Thread (21 messages) 21 messages, 4 authors, 2021-12-22

Re: [PATCH v10 03/14] iio: inkern: make a best effort on offset calculation

From: Liam Beguin <hidden>
Date: 2021-12-21 17:50:26
Also in: linux-iio, lkml

Hi Andy,

On Tue, Dec 21, 2021 at 07:42:31AM +0200, Andy Shevchenko wrote:
On Mon, Dec 20, 2021 at 11:17 AM Liam Beguin [off-list ref] wrote:
quoted
From: Liam Beguin <redacted>

iio_convert_raw_to_processed_unlocked() assumes the offset is an
integer. Make a best effort to get a valid offset value for fractional
cases without breaking implicit truncations.
...
quoted
+                       offset_val /= (1 << offset_val2);
Besides potentially being problematic (if arg is 31 for the left
shift) why not simply

_val >>= _val2;
That is safer, and more elegant! I'll update.

Thanks,
Liam
--
With Best Regards,
Andy Shevchenko
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