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HID: logitech-hidpp: split g920_get_config()
Original version of g920_get_config() contained two kind of actions:
1. Device specific communication to query/set some parameters
which requires active communication channel with the device,
or, put in other way, for the call to be sandwiched between
hid_device_io_start() and hid_device_io_stop().
2. Input subsystem specific FF controller initialization which, in
order to access a valid 'struct hid_input' via
'hid->inputs.next', requires claimed hidinput which means be
executed after the call to hid_hw_start() with connect_mask
containing HID_CONNECT_HIDINPUT.
Location of g920_get_config() can only fulfill requirements for #1 and
not #2, which might result in following backtrace:
[ 88.312258] logitech-hidpp-device 0003:046D:C262.0005: HID++ 4.2 device connected.
[ 88.320298] BUG: kernel NULL pointer dereference, address: 0000000000000018
[ 88.320304] #PF: supervisor read access in kernel mode
[ 88.320307] #PF: error_code(0x0000) - not-present page
[ 88.320309] PGD 0 P4D 0
[ 88.320315] Oops: 0000 [#1] SMP PTI
[ 88.320320] CPU: 1 PID: 3080 Comm: systemd-udevd Not tainted 5.4.0-rc1+ #31
[ 88.320322] Hardware name: Apple Inc. MacBookPro11,1/Mac-189A3D4F975D5FFC, BIOS 149.0.0.0.0 09/17/2018
[ 88.320334] RIP: 0010:hidpp_probe+0x61f/0x948 [hid_logitech_hidpp]
[ 88.320338] Code: 81 00 00 48 89 ef e8 f0 d6 ff ff 41 89 c6 85 c0 75 b5 0f b6 44 24 28 48 8b 5d 00 88 44 24 1e 89 44 24 0c 48 8b 83 18 1c 00 00 <48> 8b 48 18 48 8b 83 10 19 00 00 48 8b 40 40 48 89 0c 24 0f b7 80
[ 88.320341] RSP: 0018:ffffb0a6824aba68 EFLAGS: 00010246
[ 88.320345] RAX: 0000000000000000 RBX: ffff93a50756e000 RCX: 0000000000010408
[ 88.320347] RDX: 0000000000000000 RSI: ffff93a51f0ad0a0 RDI: 000000000002d0a0
[ 88.320350] RBP: ffff93a50416da28 R08: ffff93a50416da70 R09: ffff93a50416da70
[ 88.320352] R10: 000000148ae9e60c R11: 00000000000f1525 R12: ffff93a50756e000
[ 88.320354] R13: ffff93a50756f8d0 R14: 0000000000000000 R15: ffff93a50756fc38
[ 88.320358] FS: 00007f8d8c1e0940(0000) GS:ffff93a51f080000(0000) knlGS:0000000000000000
[ 88.320361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 88.320363] CR2: 0000000000000018 CR3: 00000003996d8003 CR4: 00000000001606e0
[ 88.320366] Call Trace:
[ 88.320377] ? _cond_resched+0x15/0x30
[ 88.320387] ? create_pinctrl+0x2f/0x3c0
[ 88.320393] ? kernfs_link_sibling+0x94/0xe0
[ 88.320398] ? _cond_resched+0x15/0x30
[ 88.320402] ? kernfs_activate+0x5f/0x80
[ 88.320406] ? kernfs_add_one+0xe2/0x130
[ 88.320411] hid_device_probe+0x106/0x170
[ 88.320419] really_probe+0x147/0x3c0
[ 88.320424] driver_probe_device+0xb6/0x100
[ 88.320428] device_driver_attach+0x53/0x60
[ 88.320433] __driver_attach+0x8a/0x150
[ 88.320437] ? device_driver_attach+0x60/0x60
[ 88.320440] bus_for_each_dev+0x78/0xc0
[ 88.320445] bus_add_driver+0x14d/0x1f0
[ 88.320450] driver_register+0x6c/0xc0
[ 88.320453] ? 0xffffffffc0d67000
[ 88.320457] __hid_register_driver+0x4c/0x80
[ 88.320464] do_one_initcall+0x46/0x1f4
[ 88.320469] ? _cond_resched+0x15/0x30
[ 88.320474] ? kmem_cache_alloc_trace+0x162/0x220
[ 88.320481] ? do_init_module+0x23/0x230
[ 88.320486] do_init_module+0x5c/0x230
[ 88.320491] load_module+0x26e1/0x2990
[ 88.320502] ? ima_post_read_file+0xf0/0x100
[ 88.320508] ? __do_sys_finit_module+0xaa/0x110
