Re: [PATCH] remoteproc: qcom: pil-info: Fix shift overflow

[Nathan Chancellor]

On Wed, Jul 15, 2020 at 10:48:17PM -0700, Bjorn Andersson wrote:
> On platforms with 32-bit phys_addr_t the shift to get the upper word of
> the base address of the memory region is invalid. Cast the base to 64
> bit to resolv this.
> 
> Fixes: 549b67da660d ("remoteproc: qcom: Introduce helper to store pil info in IMEM")
> Reported-by: Lee Jones <lee.jones@xxxxxxxxxx>
> Reported-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>

Tested-by: Nathan Chancellor <natechancellor@xxxxxxxxx> # build

> ---
>  drivers/remoteproc/qcom_pil_info.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/qcom_pil_info.c b/drivers/remoteproc/qcom_pil_info.c
> index 0536e3904669..5521c4437ffa 100644
> --- a/drivers/remoteproc/qcom_pil_info.c
> +++ b/drivers/remoteproc/qcom_pil_info.c
> @@ -108,7 +108,7 @@ int qcom_pil_info_store(const char *image, phys_addr_t base, size_t size)
>  found_existing:
>  	/* Use two writel() as base is only aligned to 4 bytes on odd entries */
>  	writel(base, entry + PIL_RELOC_NAME_LEN);
> -	writel(base >> 32, entry + PIL_RELOC_NAME_LEN + 4);
> +	writel((u64)base >> 32, entry + PIL_RELOC_NAME_LEN + 4);
>  	writel(size, entry + PIL_RELOC_NAME_LEN + sizeof(__le64));
>  	mutex_unlock(&pil_reloc_lock);
>  
> -- 
> 2.26.2
>