linux-kernel - RE: [PATCH RFC v3 1/3] i2c: i2c-bfin-twi: convert to devm

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Date:	Fri, 24 May 2013 02:49:35 +0000
From:	"Zhang, Sonic" <Sonic.Zhang@...log.com>
To:	Libo Chen <libo.chen@...wei.com>,
	"wsa@...-dreams.de" <wsa@...-dreams.de>
CC:	"guz.fnst@...fujitsu.com" <guz.fnst@...fujitsu.com>,
	"uclinux-dist-devel@...ckfin.uclinux.org" 
	<uclinux-dist-devel@...ckfin.uclinux.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lizefan@...wei.com" <lizefan@...wei.com>
Subject: RE: [PATCH RFC v3 1/3] i2c: i2c-bfin-twi: convert to devm_* API

Hi Libo,

>-----Original Message-----
>From: Libo Chen [mailto:libo.chen@...wei.com]
>Sent: Thursday, May 23, 2013 8:00 PM
>To: wsa@...-dreams.de
>Cc: guz.fnst@...fujitsu.com; Zhang, Sonic; uclinux-dist-
>devel@...ckfin.uclinux.org; linux-i2c@...r.kernel.org; linux-
>kernel@...r.kernel.org; lizefan@...wei.com; libo.chen@...wei.com
>Subject: [PATCH RFC v3 1/3] i2c: i2c-bfin-twi: convert to devm_* API
>
>peripheral_request_list has got free if any one faild, so no need to free again in err
>case.
>aovid this, convert them to devm_* API
>
>Signed-off-by: Libo Chen <libo.chen@...wei.com>
>---
> drivers/i2c/busses/i2c-bfin-twi.c |   38 +++++++++---------------------------
> 1 files changed, 10 insertions(+), 28 deletions(-)
>
>diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
>index 05080c4..2b99c48 100644
>--- a/drivers/i2c/busses/i2c-bfin-twi.c
>+++ b/drivers/i2c/busses/i2c-bfin-twi.c
>@@ -621,35 +621,27 @@ static int i2c_bfin_twi_probe(struct platform_device
>*pdev)
>       int rc;
>       unsigned int clkhilow;
>
>-      iface = kzalloc(sizeof(struct bfin_twi_iface), GFP_KERNEL);
>+      iface = devm_kzalloc(&pdev->dev, sizeof(struct bfin_twi_iface),
>+                      GFP_KERNEL);
>       if (!iface) {
>               dev_err(&pdev->dev, "Cannot allocate memory\n");
>-              rc = -ENOMEM;
>-              goto out_error_nomem;
>+              return -ENOMEM;
>       }
>
>       spin_lock_init(&(iface->lock));
>
>       /* Find and map our resources */
>       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>-      if (res == NULL) {
>-              dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
>-              rc = -ENOENT;
>-              goto out_error_get_res;
>-      }

Why remove the resource mem check?

Regards,

Sonic

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