On Tue 10 Apr 15:25 PDT 2018, Alex Elder wrote:
> Cached items are found at the high end of an smem partition. A
> cached item's shared memory precedes the private entry structure
> that describes it.
>
> The address of the structure describing the first cached item should
> be returned by phdr_to_first_cached_entry(). However the function
> calculates the start address using the wrong structure size.
>
> Fix this by computing the first item's entry structure address by
> subtracting the size of a private entry structure rather than a
> partition header structure.
>
> Signed-off-by: Alex Elder <elder@xxxxxxxxxx>
Sorry, I didn't spot these on the mailing list.
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Regards,
Bjorn
> ---
> drivers/soc/qcom/smem.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
> index 0b94d62fad2b..7f38c5e11440 100644
> --- a/drivers/soc/qcom/smem.c
> +++ b/drivers/soc/qcom/smem.c
> @@ -292,8 +292,9 @@ static void *phdr_to_first_cached_entry(struct smem_partition_header *phdr,
> size_t cacheline)
> {
> void *p = phdr;
> + struct smem_private_entry *e;
>
> - return p + le32_to_cpu(phdr->size) - ALIGN(sizeof(*phdr), cacheline);
> + return p + le32_to_cpu(phdr->size) - ALIGN(sizeof(*e), cacheline);
> }
>
> static void *phdr_to_last_cached_entry(struct smem_partition_header *phdr)
> --
> 2.14.1
>
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