i2c: designware: Optimize flag reading in i2c_dw_read()

Browse source

Optimize the i2c_dw_read() function by reading the message flags only
once per message, rather than for every byte.

The message flags are accessed both in the outer loop and the inner loop,
so move the declaration of the local flags variable to the outer loop.

The message index is only modified by the outer loop, so reading the
flags in the inner loop was always getting the same value.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20251126-i2c-dw-v4-2-b0654598e7c5@bootlin.com

...

This commit is contained in:

Benoît Monin 2025-11-26 11:46:25 +01:00 • committed by Andi Shyti

parent 8f0b4cce44

commit 2b110445b1

No known key found for this signature in database

GPG key ID: DA78056626D32D6E

1 changed files with 2 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

drivers/i2c/busses/i2c-designware-master.c

View file