On Wed, Aug 07, 2019 at 03:36:11PM +0200, Philipp Zabel wrote:
> Hi Sudeep,
>
> On Wed, 2019-08-07 at 14:00 +0100, Sudeep Holla wrote:
> > Instead of type-casting the {tx,rx}.buf all over the place while
> > accessing them to read/write __le32 from/to the firmware, let's use
> > the nice existing {get,put}_unaligned_le32 accessors to hide all the
> > type cast ugliness.
> >
> > Suggested-by: Philipp Zabel <[email protected]>
> > Signed-off-by: Sudeep Holla <[email protected]>
> > ---
> > drivers/firmware/arm_scmi/base.c | 2 +-
> > drivers/firmware/arm_scmi/clock.c | 10 ++++------
> > drivers/firmware/arm_scmi/common.h | 2 ++
> > drivers/firmware/arm_scmi/perf.c | 8 ++++----
> > drivers/firmware/arm_scmi/power.c | 6 +++---
> > drivers/firmware/arm_scmi/reset.c | 2 +-
> > drivers/firmware/arm_scmi/sensors.c | 12 +++++-------
> > 7 files changed, 20 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/firmware/arm_scmi/base.c
> > b/drivers/firmware/arm_scmi/base.c
> > index 204390297f4b..f804e8af6521 100644
> > --- a/drivers/firmware/arm_scmi/base.c
> > +++ b/drivers/firmware/arm_scmi/base.c
> [...]
> > @@ -204,14 +204,12 @@ scmi_clock_rate_get(const struct scmi_handle *handle,
> > u32 clk_id, u64 *value)
> > if (ret)
> > return ret;
> >
> > - *(__le32 *)t->tx.buf = cpu_to_le32(clk_id);
> > + put_unaligned_le32(clk_id, t->tx.buf);
> >
> > ret = scmi_do_xfer(handle, t);
> > if (!ret) {
> > - __le32 *pval = t->rx.buf;
> > -
> > - *value = le32_to_cpu(*pval);
> > - *value |= (u64)le32_to_cpu(*(pval + 1)) << 32;
> > + *value = get_unaligned_le32(t->rx.buf);
> > + *value |= (u64)get_unaligned_le32(t->rx.buf + 1) << 32;
>
> Isn't t->rx.buf a void pointer? If I am not mistaken, you'd either have
> to keep the pval local variables, or cast to (__le32 *) before doing
> pointer arithmetic.
>
Ah right, that's the reason I added it at the first place. I will fix that.
--
Regards,
Sudeep
