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| author | Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2013-08-14 14:23:48 -0700 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2013-08-26 17:22:14 -0700 |
| commit | a5cd98b796b6891edc324415034a7f89531c754f (patch) | |
| tree | 8500c284ce2e175377e8d540657c874786dc6e15 /drivers/leds | |
| parent | af67384f011e81ea86aef8aec51e62e775432ea8 (diff) | |
| download | lwn-a5cd98b796b6891edc324415034a7f89531c754f.tar.gz lwn-a5cd98b796b6891edc324415034a7f89531c754f.zip | |
leds-pca9633: Unique naming of the LEDs
If there is more than one pca963x chips on the system and there are
some LEDs without platform_data names, the driver wont be able to
provide unique naming to them.
This will cause led_class_dev_register to fail, unregistering all the
LEDs of the chip.
This patch adds the i2c address to the name of the unnamed LEDs, making
them unique.
[ 555.346827] ------------[ cut here ]------------
[ 555.346844] WARNING: at /build/linux-voe0Su/linux-3.9.8/fs/sysfs/dir.c:536 sysfs_add_one+0x8b/0x9d()
[ 555.346847] Hardware name: QT5022
[ 555.346850] sysfs: cannot create duplicate filename '/class/leds/pca9633:6'
[ 555.346853] Modules linked in: qt5038_platform(O+) leds_pca9633(O) hid_generic ledtrig_default_on rfcomm bnep bluetooth binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc nls_utf8 nls_cp437 vfat fat loop fuse joydev hid_multitouch usbhid hid acpi_cpufreq mperf kvm_amd kvm evdev pn533 nfc arc4 microcode pcspkr efivars k10temp ath9k ath9k_common ath9k_hw ath fglrx(PO) mac80211 cfg80211 video rfkill processor thermal_sys sp5100_tco button i2c_piix4 ext4 crc16 jbd2 mbcache sg sd_mod crc_t10dif ahci libahci igb i2c_algo_bit i2c_core dca ptp pps_core ehci_pci ohci_hcd ehci_hcd libata usbcore usb_common scsi_mod [last unloaded: leds_pca963x]
[ 555.346940] Pid: 4766, comm: insmod Tainted: P W O 3.9-1-amd64 #1 Debian 3.9.8-1
[ 555.346943] Call Trace:
[ 555.346956] [<ffffffff8103d153>] ? warn_slowpath_common+0x76/0x8c
[ 555.346962] [<ffffffff8103d202>] ? warn_slowpath_fmt+0x47/0x49
[ 555.346968] [<ffffffff8116005d>] ? sysfs_pathname+0x3b/0x41
[ 555.346973] [<ffffffff81160767>] ? sysfs_add_one+0x8b/0x9d
[ 555.346978] [<ffffffff811610a4>] ? sysfs_do_create_link_sd+0xe8/0x174
[ 555.346985] [<ffffffff81279250>] ? device_add+0x243/0x5ab
[ 555.346991] [<ffffffff81060a16>] ? complete_all+0x31/0x40
[ 555.346998] [<ffffffff8104991a>] ? init_timer_key+0xc/0x56
[ 555.347004] [<ffffffff8127964c>] ? device_create_vargs+0x82/0xb6
[ 555.347009] [<ffffffff812796af>] ? device_create+0x2f/0x31
[ 555.347014] [<ffffffff81060add>] ? should_resched+0x5/0x23
[ 555.347021] [<ffffffff812a3a92>] ? led_classdev_register+0x24/0x103
[ 555.347028] [<ffffffffa09d01c0>] ? pca9633_probe+0x173/0x239 [leds_pca9633]
[ 555.347035] [<ffffffff8127b504>] ? __driver_attach+0x73/0x73
[ 555.347049] [<ffffffffa009dfc9>] ? i2c_device_probe+0x63/0x88 [i2c_core]
[ 555.347057] [<ffffffff8127b373>] ? driver_probe_device+0x92/0x1b0
[ 555.347064] [<ffffffff81279c5c>] ? bus_for_each_drv+0x43/0x7d
[ 555.347070] [<ffffffff8127b2af>] ? device_attach+0x68/0x83
[ 555.347078] [<ffffffff8127a990>] ? bus_probe_device+0x25/0x8d
[ 555.347083] [<ffffffff812793f7>] ? device_add+0x3ea/0x5ab
[ 555.347088] [<ffffffff81060a16>] ? complete_all+0x31/0x40
[ 555.347094] [<ffffffff8104991a>] ? init_timer_key+0xc/0x56
[ 555.347104] [<ffffffffa009d3a1>] ? i2c_new_device+0x10d/0x179 [i2c_core]
[ 555.347112] [<ffffffffa008f036>] ? qt5038_init+0x36/0x1000 [qt5038_platform]
[ 555.347119] [<ffffffffa008f000>] ? 0xffffffffa008efff
[ 555.347125] [<ffffffff8100209e>] ? do_one_initcall+0x74/0x128
[ 555.347131] [<ffffffffa008f000>] ? 0xffffffffa008efff
[ 555.347137] [<ffffffff810836f5>] ? load_module+0x1af7/0x1dfc
[ 555.347144] [<ffffffff810801c5>] ? free_notes_attrs+0x3c/0x3c
[ 555.347150] [<ffffffff81083a98>] ? sys_init_module+0x9e/0xab
[ 555.347157] [<ffffffff8138be29>] ? system_call_fastpath+0x16/0x1b
[ 555.347161] ---[ end trace ad00b85794e0de4d ]---
[ 555.347448] leds-pca9633: probe of 0-006b failed with error -17
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-pca9633.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c index e59ca0a1d189..7dd48f896d4e 100644 --- a/drivers/leds/leds-pca9633.c +++ b/drivers/leds/leds-pca9633.c @@ -362,10 +362,12 @@ static int pca9633_probe(struct i2c_client *client, if (pdata->leds.leds[i].default_trigger) pca9633[i].led_cdev.default_trigger = pdata->leds.leds[i].default_trigger; - } else { - snprintf(pca9633[i].name, sizeof(pca9633[i].name), - "pca9633:%d", i); } + if (!pdata || i >= pdata->leds.num_leds || + !pdata->leds.leds[i].name) + snprintf(pca9633[i].name, sizeof(pca9633[i].name), + "pca9633:%d:%.2x:%d", client->adapter->nr, + client->addr, i); pca9633[i].led_cdev.name = pca9633[i].name; pca9633[i].led_cdev.brightness_set = pca9633_led_set; |