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linux_dsm_epyc7002/drivers/mtd/devices
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Aneesh Kumar K.V 3e35730dd7 mtd: powernv_flash: Fix device registration error 
This change helps me to get multiple mtd device registered. Without this
I get

sysfs: cannot create duplicate filename '/bus/nvmem/devices/flash0'
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.0.0-rc2-00557-g1ef20ef21f22 #13
Call Trace:
[c0000000b38e3220] [c000000000b58fe4] dump_stack+0xe8/0x164 (unreliable)
[c0000000b38e3270] [c0000000004cf074] sysfs_warn_dup+0x84/0xb0
[c0000000b38e32f0] [c0000000004cf6c4] sysfs_do_create_link_sd.isra.0+0x114/0x150
[c0000000b38e3340] [c000000000726a84] bus_add_device+0x94/0x1e0
[c0000000b38e33c0] [c0000000007218f0] device_add+0x4d0/0x830
[c0000000b38e3480] [c0000000009d54a8] nvmem_register.part.2+0x1c8/0xb30
[c0000000b38e3560] [c000000000834530] mtd_nvmem_add+0x90/0x120
[c0000000b38e3650] [c000000000835bc8] add_mtd_device+0x198/0x4e0
[c0000000b38e36f0] [c00000000083619c] mtd_device_parse_register+0x11c/0x280
[c0000000b38e3780] [c000000000840830] powernv_flash_probe+0x180/0x250
[c0000000b38e3820] [c00000000072c120] platform_drv_probe+0x60/0xf0
[c0000000b38e38a0] [c0000000007283c8] really_probe+0x138/0x4d0
[c0000000b38e3930] [c000000000728acc] driver_probe_device+0x13c/0x1b0
[c0000000b38e39b0] [c000000000728c7c] __driver_attach+0x13c/0x1c0
[c0000000b38e3a30] [c000000000725130] bus_for_each_dev+0xa0/0x120
[c0000000b38e3a90] [c000000000727b2c] driver_attach+0x2c/0x40
[c0000000b38e3ab0] [c0000000007270f8] bus_add_driver+0x228/0x360
[c0000000b38e3b40] [c00000000072a2e0] driver_register+0x90/0x1a0
[c0000000b38e3bb0] [c00000000072c020] __platform_driver_register+0x50/0x70
[c0000000b38e3bd0] [c00000000105c984] powernv_flash_driver_init+0x24/0x38
[c0000000b38e3bf0] [c000000000010904] do_one_initcall+0x84/0x464
[c0000000b38e3cd0] [c000000001004548] kernel_init_freeable+0x530/0x634
[c0000000b38e3db0] [c000000000011154] kernel_init+0x1c/0x168
[c0000000b38e3e20] [c00000000000bed4] ret_from_kernel_thread+0x5c/0x68
mtd mtd1: Failed to register NVMEM device

With the change we now have

root@(none):/sys/bus/nvmem/devices# ls -al
total 0
drwxr-xr-x 2 root root 0 Feb  6 20:49 .
drwxr-xr-x 4 root root 0 Feb  6 20:49 ..
lrwxrwxrwx 1 root root 0 Feb  6 20:49 flash@0 -> ../../../devices/platform/ibm,opal:flash@0/mtd/mtd0/flash@0
lrwxrwxrwx 1 root root 0 Feb  6 20:49 flash@1 -> ../../../devices/platform/ibm,opal:flash@1/mtd/mtd1/flash@1

Fixes: 1cbb4a1c43 ("mtd: powernv: Add powernv flash MTD abstraction driver")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
2019-02-13 14:19:40 +01:00
..
bcm47xxsflash.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
bcm47xxsflash.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
block2mtd.c mtd: block2mtd: mark expected switch fall-throughs 2018-11-09 20:32:43 +01:00
docg3.c mtd: use DEFINE_SHOW_ATTRIBUTE() instead of open-coding it 2018-12-03 11:32:26 +01:00
docg3.h mtd: use DEFINE_SHOW_ATTRIBUTE() instead of open-coding it 2018-12-03 11:32:26 +01:00
Kconfig mtd: docg3: don't set conflicting BCH_CONST_PARAMS option 2018-11-05 09:20:37 +01:00
lart.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
m25p80.c SPI NOR changes: 2018-10-23 01:09:22 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mchp23k256.c mtd: mchp23k256: propagate return value of spi_sync() 2017-12-17 09:10:14 +01:00
ms02-nv.c mtd: ms02-nv: remove superfluous name cast 2014-01-03 11:22:09 -08:00
ms02-nv.h MTD/JFFS2: remove CVS keywords 2008-06-04 17:50:17 +01:00
mtd_dataflash.c mtd: dataflash: Use ULL suffix for 64-bit constants 2018-06-22 10:32:28 +02:00
mtdram.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
phram.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
pmc551.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
powernv_flash.c mtd: powernv_flash: Fix device registration error 2019-02-13 14:19:40 +01:00
serial_flash_cmds.h mtd: st_spi_fsm: remove SPINOR_OP_RDSR2 and use SPINOR_OP_RDCR instead 2017-06-27 21:50:17 +02:00
slram.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
spear_smi.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00
sst25l.c mtd: sst25l: use mtd_device_register() 2018-07-18 16:32:38 +02:00
st_spi_fsm.c mtd: Stop updating erase_info->state and calling mtd_erase_callback() 2018-03-21 09:50:56 +01:00