Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751434AbeAOUZM (ORCPT + 1 other); Mon, 15 Jan 2018 15:25:12 -0500 Received: from eddie.linux-mips.org ([148.251.95.138]:49300 "EHLO cvs.linux-mips.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750799AbeAOUZK (ORCPT ); Mon, 15 Jan 2018 15:25:10 -0500 Date: Mon, 15 Jan 2018 21:25:05 +0100 From: Ladislav Michl To: linux-omap@vger.kernel.org Cc: SF Markus Elfring , Lee Jones , Tony Lindgren , Roger Quadros , LKML , kernel-janitors@vger.kernel.org Subject: [PATCH v2] mfd: omap-usb-tll: Allocate driver data at once Message-ID: <20180115202505.GA2628@lenoch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.9.2 (2017-12-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: Allocating memory to store clk array together with driver data simplifies error unwinding and allows deleting memory allocation failure message as there is now only single point of failure already covered by allocation failure report. Signed-off-by: Ladislav Michl [Markus Elfring: simplified error unwinding, error message removal] Signed-off-by: Markus Elfring Link: https://lkml.org/lkml/2018/1/15/411 --- Changes: - v2: reindent 'rev' debug message credit Markus Elfring drivers/mfd/omap-usb-tll.c | 60 +++++++++++++++++++--------------------------- 1 file changed, 25 insertions(+), 35 deletions(-) diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c index 44a5d66314c6..446713dbee27 100644 --- a/drivers/mfd/omap-usb-tll.c +++ b/drivers/mfd/omap-usb-tll.c @@ -108,9 +108,9 @@ (x) != OMAP_EHCI_PORT_MODE_PHY) struct usbtll_omap { - int nch; /* num. of channels */ - struct clk **ch_clk; - void __iomem *base; + void __iomem *base; + int nch; /* num. of channels */ + struct clk *ch_clk[0]; /* must be the last member */ }; /*-------------------------------------------------------------------------*/ @@ -216,53 +216,49 @@ static int usbtll_omap_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct resource *res; struct usbtll_omap *tll; - int ret = 0; - int i, ver; + void __iomem *base; + int i, nch, ver; dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); - tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL); - if (!tll) { - dev_err(dev, "Memory allocation failed\n"); - return -ENOMEM; - } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - tll->base = devm_ioremap_resource(dev, res); - if (IS_ERR(tll->base)) - return PTR_ERR(tll->base); + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); - platform_set_drvdata(pdev, tll); pm_runtime_enable(dev); pm_runtime_get_sync(dev); - ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION); + ver = usbtll_read(base, OMAP_USBTLL_REVISION); switch (ver) { case OMAP_USBTLL_REV1: case OMAP_USBTLL_REV4: - tll->nch = OMAP_TLL_CHANNEL_COUNT; + nch = OMAP_TLL_CHANNEL_COUNT; break; case OMAP_USBTLL_REV2: case OMAP_USBTLL_REV3: - tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT; + nch = OMAP_REV2_TLL_CHANNEL_COUNT; break; default: - tll->nch = OMAP_TLL_CHANNEL_COUNT; - dev_dbg(dev, - "USB TLL Rev : 0x%x not recognized, assuming %d channels\n", - ver, tll->nch); + nch = OMAP_TLL_CHANNEL_COUNT; + dev_dbg(dev, "rev 0x%x not recognized, assuming %d channels\n", + ver, nch); break; } - tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk *) * tll->nch, - GFP_KERNEL); - if (!tll->ch_clk) { - ret = -ENOMEM; - dev_err(dev, "Couldn't allocate memory for channel clocks\n"); - goto err_clk_alloc; + tll = devm_kzalloc(dev, sizeof(*tll) + sizeof(tll->ch_clk[nch]), + GFP_KERNEL); + if (!tll) { + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + return -ENOMEM; } - for (i = 0; i < tll->nch; i++) { + tll->base = base; + tll->nch = nch; + platform_set_drvdata(pdev, tll); + + for (i = 0; i < nch; i++) { char clkname[] = "usb_tll_hs_usb_chx_clk"; snprintf(clkname, sizeof(clkname), @@ -282,12 +278,6 @@ static int usbtll_omap_probe(struct platform_device *pdev) spin_unlock(&tll_lock); return 0; - -err_clk_alloc: - pm_runtime_put_sync(dev); - pm_runtime_disable(dev); - - return ret; } /** -- 2.15.1