser_pciefd *pcie,
 		cmd = KVASER_PCIEFD_KCAN_CMD_AT;
 		cmd |= ++can->cmd_seq << KVASER_PCIEFD_KCAN_CMD_SEQ_SHIFT;
 		iowrite32(cmd, can->reg_base + KVASER_PCIEFD_KCAN_CMD_REG);
-
-		iowrite32(KVASER_PCIEFD_KCAN_IRQ_TFD,
-			  can->reg_base + KVASER_PCIEFD_KCAN_IEN_REG);
 	} else if (p->header[0] & KVASER_PCIEFD_SPACK_IDET &&
 		   p->header[0] & KVASER_PCIEFD_SPACK_IRM &&
 		   cmdseq == (p->header[1] & KVASER_PCIEFD_PACKET_SEQ_MSK) &&
@@ -1714,15 +1728,6 @@ static int kvaser_pciefd_transmit_irq(struct kvaser_pciefd_can *can)
 	if (irq & KVASER_PCIEFD_KCAN_IRQ_TOF)
 		netdev_err(can->can.dev, "Tx FIFO overflow\n");
 
-	if (irq & KVASER_PCIEFD_KCAN_IRQ_TFD) {
-		u8 count = ioread32(can->reg_base +
-				    KVASER_PCIEFD_KCAN_TX_NPACKETS_REG) & 0xff;
-
-		if (count == 0)
-			iowrite32(KVASER_PCIEFD_KCAN_CTRL_EFLUSH,
-				  can->reg_base + KVASER_PCIEFD_KCAN_CTRL_REG);
-	}
-
 	if (irq & KVASER_PCIEFD_KCAN_IRQ_BPP)
 		netdev_err(can->can.dev,
 			   "Fail to change bittiming, when not in reset mode\n");
@@ -1824,6 +1829,11 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	if (err)
 		goto err_teardown_can_ctrls;
 
+	err = request_irq(pcie->pci->irq, kvaser_pciefd_irq_handler,
+			  IRQF_SHARED, KVASER_PCIEFD_DRV_NAME, pcie);
+	if (err)
+		goto err_teardown_can_ctrls;
+
 	iowrite32(KVASER_PCIEFD_SRB_IRQ_DPD0 | KVASER_PCIEFD_SRB_IRQ_DPD1,
 		  pcie->reg_base + KVASER_PCIEFD_SRB_IRQ_REG);
 
@@ -1844,11 +1854,6 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	iowrite32(KVASER_PCIEFD_SRB_CMD_RDB1,
 		  pcie->reg_base + KVASER_PCIEFD_SRB_CMD_REG);
 
-	err = request_irq(pcie->pci->irq, kvaser_pciefd_irq_handler,
-			  IRQF_SHARED, KVASER_PCIEFD_DRV_NAME, pcie);
-	if (err)
-		goto err_teardown_can_ctrls;
-
 	err = kvaser_pciefd_reg_candev(pcie);
 	if (err)
 		goto err_free_irq;
@@ -1856,6 +1861,8 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	return 0;
 
 err_free_irq:
+	/* Disable PCI interrupts */
+	iowrite32(0, pcie->reg_base + KVASER_PCIEFD_IEN_REG);
 	free_irq(pcie->pci->irq, pcie);
 
 err_teardown_can_ctrls: