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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/atm/idt77105.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ...
Diffstat (limited to 'drivers/atm/idt77105.c')
-rw-r--r--drivers/atm/idt77105.c375
1 files changed, 375 insertions, 0 deletions
diff --git a/drivers/atm/idt77105.c b/drivers/atm/idt77105.c
new file mode 100644
index 000000000..bfca7b8a6
--- /dev/null
+++ b/drivers/atm/idt77105.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* drivers/atm/idt77105.c - IDT77105 (PHY) driver */
+
+/* Written 1999 by Greg Banks, NEC Australia <gnb@linuxfan.com>. Based on suni.c */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/capability.h>
+#include <linux/atm_idt77105.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <asm/param.h>
+#include <linux/uaccess.h>
+
+#include "idt77105.h"
+
+#undef GENERAL_DEBUG
+
+#ifdef GENERAL_DEBUG
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+struct idt77105_priv {
+ struct idt77105_stats stats; /* link diagnostics */
+ struct atm_dev *dev; /* device back-pointer */
+ struct idt77105_priv *next;
+ int loop_mode;
+ unsigned char old_mcr; /* storage of MCR reg while signal lost */
+};
+
+static DEFINE_SPINLOCK(idt77105_priv_lock);
+
+#define PRIV(dev) ((struct idt77105_priv *) dev->phy_data)
+
+#define PUT(val,reg) dev->ops->phy_put(dev,val,IDT77105_##reg)
+#define GET(reg) dev->ops->phy_get(dev,IDT77105_##reg)
+
+static void idt77105_stats_timer_func(struct timer_list *);
+static void idt77105_restart_timer_func(struct timer_list *);
+
+
+static DEFINE_TIMER(stats_timer, idt77105_stats_timer_func);
+static DEFINE_TIMER(restart_timer, idt77105_restart_timer_func);
+static int start_timer = 1;
+static struct idt77105_priv *idt77105_all = NULL;
+
+/*
+ * Retrieve the value of one of the IDT77105's counters.
+ * `counter' is one of the IDT77105_CTRSEL_* constants.
+ */
+static u16 get_counter(struct atm_dev *dev, int counter)
+{
+ u16 val;
+
+ /* write the counter bit into PHY register 6 */
+ PUT(counter, CTRSEL);
+ /* read the low 8 bits from register 4 */
+ val = GET(CTRLO);
+ /* read the high 8 bits from register 5 */
+ val |= GET(CTRHI)<<8;
+
+ return val;
+}
+
+/*
+ * Timer function called every second to gather statistics
+ * from the 77105. This is done because the h/w registers
+ * will overflow if not read at least once per second. The
+ * kernel's stats are much higher precision. Also, having
+ * a separate copy of the stats allows implementation of
+ * an ioctl which gathers the stats *without* zero'ing them.
+ */
+static void idt77105_stats_timer_func(struct timer_list *unused)
+{
+ struct idt77105_priv *walk;
+ struct atm_dev *dev;
+ struct idt77105_stats *stats;
+
+ DPRINTK("IDT77105 gathering statistics\n");
+ for (walk = idt77105_all; walk; walk = walk->next) {
+ dev = walk->dev;
+
+ stats = &walk->stats;
+ stats->symbol_errors += get_counter(dev, IDT77105_CTRSEL_SEC);
+ stats->tx_cells += get_counter(dev, IDT77105_CTRSEL_TCC);
+ stats->rx_cells += get_counter(dev, IDT77105_CTRSEL_RCC);
+ stats->rx_hec_errors += get_counter(dev, IDT77105_CTRSEL_RHEC);
+ }
+ if (!start_timer) mod_timer(&stats_timer,jiffies+IDT77105_STATS_TIMER_PERIOD);
+}
+
+
+/*
+ * A separate timer func which handles restarting PHY chips which
+ * have had the cable re-inserted after being pulled out. This is
+ * done by polling the Good Signal Bit in the Interrupt Status
+ * register every 5 seconds. The other technique (checking Good
+ * Signal Bit in the interrupt handler) cannot be used because PHY
+ * interrupts need to be disabled when the cable is pulled out
+ * to avoid lots of spurious cell error interrupts.
