Messages in this thread | | | Subject | Re: [PATCH] firmware: arm_scmi: Use {get,put}_unaligned_le32 accessors | From | Philipp Zabel <> | Date | Wed, 07 Aug 2019 15:36:11 +0200 |
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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 <p.zabel@pengutronix.de> > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> > --- > 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.
regards Philipp
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