2024-06-04 18:55:36

by Jason Gunthorpe

[permalink] [raw]
Subject: Re: [PATCH] iommu/arm-smmu-v3: Avoid uninitialized asid in case of error

On Tue, Jun 04, 2024 at 06:52:18PM +0000, Mostafa Saleh wrote:
> Static checker is complaining about the ASID possibly set uninitialized.
> This only happens in case of error and this value would be ignored anyway.
>
> A simple fix would be just to initialize the local variable to zero,
> this path will only be reached on the first attach to a domain where
> the CD is already initialized to zero.
> This avoids having to bloat the function with an error path.
>
> Reported-by: Dan Carpenter <[email protected]>
> Closes:https://lore.kernel.org/linux-iommu/[email protected]/T/#u
> Signed-off-by: Mostafa Saleh <[email protected]>
> ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Thanks this TODO is in my pile of emails :\

Fixes: 04905c17f648 ("iommu/arm-smmu-v3: Build the whole CD in arm_smmu_make_s1_cd()")
Reviewed-by: Jason Gunthorpe <[email protected]>

(mind the missing space 'Closes:')

Jason