+ */
+static void idt77105_restart_timer_func(struct timer_list *unused)
+{
+ struct idt77105_priv *walk;
+ struct atm_dev *dev;
+ unsigned char istat;
+
+ DPRINTK("IDT77105 checking for cable re-insertion\n");
+ for (walk = idt77105_all; walk; walk = walk->next) {
+ dev = walk->dev;
+
+ if (dev->signal != ATM_PHY_SIG_LOST)
+ continue;
+
+ istat = GET(ISTAT); /* side effect: clears all interrupt status bits */
+ if (istat & IDT77105_ISTAT_GOODSIG) {
+ /* Found signal again */
+ atm_dev_signal_change(dev, ATM_PHY_SIG_FOUND);
+ printk(KERN_NOTICE "%s(itf %d): signal detected again\n",
+ dev->type,dev->number);
+ /* flush the receive FIFO */
+ PUT( GET(DIAG) | IDT77105_DIAG_RFLUSH, DIAG);
+ /* re-enable interrupts */
+ PUT( walk->old_mcr ,MCR);
+ }
+ }
+ if (!start_timer) mod_timer(&restart_timer,jiffies+IDT77105_RESTART_TIMER_PERIOD);
+}
+
+
+static int fetch_stats(struct atm_dev *dev,struct idt77105_stats __user *arg,int zero)
+{
+ unsigned long flags;
+ struct idt77105_stats stats;
+
+ spin_lock_irqsave(&idt77105_priv_lock, flags);
+ memcpy(&stats, &PRIV(dev)->stats, sizeof(struct idt77105_stats));
+ if (zero)
+ memset(&PRIV(dev)->stats, 0, sizeof(struct idt77105_stats));
+ spin_unlock_irqrestore(&idt77105_priv_lock, flags);
+ if (arg == NULL)
+ return 0;
+ return copy_to_user(arg, &stats,
+ sizeof(struct idt77105_stats)) ? -EFAULT : 0;
+}
+
+
+static int set_loopback(struct atm_dev *dev,int mode)
+{
+ int diag;
+
+ diag = GET(DIAG) & ~IDT77105_DIAG_LCMASK;
+ switch (mode) {
+ case ATM_LM_NONE:
+ break;
+ case ATM_LM_LOC_ATM:
+ diag |= IDT77105_DIAG_LC_PHY_LOOPBACK;
+ break;
+ case ATM_LM_RMT_ATM:
+ diag |= IDT77105_DIAG_LC_LINE_LOOPBACK;
+ break;
+ default:
+ return -EINVAL;
+ }
+ PUT(diag,DIAG);
+ printk(KERN_NOTICE "%s(%d) Loopback mode is: %s\n", dev->type,
+ dev->number,
+ (mode == ATM_LM_NONE ? "NONE" :
+ (mode == ATM_LM_LOC_ATM ? "DIAG (local)" :
+ (mode == IDT77105_DIAG_LC_LINE_LOOPBACK ? "LOOP (remote)" :
+ "unknown")))
+ );
+ PRIV(dev)->loop_mode = mode;
+ return 0;
+}
+
+
+static int idt77105_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
+{
+ printk(KERN_NOTICE "%s(%d) idt77105_ioctl() called\n",dev->type,dev->number);
+ switch (cmd) {
+ case IDT77105_GETSTATZ:
+ if (!capable(CAP_NET_ADMIN)) return -EPERM;
+ fallthrough;
+ case IDT77105_GETSTAT:
+ return fetch_stats(dev, arg, cmd == IDT77105_GETSTATZ);
+ case ATM_SETLOOP:
+ return set_loopback(dev,(int)(unsigned long) arg);
+ case ATM_GETLOOP:
+ return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
+ -EFAULT : 0;
+ case ATM_QUERYLOOP:
+ return put_user(ATM_LM_LOC_ATM | ATM_LM_RMT_ATM,
+ (int __user *) arg) ? -EFAULT : 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+
+
+static void idt77105_int(struct atm_dev *dev)
+{
+ unsigned char istat;
+
+ istat = GET(ISTAT); /* side effect: clears all interrupt status bits */
+
+ DPRINTK("IDT77105 generated an interrupt, istat=%02x\n", (unsigned)istat);
+
+ if (istat & IDT77105_ISTAT_RSCC) {
+ /* Rx Signal Condition Change - line went up or down */
+ if (istat & IDT77105_ISTAT_GOODSIG) { /* signal detected again */
+ /* This should not happen (restart timer does it) but JIC */
+ atm_dev_signal_change(dev, ATM_PHY_SIG_FOUND);
+ } else { /* signal lost */
+ /*
+ * Disable interrupts and stop all transmission and
+ * reception - the restart timer will restore these.
