[PATCH 19/21] treewide: add checks for the return value of memblock_alloc*()

[Paul Burton]

Hi Mike,

On Wed, Jan 16, 2019 at 03:44:19PM +0200, Mike Rapoport wrote:
> Add check for the return value of memblock_alloc*() functions and call
> panic() in case of error.
> The panic message repeats the one used by panicing memblock allocators with
> adjustment of parameters to include only relevant ones.
> 
> The replacement was mostly automated with semantic patches like the one
> below with manual massaging of format strings.
> 
> @@
> expression ptr, size, align;
> @@
> ptr = memblock_alloc(size, align);
> + if (!ptr)
> + 	panic("%s: Failed to allocate %lu bytes align=0x%lx\n", __func__,
> size, align);
> 
> Signed-off-by: Mike Rapoport <rppt at linux.ibm.com>
> ---
>%
> diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
> index e8eb60e..db1deb2 100644
> --- a/arch/mips/cavium-octeon/dma-octeon.c
> +++ b/arch/mips/cavium-octeon/dma-octeon.c
> @@ -245,6 +245,9 @@ void __init plat_swiotlb_setup(void)
>  	swiotlbsize = swiotlb_nslabs << IO_TLB_SHIFT;
>  
>  	octeon_swiotlb = memblock_alloc_low(swiotlbsize, PAGE_SIZE);
> +	if (!octeon_swiotlb)
> +		panic("%s: Failed to allocate %lu bytes align=%lx\n",
> +		      __func__, swiotlbsize, PAGE_SIZE);
>  
>  	if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM)
>  		panic("Cannot allocate SWIOTLB buffer");

That one should be %zu rather than %lu. The rest looks good, so with
that one tweak:

    Acked-by: Paul Burton <paul.burton at mips.com> # MIPS parts

Thanks,
    Paul