On Thu, Dec 03, 2020 at 09:47:03PM +0000, Diego Santa Cruz wrote:
> When the "label" property is set on the AT24 EEPROM the NVMEM devid is
> set to NVMEM_DEVID_NONE, but it is not effective since there is a
> leftover line setting it back to NVMEM_DEVID_AUTO a few lines after.
>
> Fixes: 61f764c307f6 ("eeprom: at24: Support custom device names for AT24 EEPROMs")
> Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@xxxxxxxxxxxx>
> ---
> drivers/misc/eeprom/at24.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
> index 35fabaf539b7..fbf69148b5ad 100644
> --- a/drivers/misc/eeprom/at24.c
> +++ b/drivers/misc/eeprom/at24.c
> @@ -704,7 +704,6 @@ static int at24_probe(struct i2c_client *client)
>
> nvmem_config.type = NVMEM_TYPE_EEPROM;
> nvmem_config.dev = dev;
> - nvmem_config.id = NVMEM_DEVID_AUTO;
> nvmem_config.read_only = !writable;
> nvmem_config.root_only = !(flags & AT24_FLAG_IRUGO);
> nvmem_config.owner = THIS_MODULE;
This commit (4e302c3b568eaf2aeebba804c07aba5d921a8c9e) makes a regress
on powerpc64 systems. Tested on YADRO VESNIN (POWER8) and SuperMicro/IBM
9006-22P (POWER9) servers.
The error is logged multiple times in dmesg as following fragment:
[ 5.164711] CPU: 26 PID: 1532 Comm: systemd-udevd Tainted: G W 5.12.0-at24-catch+ #10
[ 5.164714] Call Trace:
[ 5.164715] [c000000052e2f010] [c000000000913610] dump_stack+0xc4/0x114 (unreliable)
[ 5.164721] [c000000052e2f060] [c00000000061bb88] sysfs_warn_dup+0x88/0xc0
[ 5.164726] [c000000052e2f0e0] [c00000000061c2ac] sysfs_do_create_link_sd+0x17c/0x190
[ 5.164730] [c000000052e2f130] [c000000000ac1854] bus_add_device+0x94/0x1d0
[ 5.164735] [c000000052e2f1b0] [c000000000abcff8] device_add+0x428/0xb90
[ 5.164738] [c000000052e2f2a0] [c000000000dea270] nvmem_register+0x220/0xe00
[ 5.164743] [c000000052e2f390] [c000000000deaeac] devm_nvmem_register+0x5c/0xc0
[ 5.164747] [c000000052e2f3d0] [c008000016ca0c1c] at24_probe+0x664/0x8d0 [at24]
[ 5.164753] [c000000052e2f650] [c000000000cfd404] i2c_device_probe+0x194/0x650
[ 5.164757] [c000000052e2f6f0] [c000000000ac357c] really_probe+0x1cc/0x790
[ 5.164761] [c000000052e2f790] [c000000000ac3c9c] driver_probe_device+0x15c/0x200
[ 5.164766] [c000000052e2f810] [c000000000ac470c] device_driver_attach+0x11c/0x130
[ 5.164771] [c000000052e2f850] [c000000000ac4810] __driver_attach+0xf0/0x200
[ 5.164775] [c000000052e2f8d0] [c000000000abf998] bus_for_each_dev+0xa8/0x130
[ 5.164779] [c000000052e2f930] [c000000000ac2944] driver_attach+0x34/0x50
[ 5.164783] [c000000052e2f950] [c000000000ac1e30] bus_add_driver+0x1b0/0x2f0
[ 5.164788] [c000000052e2f9e0] [c000000000ac58f4] driver_register+0xb4/0x1c0
[ 5.164792] [c000000052e2fa50] [c000000000cfcbc8] i2c_register_driver+0x78/0x120
[ 5.164796] [c000000052e2fad0] [c008000016ca11f0] at24_init+0x6c/0x88 [at24]
[ 5.164801] [c000000052e2fb30] [c0000000000122c0] do_one_initcall+0x60/0x2c0
[ 5.164805] [c000000052e2fc00] [c000000000253bdc] do_init_module+0x7c/0x350
[ 5.164809] [c000000052e2fc90] [c000000000257d24] __do_sys_finit_module+0xd4/0x160
[ 5.164813] [c000000052e2fdb0] [c00000000002bfb4] system_call_exception+0xf4/0x200
[ 5.164817] [c000000052e2fe10] [c00000000000cf70] system_call_vectored_common+0xf0/0x268
[ 5.164821] --- interrupt: 3000 at 0x7f35ee3fb4c4
[ 5.164823] NIP: 00007f35ee3fb4c4 LR: 0000000000000000 CTR: 0000000000000000
[ 5.164825] REGS: c000000052e2fe80 TRAP: 3000 Tainted: G W (5.12.0-at24-catch+)
[ 5.164828] MSR: 900000000280f033 <SF,HV,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 44222884 XER: 00000000
[ 5.164842] IRQMASK: 0
GPR00: 0000000000000161 00007ffffbf36390 00007f35ee4e7000 0000000000000006
GPR04: 00007f35ee6ab510 0000000000000000 0000000000000006 0000000000000000
GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
GPR12: 0000000000000000 00007f35ee78e680 0000000020000000 0000000000000000
GPR16: 0000000000000000 00000c0344781980 00000c0344781a18 00000c0344781948
GPR20: 0000000000000000 00000c0350142a20 00007ffffbf365f0 00000c03501b4d90
GPR24: 0000000000000000 00000c0350142a20 0000000000020000 00000c0350139830
GPR28: 00007f35ee6ab510 0000000000020000 0000000000000000 00000c0350142a20
[ 5.164883] NIP [00007f35ee3fb4c4] 0x7f35ee3fb4c4
[ 5.164885] LR [0000000000000000] 0x0
[ 5.164887] --- interrupt: 3000
[ 5.165102] at24: probe of 8-0057 failed with error -17
Reverting the patch solves the issue.
Reported-by: Alexander Fomichev <fomichev.ru@xxxxxxxxx>
CC: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
CC: linux@xxxxxxxxx
--
Regards,
Alexander