[ 88.320512] __do_sys_finit_module+0xaa/0x110
[ 88.320520] do_syscall_64+0x5b/0x180
[ 88.320525] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 88.320528] RIP: 0033:0x7f8d8d1f01fd
[ 88.320532] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 5b 8c 0c 00 f7 d8 64 89 01 48
[ 88.320535] RSP: 002b:00007ffefa3bb068 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 88.320539] RAX: ffffffffffffffda RBX: 000055922040cb40 RCX: 00007f8d8d1f01fd
[ 88.320541] RDX: 0000000000000000 RSI: 00007f8d8ce4984d RDI: 0000000000000006
[ 88.320543] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000007
[ 88.320545] R10: 0000000000000006 R11: 0000000000000246 R12: 00007f8d8ce4984d
[ 88.320547] R13: 0000000000000000 R14: 000055922040efc0 R15: 000055922040cb40
[ 88.320551] Modules linked in: hid_logitech_hidpp(+) fuse rfcomm ccm xt_CHECKSUM xt_MASQUERADE bridge stp llc nf_nat_tftp nf_conntrack_tftp nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat tun iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables cmac bnep sunrpc dm_crypt nls_utf8 hfsplus intel_rapl_msr intel_rapl_common ath9k_htc ath9k_common x86_pkg_temp_thermal intel_powerclamp b43 ath9k_hw coretemp snd_hda_codec_hdmi cordic kvm_intel snd_hda_codec_cirrus mac80211 snd_hda_codec_generic ledtrig_audio kvm snd_hda_intel snd_intel_nhlt irqbypass snd_hda_codec btusb btrtl snd_hda_core ath btbcm ssb snd_hwdep btintel snd_seq crct10dif_pclmul iTCO_wdt snd_seq_device crc32_pclmul bluetooth mmc_core iTCO_vendor_support joydev cfg80211
[ 88.320602] applesmc ghash_clmulni_intel ecdh_generic snd_pcm input_polldev intel_cstate ecc intel_uncore thunderbolt snd_timer i2c_i801 libarc4 rfkill intel_rapl_perf lpc_ich mei_me pcspkr bcm5974 snd bcma mei soundcore acpi_als sbs kfifo_buf sbshc industrialio apple_bl i915 i2c_algo_bit drm_kms_helper drm uas crc32c_intel usb_storage video hid_apple
[ 88.320630] CR2: 0000000000000018
[ 88.320633] ---[ end trace 933491c8a4fadeb7 ]---
[ 88.320642] RIP: 0010:hidpp_probe+0x61f/0x948 [hid_logitech_hidpp]
[ 88.320645] Code: 81 00 00 48 89 ef e8 f0 d6 ff ff 41 89 c6 85 c0 75 b5 0f b6 44 24 28 48 8b 5d 00 88 44 24 1e 89 44 24 0c 48 8b 83 18 1c 00 00 <48> 8b 48 18 48 8b 83 10 19 00 00 48 8b 40 40 48 89 0c 24 0f b7 80
[ 88.320647] RSP: 0018:ffffb0a6824aba68 EFLAGS: 00010246
[ 88.320650] RAX: 0000000000000000 RBX: ffff93a50756e000 RCX: 0000000000010408
[ 88.320652] RDX: 0000000000000000 RSI: ffff93a51f0ad0a0 RDI: 000000000002d0a0
[ 88.320655] RBP: ffff93a50416da28 R08: ffff93a50416da70 R09: ffff93a50416da70
[ 88.320657] R10: 000000148ae9e60c R11: 00000000000f1525 R12: ffff93a50756e000
[ 88.320659] R13: ffff93a50756f8d0 R14: 0000000000000000 R15: ffff93a50756fc38
[ 88.320662] FS: 00007f8d8c1e0940(0000) GS:ffff93a51f080000(0000) knlGS:0000000000000000
[ 88.320664] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 88.320667] CR2: 0000000000000018 CR3: 00000003996d8003 CR4: 00000000001606e0
To solve this issue:
1. Split g920_get_config() such that all of the device specific
communication remains a part of the function and input subsystem
initialization bits go to hidpp_ff_init()
2. Move call to hidpp_ff_init() from being a part of
g920_get_config() to be the last step of .probe(), right after a
call to hid_hw_start() with connect_mask containing
HID_CONNECT_HIDINPUT.
