From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752301AbcFFIyl (ORCPT ); Mon, 6 Jun 2016 04:54:41 -0400 Received: from mail-wm0-f48.google.com ([74.125.82.48]:38497 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751291AbcFFItL (ORCPT ); Mon, 6 Jun 2016 04:49:11 -0400 From: Bartosz Golaszewski To: Wolfram Sang , linux-i2c , LKML , Andrew Lunn , Srinivas Kandagatla , Maxime Ripard , GregKH Cc: Bartosz Golaszewski Subject: [RESEND PATCH 04/14] eeprom: at24: call read/write functions via function pointers Date: Mon, 6 Jun 2016 10:48:46 +0200 Message-Id: <1465202936-16832-5-git-send-email-bgolaszewski@baylibre.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1465202936-16832-1-git-send-email-bgolaszewski@baylibre.com> References: <1465202936-16832-1-git-send-email-bgolaszewski@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The first step in simplifying the read and write functions is to call them via function pointers stored in at24_data. When we eventually split the routines into smaller ones (depending on whether they use smbus or i2c operations) we'll simply assign them to said pointers instead of checking the flags at runtime every time we read/write. Signed-off-by: Bartosz Golaszewski --- drivers/misc/eeprom/at24.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 564a201..0621937 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -58,6 +58,10 @@ struct at24_data { int use_smbus; int use_smbus_write; + ssize_t (*read_func)(struct at24_data *, char *, unsigned int, size_t); + ssize_t (*write_func)(struct at24_data *, + const char *, unsigned int, size_t); + /* * Lock protects against activities from other Linux tasks, * but not from changes by other I2C masters. @@ -351,7 +355,7 @@ static int at24_read(void *priv, unsigned int off, void *val, size_t count) while (count) { int status; - status = at24_eeprom_read(at24, buf, off, count); + status = at24->read_func(at24, buf, off, count); if (status < 0) { mutex_unlock(&at24->lock); return status; @@ -383,7 +387,7 @@ static int at24_write(void *priv, unsigned int off, void *val, size_t count) while (count) { int status; - status = at24_eeprom_write(at24, buf, off, count); + status = at24->write_func(at24, buf, off, count); if (status < 0) { mutex_unlock(&at24->lock); return status; @@ -518,6 +522,9 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id) at24->chip = chip; at24->num_addresses = num_addresses; + at24->read_func = at24_eeprom_read; + at24->write_func = at24_eeprom_write; + writable = !(chip.flags & AT24_FLAG_READONLY); if (writable) { if (!use_smbus || use_smbus_write) { -- 2.7.4