diff mbox series

[v2,1/4] mtd: core: provide unique name for nvmem device, take two

Message ID 20230308082021.870459-1-michael@walle.cc
State New
Headers
Series [v2,1/4] mtd: core: provide unique name for nvmem device, take two |

Commit Message

Michael Walle March 8, 2023, 8:20 a.m. UTC 
  Commit c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
tries to give the nvmem device a unique name, but fails badly if the mtd
device doesn't have a "struct device" associated with it, i.e. if
CONFIG_MTD_PARTITIONED_MASTER is not set. This will result in the name
"(null)-user-otp", which is not unique. It seems the best we can do is
to use the compatible name together with a unique identifier added by
the nvmem subsystem by using NVMEM_DEVID_AUTO.

Fixes: c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Walle <michael@walle.cc>
---
v2:
 - actually use NVMEM_DEVID_AUTO as described in the commit message

 drivers/mtd/mtdcore.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

Comments

Miquel Raynal March 8, 2023, 1:40 p.m. UTC | #1 
Hi Michael,

michael@walle.cc wrote on Wed,  8 Mar 2023 09:20:18 +0100:

> Commit c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
> tries to give the nvmem device a unique name, but fails badly if the mtd
> device doesn't have a "struct device" associated with it, i.e. if
> CONFIG_MTD_PARTITIONED_MASTER is not set. This will result in the name
> "(null)-user-otp", which is not unique. It seems the best we can do is
> to use the compatible name together with a unique identifier added by
> the nvmem subsystem by using NVMEM_DEVID_AUTO.
> 
> Fixes: c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
> Cc: stable@vger.kernel.org
> Signed-off-by: Michael Walle <michael@walle.cc>
> ---
> v2:
>  - actually use NVMEM_DEVID_AUTO as described in the commit message
> 

Thanks for the v2, as I want to share a clean immutable branch with
Greg, I made an exception in force pushing this patch in place of its
v1 counterpart.

>  drivers/mtd/mtdcore.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index 0feacb9fbdac..8fc66cda4a09 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -888,8 +888,8 @@ static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,
>  
>  	/* OTP nvmem will be registered on the physical device */
>  	config.dev = mtd->dev.parent;
> -	config.name = kasprintf(GFP_KERNEL, "%s-%s", dev_name(&mtd->dev), compatible);
> -	config.id = NVMEM_DEVID_NONE;
> +	config.name = compatible;
> +	config.id = NVMEM_DEVID_AUTO;
>  	config.owner = THIS_MODULE;
>  	config.type = NVMEM_TYPE_OTP;
>  	config.root_only = true;
> @@ -905,7 +905,6 @@ static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,
>  		nvmem = NULL;
>  
>  	of_node_put(np);
> -	kfree(config.name);
>  
>  	return nvmem;
>  }


Thanks,
Miquèl
diff mbox series

Patch

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 0feacb9fbdac..8fc66cda4a09 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -888,8 +888,8 @@  static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,
 
 	/* OTP nvmem will be registered on the physical device */
 	config.dev = mtd->dev.parent;
-	config.name = kasprintf(GFP_KERNEL, "%s-%s", dev_name(&mtd->dev), compatible);
-	config.id = NVMEM_DEVID_NONE;
+	config.name = compatible;
+	config.id = NVMEM_DEVID_AUTO;
 	config.owner = THIS_MODULE;
 	config.type = NVMEM_TYPE_OTP;
 	config.root_only = true;
@@ -905,7 +905,6 @@  static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,
 		nvmem = NULL;
 
 	of_node_put(np);
-	kfree(config.name);
 
 	return nvmem;
 }