Fixes: 91cf9a98ae ("HID: logitech-hidpp: make .probe usbhid capable")
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Tested-by: Sam Bazley <sambazley@fastmail.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Henrik Rydberg <rydberg@bitmath.org>
Cc: Pierre-Loup A. Griffais <pgriffais@valvesoftware.com>
Cc: Austin Palmer <austinp@valvesoftware.com>
Cc: linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 5.2+
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
This commit is contained in:
Andrey Smirnov
Benjamin Tissoires
parent
67b18dfb8c
commit
abdd3d0b34
@ -1669,6 +1669,7 @@ static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
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#define HIDPP_FF_EFFECTID_NONE -1
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#define HIDPP_FF_EFFECTID_AUTOCENTER -2
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#define HIDPP_AUTOCENTER_PARAMS_LENGTH 18
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#define HIDPP_FF_MAX_PARAMS 20
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#define HIDPP_FF_RESERVED_SLOTS 1
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@ -2009,7 +2010,7 @@ static int hidpp_ff_erase_effect(struct input_dev *dev, int effect_id)
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static void hidpp_ff_set_autocenter(struct input_dev *dev, u16 magnitude)
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{
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struct hidpp_ff_private_data *data = dev->ff->private;
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u8 params[18];
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u8 params[HIDPP_AUTOCENTER_PARAMS_LENGTH];
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dbg_hid("Setting autocenter to %d.\n", magnitude);
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@ -2081,7 +2082,8 @@ static void hidpp_ff_destroy(struct ff_device *ff)
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kfree(data->effect_ids);
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}
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static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
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static int hidpp_ff_init(struct hidpp_device *hidpp,
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struct hidpp_ff_private_data *data)
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{
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struct hid_device *hid = hidpp->hid_dev;
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struct hid_input *hidinput;
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@ -2089,9 +2091,7 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
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const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
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const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
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struct ff_device *ff;
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struct hidpp_report response;
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struct hidpp_ff_private_data *data;
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int error, j, num_slots;
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int error, j, num_slots = data->num_effects;
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u8 version;
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if (list_empty(&hid->inputs)) {
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@ -2116,27 +2116,17 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
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for (j = 0; hidpp_ff_effects_v2[j] >= 0; j++)
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set_bit(hidpp_ff_effects_v2[j], dev->ffbit);
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/* Read number of slots available in device */
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error = hidpp_send_fap_command_sync(hidpp, feature_index,
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HIDPP_FF_GET_INFO, NULL, 0, &response);
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if (error) {
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if (error < 0)
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return error;
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hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
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__func__, error);
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return -EPROTO;
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}
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num_slots = response.fap.params[0] - HIDPP_FF_RESERVED_SLOTS;
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error = input_ff_create(dev, num_slots);
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if (error) {
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hid_err(dev, "Failed to create FF device!\n");
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return error;
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}
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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/*
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* Create a copy of passed data, so we can transfer memory
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* ownership to FF core
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*/
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data = kmemdup(data, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->effect_ids = kcalloc(num_slots, sizeof(int), GFP_KERNEL);
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@ -2152,10 +2142,7 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
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}
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data->hidpp = hidpp;
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data->feature_index = feature_index;
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data->version = version;
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data->slot_autocenter = 0;
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data->num_effects = num_slots;
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for (j = 0; j < num_slots; j++)
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data->effect_ids[j] = -1;
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@ -2169,37 +2156,14 @@ static int hidpp_ff_init(struct hidpp_device *hidpp, u8 feature_index)
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ff->set_autocenter = hidpp_ff_set_autocenter;
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ff->destroy = hidpp_ff_destroy;
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/* reset all forces */
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error = hidpp_send_fap_command_sync(hidpp, feature_index,
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HIDPP_FF_RESET_ALL, NULL, 0, &response);
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/* Read current Range */
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error = hidpp_send_fap_command_sync(hidpp, feature_index,
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HIDPP_FF_GET_APERTURE, NULL, 0, &response);
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if (error)
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hid_warn(hidpp->hid_dev, "Failed to read range from device!\n");
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data->range = error ? 900 : get_unaligned_be16(&response.fap.params[0]);
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/* Create sysfs interface */
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error = device_create_file(&(hidpp->hid_dev->dev), &dev_attr_range);
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if (error)
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hid_warn(hidpp->hid_dev, "Unable to create sysfs interface for \"range\", errno %d!\n", error);
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/* Read the current gain values */
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error = hidpp_send_fap_command_sync(hidpp, feature_index,
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HIDPP_FF_GET_GLOBAL_GAINS, NULL, 0, &response);
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if (error)
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hid_warn(hidpp->hid_dev, "Failed to read gain values from device!\n");
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data->gain = error ? 0xffff : get_unaligned_be16(&response.fap.params[0]);
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/* ignore boost value at response.fap.params[2] */
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/* init the hardware command queue */
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atomic_set(&data->workqueue_size, 0);
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/* initialize with zero autocenter to get wheel in usable state */
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hidpp_ff_set_autocenter(dev, 0);
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hid_info(hid, "Force feedback support loaded (firmware release %d).\n",
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version);
