On 05/29/2016 07:06 PM, Jonathan Cameron wrote: > On 25/05/16 11:34, Daniel Baluta wrote: >> On Tue, May 24, 2016 at 10:16 PM, Alison Schofield <[email protected]> >> wrote: >>> Driver was checking for direct mode and trying to lock it, but >>> left a gap where mode could change before the desired operation. >>> Use iio_device_claim_direct_mode() to guarantee device stays in >>> direct mode. >>> >>> Signed-off-by: Alison Schofield <[email protected]> >>> Cc: Daniel Baluta <[email protected]> >> >> Looks good to me. We could use an Acked-by from Lars here. >> >> Acked-by: Daniel Baluta <[email protected]> > This one is a little more interesting. I wonder if we wouldn't be better > off taking the lock for the whole function rather than dropping it for > short periods.
It will only be locked once. sysfs_streq() will only match for a single item. But you are right the code could be refactored to make that more clearer. First run the lookup look and then apply afterwards.
