On Tue, Aug 7, 2018 at 5:26 AM Mauro Carvalho Chehab
<mchehab+sams...@kernel.org> wrote:
>
> Instead of doing casts, use %zd to print sizes, in order to make
> smatch happier:
> drivers/media/dvb-frontends/drx39xyj/drxj.c:11814 drx_ctrl_u_code()
> warn: argument 4 to %u specifier is cast from pointer
> drivers/media/dvb-frontends/drx39xyj/drxj.c:11845 drx_ctrl_u_code()
> warn: argument 3 to %u specifier is cast from pointer
> drivers/media/dvb-frontends/drx39xyj/drxj.c:11869 drx_ctrl_u_code()
> warn: argument 3 to %u specifier is cast from pointer
> drivers/media/dvb-frontends/drx39xyj/drxj.c:11878 drx_ctrl_u_code()
> warn: argument 3 to %u specifier is cast from pointer
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
> ---
> drivers/media/dvb-frontends/drx39xyj/drxj.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/dvb-frontends/drx39xyj/drxj.c
> b/drivers/media/dvb-frontends/drx39xyj/drxj.c
> index 2948d12d7c14..9628d4067fe1 100644
> --- a/drivers/media/dvb-frontends/drx39xyj/drxj.c
> +++ b/drivers/media/dvb-frontends/drx39xyj/drxj.c
> @@ -11810,8 +11810,8 @@ static int drx_ctrl_u_code(struct drx_demod_instance
> *demod,
> block_hdr.CRC = be16_to_cpu(*(__be16 *)(mc_data));
> mc_data += sizeof(u16);
>
> - pr_debug("%u: addr %u, size %u, flags 0x%04x, CRC 0x%04x\n",
> - (unsigned)(mc_data - mc_data_init), block_hdr.addr,
> + pr_debug("%zd: addr %u, size %u, flags 0x%04x, CRC 0x%04x\n",
> + (mc_data - mc_data_init), block_hdr.addr,
> block_hdr.size, block_hdr.flags, block_hdr.CRC);
>
> /* Check block header on:
> @@ -11841,8 +11841,8 @@ static int drx_ctrl_u_code(struct drx_demod_instance
> *demod,
> mc_block_nr_bytes,
> mc_data, 0x0000)) {
> rc = -EIO;
> - pr_err("error writing firmware at pos %u\n",
> - (unsigned)(mc_data - mc_data_init));
> + pr_err("error writing firmware at pos %zd\n",
> + mc_data - mc_data_init);
> goto release;
> }
> break;
> @@ -11865,8 +11865,8 @@ static int drx_ctrl_u_code(struct drx_demod_instance
> *demod,
> (u16)bytes_to_comp,
> (u8 *)mc_data_buffer,
> 0x0000)) {
> - pr_err("error reading firmware at pos
> %u\n",
> - (unsigned)(mc_data -
> mc_data_init));
> + pr_err("error reading firmware at pos
> %zd\n",
> + mc_data - mc_data_init);
> return -EIO;
> }
>
> @@ -11874,8 +11874,8 @@ static int drx_ctrl_u_code(struct drx_demod_instance
> *demod,
> bytes_to_comp);
>
> if (result) {
> - pr_err("error verifying firmware at
> pos %u\n",
> - (unsigned)(mc_data -
> mc_data_init));
> + pr_err("error verifying firmware at
> pos %zd\n",
> + mc_data - mc_data_init);
> return -EIO;
> }
>
> --
> 2.17.1
>
>From Documentation/printk-formats.txt, it looks like %zd is for
ssize_t, which is what I would expect for pointer subtracting (well
maybe intptr_t, but ssize_t should be word-size-independent).
Reviewed-by: Nick Desaulniers <ndesaulni...@google.com>
--
Thanks,
~Nick Desaulniers
