linux-kernel - [PATCH v2 0/2] hwmon: (dell-smm) Improve ioctl handler

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Date:   Sat, 11 Dec 2021 16:54:20 +0100
From:   Armin Wolf <W_Armin@....de>
To:     pali@...nel.org
Cc:     jdelvare@...e.com, linux@...ck-us.net, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] hwmon: (dell-smm) Improve ioctl handler

This patch series improves the ioctl handler in dell_smm_hwmon.
The first patch is simplifying the ioctl handler by removing
an unnecessary switch case, while the second patch is unifying
both i8k_ioctl() and i8k_ioctl_unlocked(), resulting in better
performance since i8k_mutex is only acquired when needed
(during fan status change) instead of being acquired for
every ioctl call.

Tested on a Dell Inspiron 3505.

changes in v2:
- simplify logic between mutex_lock()/_unlock()
- replace hardcoded values with sizeof statements

Armin Wolf (2):
  hwmon: (dell-smm) Simplify ioctl handler
  hwmon: (dell-smm) Unify i8k_ioctl() and i8k_ioctl_unlocked()

 drivers/hwmon/dell-smm-hwmon.c | 58 +++++++++++-----------------------
 1 file changed, 18 insertions(+), 40 deletions(-)

--
2.30.2