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SubjectRe: [PATCH V3] cacheinfo: Keep the old value if of_property_read_u32 fails
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On Wed, Dec 19, 2018 at 4:15 PM Huacai Chen <chenhc@lemote.com> wrote:
>
> Commit 448a5a552f336bd7b847b1951 ("drivers: base: cacheinfo: use OF
> property_read_u32 instead of get_property,read_number") makes cache
> size and number_of_sets be 0 if DT doesn't provide there values. I
> think this is unreasonable so make them keep the old values, which is
> the same as old kernels.
>
> Fixes: 448a5a552f33 ("drivers: base: cacheinfo: use OF property_read_u32 instead of get_property,read_number")
> Cc: stable@vger.kernel.org
> Signed-off-by: Huacai Chen <chenhc@lemote.com>
> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
> V2: Add Cc and Reviewed-by
> V3: Add ChangeLog
>
> drivers/base/cacheinfo.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
> index cf78fa6..a735953 100644
> --- a/drivers/base/cacheinfo.c
> +++ b/drivers/base/cacheinfo.c
> @@ -79,8 +79,7 @@ static void cache_size(struct cacheinfo *this_leaf, struct device_node *np)
> ct_idx = get_cacheinfo_idx(this_leaf->type);
> propname = cache_type_info[ct_idx].size_prop;
>
> - if (of_property_read_u32(np, propname, &this_leaf->size))
> - this_leaf->size = 0;
> + of_property_read_u32(np, propname, &this_leaf->size);
> }
>
> /* not cache_line_size() because that's a macro in include/linux/cache.h */
> @@ -114,8 +113,7 @@ static void cache_nr_sets(struct cacheinfo *this_leaf, struct device_node *np)
> ct_idx = get_cacheinfo_idx(this_leaf->type);
> propname = cache_type_info[ct_idx].nr_sets_prop;
>
> - if (of_property_read_u32(np, propname, &this_leaf->number_of_sets))
> - this_leaf->number_of_sets = 0;
> + of_property_read_u32(np, propname, &this_leaf->number_of_sets);
> }
>
> static void cache_associativity(struct cacheinfo *this_leaf)
> --
> 2.7.0
>
>
>

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