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

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Date:	Fri, 24 May 2013 04:32:15 +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

Acked-by: Sonic Zhang <sonic.zhang@...log.com>


>-----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;
>-      }
>-
>-      iface->regs_base = ioremap(res->start, resource_size(res));
>-      if (iface->regs_base == NULL) {
>+      iface->regs_base = devm_ioremap_resource(&pdev->dev, res);
>+      if (IS_ERR(iface->regs_base)) {
>               dev_err(&pdev->dev, "Cannot map IO\n");
>-              rc = -ENXIO;
>-              goto out_error_ioremap;
>+              return -ENXIO;
>       }
>
>       iface->irq = platform_get_irq(pdev, 0);
>       if (iface->irq < 0) {
>               dev_err(&pdev->dev, "No IRQ specified\n");
>-              rc = -ENOENT;
>-              goto out_error_no_irq;
>+              return -ENOENT;
>       }
>
>       p_adap = &iface->adap;
>@@ -666,10 +658,10 @@ static int i2c_bfin_twi_probe(struct platform_device
>*pdev)
>                                       "i2c-bfin-twi");
>       if (rc) {
>               dev_err(&pdev->dev, "Can't setup pin mux!\n");
>-              goto out_error_pin_mux;
>+              return rc;
>       }
>
>-      rc = request_irq(iface->irq, bfin_twi_interrupt_entry,
>+      rc = devm_request_irq(&pdev->dev, iface->irq,
>+bfin_twi_interrupt_entry,
>               0, pdev->name, iface);
>       if (rc) {
>               dev_err(&pdev->dev, "Can't get IRQ %d !\n", iface->irq); @@ -
>707,16 +699,9 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
>       return 0;
>
> out_error_add_adapter:
>-      free_irq(iface->irq, iface);
> out_error_req_irq:
>-out_error_no_irq:
>       peripheral_free_list((unsigned short *)pdev->dev.platform_data);
>-out_error_pin_mux:
>-      iounmap(iface->regs_base);
>-out_error_ioremap:
>-out_error_get_res:
>-      kfree(iface);
>-out_error_nomem:
>+
>       return rc;
> }
>
>@@ -725,10 +710,7 @@ static int i2c_bfin_twi_remove(struct platform_device
>*pdev)
>       struct bfin_twi_iface *iface = platform_get_drvdata(pdev);
>
>       i2c_del_adapter(&(iface->adap));
>-      free_irq(iface->irq, iface);
>       peripheral_free_list((unsigned short *)pdev->dev.platform_data);
>-      iounmap(iface->regs_base);
>-      kfree(iface);
>
>       return 0;
> }
>--
>1.7.1
>
>


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