+ */
+ PRIV(dev)->old_mcr = GET(MCR);
+ PUT(
+ (PRIV(dev)->old_mcr|
+ IDT77105_MCR_DREC|
+ IDT77105_MCR_DRIC|
+ IDT77105_MCR_HALTTX
+ ) & ~IDT77105_MCR_EIP, MCR);
+ atm_dev_signal_change(dev, ATM_PHY_SIG_LOST);
+ printk(KERN_NOTICE "%s(itf %d): signal lost\n",
+ dev->type,dev->number);
+ }
+ }
+
+ if (istat & IDT77105_ISTAT_RFO) {
+ /* Rx FIFO Overrun -- perform a FIFO flush */
+ PUT( GET(DIAG) | IDT77105_DIAG_RFLUSH, DIAG);
+ printk(KERN_NOTICE "%s(itf %d): receive FIFO overrun\n",
+ dev->type,dev->number);
+ }
+#ifdef GENERAL_DEBUG
+ if (istat & (IDT77105_ISTAT_HECERR | IDT77105_ISTAT_SCR |
+ IDT77105_ISTAT_RSE)) {
+ /* normally don't care - just report in stats */
+ printk(KERN_NOTICE "%s(itf %d): received cell with error\n",
+ dev->type,dev->number);
+ }
+#endif
+}
+
+
+static int idt77105_start(struct atm_dev *dev)
+{
+ unsigned long flags;
+
+ if (!(dev->phy_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL)))
+ return -ENOMEM;
+ PRIV(dev)->dev = dev;
+ spin_lock_irqsave(&idt77105_priv_lock, flags);
+ PRIV(dev)->next = idt77105_all;
+ idt77105_all = PRIV(dev);
+ spin_unlock_irqrestore(&idt77105_priv_lock, flags);
+ memset(&PRIV(dev)->stats,0,sizeof(struct idt77105_stats));
+
+ /* initialise dev->signal from Good Signal Bit */
+ atm_dev_signal_change(dev,
+ GET(ISTAT) & IDT77105_ISTAT_GOODSIG ?
+ ATM_PHY_SIG_FOUND : ATM_PHY_SIG_LOST);
+ if (dev->signal == ATM_PHY_SIG_LOST)
+ printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
+ dev->number);
+
+ /* initialise loop mode from hardware */
+ switch ( GET(DIAG) & IDT77105_DIAG_LCMASK ) {
+ case IDT77105_DIAG_LC_NORMAL:
+ PRIV(dev)->loop_mode = ATM_LM_NONE;
+ break;
+ case IDT77105_DIAG_LC_PHY_LOOPBACK:
+ PRIV(dev)->loop_mode = ATM_LM_LOC_ATM;
+ break;
+ case IDT77105_DIAG_LC_LINE_LOOPBACK:
+ PRIV(dev)->loop_mode = ATM_LM_RMT_ATM;
+ break;
+ }
+
+ /* enable interrupts, e.g. on loss of signal */
+ PRIV(dev)->old_mcr = GET(MCR);
+ if (dev->signal == ATM_PHY_SIG_FOUND) {
+ PRIV(dev)->old_mcr |= IDT77105_MCR_EIP;
+ PUT(PRIV(dev)->old_mcr, MCR);
+ }
+
+
+ idt77105_stats_timer_func(0); /* clear 77105 counters */
+ (void) fetch_stats(dev,NULL,1); /* clear kernel counters */
+
+ spin_lock_irqsave(&idt77105_priv_lock, flags);
+ if (start_timer) {
+ start_timer = 0;
+
+ stats_timer.expires = jiffies+IDT77105_STATS_TIMER_PERIOD;
+ add_timer(&stats_timer);
+
+ restart_timer.expires = jiffies+IDT77105_RESTART_TIMER_PERIOD;
+ add_timer(&restart_timer);
+ }
+ spin_unlock_irqrestore(&idt77105_priv_lock, flags);
+ return 0;
+}
+
+
+static int idt77105_stop(struct atm_dev *dev)
+{
+ struct idt77105_priv *walk, *prev;
+
+ DPRINTK("%s(itf %d): stopping IDT77105\n",dev->type,dev->number);
+
+ /* disable interrupts */
+ PUT( GET(MCR) & ~IDT77105_MCR_EIP, MCR );
+
+ /* detach private struct from atm_dev & free */
+ for (prev = NULL, walk = idt77105_all ;
+ walk != NULL;
+ prev = walk, walk = walk->next) {
+ if (walk->dev == dev) {
+ if (prev != NULL)
+ prev->next = walk->next;
+ else
+ idt77105_all = walk->next;
+ dev->phy = NULL;
+ dev->phy_data = NULL;
+ kfree(walk);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+static const struct atmphy_ops idt77105_ops = {
+ .start = idt77105_start,
+ .ioctl = idt77105_ioctl,
+ .interrupt = idt77105_int,
+ .stop = idt77105_stop,
+};
+
+
+int idt77105_init(struct atm_dev *dev)
+{
+ dev->phy = &idt77105_ops;
+ return 0;
+}
+
+EXPORT_SYMBOL(idt77105_init);
+
+static void __exit idt77105_exit(void)
+{
+ /* turn off timers */
+ del_timer_sync(&stats_timer);
+ del_timer_sync(&restart_timer);
+}
+
+module_exit(idt77105_exit);
+
+MODULE_LICENSE("GPL");