[PATCH v2 1/3] disk: part: fix partition search boundaries

[Quentin Schulz]

Hi Mikhail,

On 1/19/26 1:36 AM, Mikhail Kshevetskiy wrote:
> GPT disk partition with max available number (ex: /dev/mmcblk128) can't
> be read/write from U-Boot using read/write command. Here is an example:
> 
>    => mmc part
> 
>    Partition Map for mmc device 0  --   Partition Type: EFI
> 
>    Part	Start LBA	End LBA		Name
> 	Attributes
> 	Type GUID
> 	Partition GUID
>    1	0x00001000	0x000013ff	"env1"
> 	attrs:	0x0000000000000000
> 	type:	0fc63daf-8483-4772-8e79-3d69d8477de4
> 	guid:	5452574f-2211-4433-5566-778899aabb02
>    2	0x00001400	0x000017ff	"env2"
> 	attrs:	0x0000000000000000
> 	type:	0fc63daf-8483-4772-8e79-3d69d8477de4
> 	guid:	5452574f-2211-4433-5566-778899aabb03
>    .................
>    8	0x00158000	0x0034bfff	"apps"
> 	attrs:	0x0000000000000000
> 	type:	0fc63daf-8483-4772-8e79-3d69d8477de4
> 	guid:	5452574f-2211-4433-5566-778899aabb09
>    128	0x00000420	0x00000fff	"fip"
> 	attrs:	0x0000000000000000
> 	type:	c12a7328-f81f-11d2-ba4b-00a0c93ec93b
> 	guid:	5452574f-2211-4433-5566-778899aabb01
> 
>    => read mmc 0#fip ${loadaddr} 0 4
>    Could not find "fip" partition
>    ** Bad device specification mmc 0#fip **
>    ** Bad device specification mmc 0#fip **
>    Couldn't find partition mmc 0#fip
> 
> The error is caused by invalid boundary checks. This patch fixes an
> issue.
> 
> Fixes: 43fd4bcefd4e ("disk: part: implement generic function part_get_info_by_uuid()")
> Fixes: 56670d6fb83f ("disk: part: use common api to lookup part driver")
> Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy at iopsys.eu>

Acked-by: Quentin Schulz <quentin.schulz at cherry.de>

Thanks!
Quentin