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@ -2732,24 +2696,93 @@ static int k400_connect(struct hid_device *hdev, bool connected)
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#define HIDPP_PAGE_G920_FORCE_FEEDBACK 0x8123
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static int g920_get_config(struct hidpp_device *hidpp)
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static int g920_ff_set_autocenter(struct hidpp_device *hidpp,
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struct hidpp_ff_private_data *data)
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{
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u8 feature_type;
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u8 feature_index;
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struct hidpp_report response;
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u8 params[HIDPP_AUTOCENTER_PARAMS_LENGTH] = {
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[1] = HIDPP_FF_EFFECT_SPRING | HIDPP_FF_EFFECT_AUTOSTART,
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};
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int ret;
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/* initialize with zero autocenter to get wheel in usable state */
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dbg_hid("Setting autocenter to 0.\n");
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ret = hidpp_send_fap_command_sync(hidpp, data->feature_index,
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HIDPP_FF_DOWNLOAD_EFFECT,
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params, ARRAY_SIZE(params),
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&response);
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if (ret)
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hid_warn(hidpp->hid_dev, "Failed to autocenter device!\n");
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else
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data->slot_autocenter = response.fap.params[0];
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return ret;
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}
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static int g920_get_config(struct hidpp_device *hidpp,
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struct hidpp_ff_private_data *data)
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{
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struct hidpp_report response;
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u8 feature_type;
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int ret;
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memset(data, 0, sizeof(*data));
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/* Find feature and store for later use */
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ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_G920_FORCE_FEEDBACK,
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&feature_index, &feature_type);
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&data->feature_index, &feature_type);
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if (ret)
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return ret;
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ret = hidpp_ff_init(hidpp, feature_index);
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if (ret)
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hid_warn(hidpp->hid_dev, "Unable to initialize force feedback support, errno %d\n",
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ret);
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/* Read number of slots available in device */
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ret = hidpp_send_fap_command_sync(hidpp, data->feature_index,
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HIDPP_FF_GET_INFO,
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NULL, 0,
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&response);
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if (ret) {
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if (ret < 0)
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return ret;
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hid_err(hidpp->hid_dev,
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"%s: received protocol error 0x%02x\n", __func__, ret);
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return -EPROTO;
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}
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return 0;
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data->num_effects = response.fap.params[0] - HIDPP_FF_RESERVED_SLOTS;
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/* reset all forces */
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ret = hidpp_send_fap_command_sync(hidpp, data->feature_index,
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HIDPP_FF_RESET_ALL,
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NULL, 0,
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&response);
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if (ret)
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hid_warn(hidpp->hid_dev, "Failed to reset all forces!\n");
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ret = hidpp_send_fap_command_sync(hidpp, data->feature_index,
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HIDPP_FF_GET_APERTURE,
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NULL, 0,
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&response);
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if (ret) {
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hid_warn(hidpp->hid_dev,
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"Failed to read range from device!\n");
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}
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data->range = ret ?
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900 : get_unaligned_be16(&response.fap.params[0]);
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/* Read the current gain values */
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ret = hidpp_send_fap_command_sync(hidpp, data->feature_index,
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HIDPP_FF_GET_GLOBAL_GAINS,
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NULL, 0,
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&response);
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if (ret)
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hid_warn(hidpp->hid_dev,
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"Failed to read gain values from device!\n");
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data->gain = ret ?
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0xffff : get_unaligned_be16(&response.fap.params[0]);
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/* ignore boost value at response.fap.params[2] */
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return g920_ff_set_autocenter(hidpp, data);
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}
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/* -------------------------------------------------------------------------- */
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@ -3512,6 +3545,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
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int ret;
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bool connected;
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unsigned int connect_mask = HID_CONNECT_DEFAULT;
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struct hidpp_ff_private_data data;
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/* report_fixup needs drvdata to be set before we call hid_parse */
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hidpp = devm_kzalloc(&hdev->dev, sizeof(*hidpp), GFP_KERNEL);
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@ -3621,7 +3655,7 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
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if (ret)
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goto hid_hw_init_fail;
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} else if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_G920)) {
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ret = g920_get_config(hidpp);
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ret = g920_get_config(hidpp, &data);
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if (ret)
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goto hid_hw_init_fail;
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}
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@ -3643,6 +3677,14 @@ static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
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goto hid_hw_start_fail;
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}
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if (hidpp->quirks & HIDPP_QUIRK_CLASS_G920) {
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ret = hidpp_ff_init(hidpp, &data);
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||||
if (ret)
|
||||
hid_warn(hidpp->hid_dev,
|
||||
"Unable to initialize force feedback support, errno %d\n",
|
||||
ret);
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
||||
hid_hw_init_fail:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user