Re: [PATCH v3 2/2] drivers/mtd: Fix device registration error
On 2/13/19 6:58 PM, Boris Brezillon wrote: Subject prefix should be "mtd: powernv_flash: " On Mon, 11 Feb 2019 19:03:38 +0530 "Aneesh Kumar K.V" wrote: 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: [c000b38e3220] [c0b58fe4] dump_stack+0xe8/0x164 (unreliable) [c000b38e3270] [c04cf074] sysfs_warn_dup+0x84/0xb0 [c000b38e32f0] [c04cf6c4] sysfs_do_create_link_sd.isra.0+0x114/0x150 [c000b38e3340] [c0726a84] bus_add_device+0x94/0x1e0 [c000b38e33c0] [c07218f0] device_add+0x4d0/0x830 [c000b38e3480] [c09d54a8] nvmem_register.part.2+0x1c8/0xb30 [c000b38e3560] [c0834530] mtd_nvmem_add+0x90/0x120 [c000b38e3650] [c0835bc8] add_mtd_device+0x198/0x4e0 [c000b38e36f0] [c083619c] mtd_device_parse_register+0x11c/0x280 [c000b38e3780] [c0840830] powernv_flash_probe+0x180/0x250 [c000b38e3820] [c072c120] platform_drv_probe+0x60/0xf0 [c000b38e38a0] [c07283c8] really_probe+0x138/0x4d0 [c000b38e3930] [c0728acc] driver_probe_device+0x13c/0x1b0 [c000b38e39b0] [c0728c7c] __driver_attach+0x13c/0x1c0 [c000b38e3a30] [c0725130] bus_for_each_dev+0xa0/0x120 [c000b38e3a90] [c0727b2c] driver_attach+0x2c/0x40 [c000b38e3ab0] [c07270f8] bus_add_driver+0x228/0x360 [c000b38e3b40] [c072a2e0] driver_register+0x90/0x1a0 [c000b38e3bb0] [c072c020] __platform_driver_register+0x50/0x70 [c000b38e3bd0] [c105c984] powernv_flash_driver_init+0x24/0x38 [c000b38e3bf0] [c0010904] do_one_initcall+0x84/0x464 [c000b38e3cd0] [c1004548] kernel_init_freeable+0x530/0x634 [c000b38e3db0] [c0011154] kernel_init+0x1c/0x168 [c000b38e3e20] [c000bed4] 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: acfe63ec1c59 ("mtd: Convert to using %pOFn instead of device_node.name") Actually it's not this commit that is at fault as mtd->name was already given the value of device_node->name before that. I think you're actually fixing 1cbb4a1c433a ("mtd: powernv: Add powernv flash MTD abstraction driver"). No need to send a new version, I can fix that when applying, just let me know if you're okay with the changes I suggested. The suggested changes looks good. Thanks -aneesh
Re: [PATCH v3 2/2] drivers/mtd: Fix device registration error
Subject prefix should be "mtd: powernv_flash: " On Mon, 11 Feb 2019 19:03:38 +0530 "Aneesh Kumar K.V" wrote: > 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: > [c000b38e3220] [c0b58fe4] dump_stack+0xe8/0x164 (unreliable) > [c000b38e3270] [c04cf074] sysfs_warn_dup+0x84/0xb0 > [c000b38e32f0] [c04cf6c4] > sysfs_do_create_link_sd.isra.0+0x114/0x150 > [c000b38e3340] [c0726a84] bus_add_device+0x94/0x1e0 > [c000b38e33c0] [c07218f0] device_add+0x4d0/0x830 > [c000b38e3480] [c09d54a8] nvmem_register.part.2+0x1c8/0xb30 > [c000b38e3560] [c0834530] mtd_nvmem_add+0x90/0x120 > [c000b38e3650] [c0835bc8] add_mtd_device+0x198/0x4e0 > [c000b38e36f0] [c083619c] mtd_device_parse_register+0x11c/0x280 > [c000b38e3780] [c0840830] powernv_flash_probe+0x180/0x250 > [c000b38e3820] [c072c120] platform_drv_probe+0x60/0xf0 > [c000b38e38a0] [c07283c8] really_probe+0x138/0x4d0 > [c000b38e3930] [c0728acc] driver_probe_device+0x13c/0x1b0 > [c000b38e39b0] [c0728c7c] __driver_attach+0x13c/0x1c0 > [c000b38e3a30] [c0725130] bus_for_each_dev+0xa0/0x120 > [c000b38e3a90] [c0727b2c] driver_attach+0x2c/0x40 > [c000b38e3ab0] [c07270f8] bus_add_driver+0x228/0x360 > [c000b38e3b40] [c072a2e0] driver_register+0x90/0x1a0 > [c000b38e3bb0] [c072c020] __platform_driver_register+0x50/0x70 > [c000b38e3bd0] [c105c984] powernv_flash_driver_init+0x24/0x38 > [c000b38e3bf0] [c0010904] do_one_initcall+0x84/0x464 > [c000b38e3cd0] [c1004548] kernel_init_freeable+0x530/0x634 > [c000b38e3db0] [c0011154] kernel_init+0x1c/0x168 > [c000b38e3e20] [c000bed4] 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: acfe63ec1c59 ("mtd: Convert to using %pOFn instead of > device_node.name") Actually it's not this commit that is at fault as mtd->name was already given the value of device_node->name before that. I think you're actually fixing 1cbb4a1c433a ("mtd: powernv: Add powernv flash MTD abstraction driver"). No need to send a new version, I can fix that when applying, just let me know if you're okay with the changes I suggested. > Signed-off-by: Aneesh Kumar K.V > --- > drivers/mtd/devices/powernv_flash.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/mtd/devices/powernv_flash.c > b/drivers/mtd/devices/powernv_flash.c > index 22f753e555ac..83f88b8b5d9f 100644 > --- a/drivers/mtd/devices/powernv_flash.c > +++ b/drivers/mtd/devices/powernv_flash.c > @@ -212,7 +212,7 @@ static int powernv_flash_set_driver_info(struct device > *dev, >* Going to have to check what details I need to set and how to >* get them >*/ > - mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); > + mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node); > mtd->type = MTD_NORFLASH; > mtd->flags = MTD_WRITEABLE; > mtd->size = size;
[PATCH v3 2/2] drivers/mtd: 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: [c000b38e3220] [c0b58fe4] dump_stack+0xe8/0x164 (unreliable) [c000b38e3270] [c04cf074] sysfs_warn_dup+0x84/0xb0 [c000b38e32f0] [c04cf6c4] sysfs_do_create_link_sd.isra.0+0x114/0x150 [c000b38e3340] [c0726a84] bus_add_device+0x94/0x1e0 [c000b38e33c0] [c07218f0] device_add+0x4d0/0x830 [c000b38e3480] [c09d54a8] nvmem_register.part.2+0x1c8/0xb30 [c000b38e3560] [c0834530] mtd_nvmem_add+0x90/0x120 [c000b38e3650] [c0835bc8] add_mtd_device+0x198/0x4e0 [c000b38e36f0] [c083619c] mtd_device_parse_register+0x11c/0x280 [c000b38e3780] [c0840830] powernv_flash_probe+0x180/0x250 [c000b38e3820] [c072c120] platform_drv_probe+0x60/0xf0 [c000b38e38a0] [c07283c8] really_probe+0x138/0x4d0 [c000b38e3930] [c0728acc] driver_probe_device+0x13c/0x1b0 [c000b38e39b0] [c0728c7c] __driver_attach+0x13c/0x1c0 [c000b38e3a30] [c0725130] bus_for_each_dev+0xa0/0x120 [c000b38e3a90] [c0727b2c] driver_attach+0x2c/0x40 [c000b38e3ab0] [c07270f8] bus_add_driver+0x228/0x360 [c000b38e3b40] [c072a2e0] driver_register+0x90/0x1a0 [c000b38e3bb0] [c072c020] __platform_driver_register+0x50/0x70 [c000b38e3bd0] [c105c984] powernv_flash_driver_init+0x24/0x38 [c000b38e3bf0] [c0010904] do_one_initcall+0x84/0x464 [c000b38e3cd0] [c1004548] kernel_init_freeable+0x530/0x634 [c000b38e3db0] [c0011154] kernel_init+0x1c/0x168 [c000b38e3e20] [c000bed4] 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: acfe63ec1c59 ("mtd: Convert to using %pOFn instead of device_node.name") Signed-off-by: Aneesh Kumar K.V --- drivers/mtd/devices/powernv_flash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index 22f753e555ac..83f88b8b5d9f 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -212,7 +212,7 @@ static int powernv_flash_set_driver_info(struct device *dev, * Going to have to check what details I need to set and how to * get them */ - mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); + mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node); mtd->type = MTD_NORFLASH; mtd->flags = MTD_WRITEABLE; mtd->size = size; -- 2.20.1
[PATCH v3 2/2] drivers/mtd: 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: [c000b38e3220] [c0b58fe4] dump_stack+0xe8/0x164 (unreliable) [c000b38e3270] [c04cf074] sysfs_warn_dup+0x84/0xb0 [c000b38e32f0] [c04cf6c4] sysfs_do_create_link_sd.isra.0+0x114/0x150 [c000b38e3340] [c0726a84] bus_add_device+0x94/0x1e0 [c000b38e33c0] [c07218f0] device_add+0x4d0/0x830 [c000b38e3480] [c09d54a8] nvmem_register.part.2+0x1c8/0xb30 [c000b38e3560] [c0834530] mtd_nvmem_add+0x90/0x120 [c000b38e3650] [c0835bc8] add_mtd_device+0x198/0x4e0 [c000b38e36f0] [c083619c] mtd_device_parse_register+0x11c/0x280 [c000b38e3780] [c0840830] powernv_flash_probe+0x180/0x250 [c000b38e3820] [c072c120] platform_drv_probe+0x60/0xf0 [c000b38e38a0] [c07283c8] really_probe+0x138/0x4d0 [c000b38e3930] [c0728acc] driver_probe_device+0x13c/0x1b0 [c000b38e39b0] [c0728c7c] __driver_attach+0x13c/0x1c0 [c000b38e3a30] [c0725130] bus_for_each_dev+0xa0/0x120 [c000b38e3a90] [c0727b2c] driver_attach+0x2c/0x40 [c000b38e3ab0] [c07270f8] bus_add_driver+0x228/0x360 [c000b38e3b40] [c072a2e0] driver_register+0x90/0x1a0 [c000b38e3bb0] [c072c020] __platform_driver_register+0x50/0x70 [c000b38e3bd0] [c105c984] powernv_flash_driver_init+0x24/0x38 [c000b38e3bf0] [c0010904] do_one_initcall+0x84/0x464 [c000b38e3cd0] [c1004548] kernel_init_freeable+0x530/0x634 [c000b38e3db0] [c0011154] kernel_init+0x1c/0x168 [c000b38e3e20] [c000bed4] 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: acfe63ec1c59 ("mtd: Convert to using %pOFn instead of device_node.name") Signed-off-by: Aneesh Kumar K.V --- drivers/mtd/devices/powernv_flash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index 22f753e555ac..83f88b8b5d9f 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -212,7 +212,7 @@ static int powernv_flash_set_driver_info(struct device *dev, * Going to have to check what details I need to set and how to * get them */ - mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); + mtd->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFP", dev->of_node); mtd->type = MTD_NORFLASH; mtd->flags = MTD_WRITEABLE; mtd->size = size; -- 2.20.1