Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753769Ab3GBPqB (ORCPT ); Tue, 2 Jul 2013 11:46:01 -0400 Received: from moutng.kundenserver.de ([212.227.17.9]:50818 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750774Ab3GBPp6 (ORCPT ); Tue, 2 Jul 2013 11:45:58 -0400 Date: Tue, 2 Jul 2013 17:45:55 +0200 (CEST) From: Guennadi Liakhovetski X-X-Sender: lyakh@axis700.grange To: linux-sh@vger.kernel.org cc: "Koul, Vinod" , Magnus Damm , linux-kernel@vger.kernel.org, Kuninori Morimoto Subject: [PATCH 1/3] DMA: shdma: switch to managed resource allocation In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Provags-ID: V02:K0:sWJroojLxDBV8zSCJkKIEL/JUMuNv3sAfROt5sRps5l vmJDsS0N4bSM8sPpUtLxfQdwKzdCKzFSySHjLf4eMSH90WrZFU +3a04pbibK6rxYR56quiUaJv+I8KyNNXvw3Vt9LCLozj0WMQqE HKkONJXFKt5smDSD9MgEbATN/vF04CLMXY2a+X/DZ0RdJ0LGmc Ci7jbGNoSewWKi44+5qS1x7hPedaQ7ASoB4LwKdoQ0BptqfDZ1 qBdAmvkwHfWf9hdr5D3rKJRw+n5CdwQ3aiy3s2gw+g1HAgz6F7 qjreDNcGRjTIVSeuNivpvW3G2SL6osESmEJG3mKQH28OAUdpQP i7IEds1KFIeb3sRvzhxxBdVNHZV880HSeLzF9l+q6y1ixktc5/ SsWuSyynZAc6A== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6995 Lines: 230 Switch shdma to using devm_* managed functions for allocation of memory, requesting IRQs, mapping IO resources etc. Signed-off-by: Guennadi Liakhovetski --- drivers/dma/sh/shdma-base.c | 11 +----- drivers/dma/sh/shdma.c | 71 ++++++++----------------------------------- drivers/dma/sh/sudmac.c | 1 - include/linux/shdma-base.h | 1 - 4 files changed, 15 insertions(+), 69 deletions(-) diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c index 28ca361..c5ea256 100644 --- a/drivers/dma/sh/shdma-base.c +++ b/drivers/dma/sh/shdma-base.c @@ -831,8 +831,8 @@ static irqreturn_t chan_irqt(int irq, void *dev) int shdma_request_irq(struct shdma_chan *schan, int irq, unsigned long flags, const char *name) { - int ret = request_threaded_irq(irq, chan_irq, chan_irqt, - flags, name, schan); + int ret = devm_request_threaded_irq(schan->dev, irq, chan_irq, + chan_irqt, flags, name, schan); schan->irq = ret < 0 ? ret : irq; @@ -840,13 +840,6 @@ int shdma_request_irq(struct shdma_chan *schan, int irq, } EXPORT_SYMBOL(shdma_request_irq); -void shdma_free_irq(struct shdma_chan *schan) -{ - if (schan->irq >= 0) - free_irq(schan->irq, schan); -} -EXPORT_SYMBOL(shdma_free_irq); - void shdma_chan_probe(struct shdma_dev *sdev, struct shdma_chan *schan, int id) { diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c index c7950be..3083d62 100644 --- a/drivers/dma/sh/shdma.c +++ b/drivers/dma/sh/shdma.c @@ -507,7 +507,8 @@ static int sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id, struct shdma_chan *schan; int err; - sh_chan = kzalloc(sizeof(struct sh_dmae_chan), GFP_KERNEL); + sh_chan = devm_kzalloc(sdev->dma_dev.dev, sizeof(struct sh_dmae_chan), + GFP_KERNEL); if (!sh_chan) { dev_err(sdev->dma_dev.dev, "No free memory for allocating dma channels!\n"); @@ -543,7 +544,6 @@ static int sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id, err_no_irq: /* remove from dmaengine device node */ shdma_chan_remove(schan); - kfree(sh_chan); return err; } @@ -554,14 +554,9 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev) int i; shdma_for_each_chan(schan, &shdev->shdma_dev, i) { - struct sh_dmae_chan *sh_chan = container_of(schan, - struct sh_dmae_chan, shdma_chan); BUG_ON(!schan); - shdma_free_irq(&sh_chan->shdma_chan); - shdma_chan_remove(schan); - kfree(sh_chan); } dma_dev->chancnt = 0; } @@ -698,33 +693,22 @@ static int sh_dmae_probe(struct platform_device *pdev) if (!chan || !errirq_res) return -ENODEV; - if (!request_mem_region(chan->start, resource_size(chan), pdev->name)) { - dev_err(&pdev->dev, "DMAC register region already claimed\n"); - return -EBUSY; - } - - if (dmars && !request_mem_region(dmars->start, resource_size(dmars), pdev->name)) { - dev_err(&pdev->dev, "DMAC DMARS region already claimed\n"); - err = -EBUSY; - goto ermrdmars; - } - - err = -ENOMEM; - shdev = kzalloc(sizeof(struct sh_dmae_device), GFP_KERNEL); + shdev = devm_kzalloc(&pdev->dev, sizeof(struct sh_dmae_device), + GFP_KERNEL); if (!shdev) { dev_err(&pdev->dev, "Not enough memory\n"); - goto ealloc; + return -ENOMEM; } dma_dev = &shdev->shdma_dev.dma_dev; - shdev->chan_reg = ioremap(chan->start, resource_size(chan)); - if (!shdev->chan_reg) - goto emapchan; + shdev->chan_reg = devm_ioremap_resource(&pdev->dev, chan); + if (IS_ERR(shdev->chan_reg)) + return PTR_ERR(shdev->chan_reg); if (dmars) { - shdev->dmars = ioremap(dmars->start, resource_size(dmars)); - if (!shdev->dmars) - goto emapdmars; + shdev->dmars = devm_ioremap_resource(&pdev->dev, dmars); + if (IS_ERR(shdev->dmars)) + return PTR_ERR(shdev->dmars); } if (!pdata->slave_only) @@ -785,8 +769,8 @@ static int sh_dmae_probe(struct platform_device *pdev) errirq = errirq_res->start; - err = request_irq(errirq, sh_dmae_err, irqflags, - "DMAC Address Error", shdev); + err = devm_request_irq(&pdev->dev, errirq, sh_dmae_err, irqflags, + "DMAC Address Error", shdev); if (err) { dev_err(&pdev->dev, "DMA failed requesting irq #%d, error %d\n", @@ -875,7 +859,6 @@ chan_probe_err: sh_dmae_chan_remove(shdev); #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE) - free_irq(errirq, shdev); eirq_err: #endif rst_err: @@ -889,18 +872,7 @@ rst_err: platform_set_drvdata(pdev, NULL); shdma_cleanup(&shdev->shdma_dev); eshdma: - if (dmars) - iounmap(shdev->dmars); -emapdmars: - iounmap(shdev->chan_reg); synchronize_rcu(); -emapchan: - kfree(shdev); -ealloc: - if (dmars) - release_mem_region(dmars->start, resource_size(dmars)); -ermrdmars: - release_mem_region(chan->start, resource_size(chan)); return err; } @@ -909,17 +881,12 @@ static int sh_dmae_remove(struct platform_device *pdev) { struct sh_dmae_device *shdev = platform_get_drvdata(pdev); struct dma_device *dma_dev = &shdev->shdma_dev.dma_dev; - struct resource *res; - int errirq = platform_get_irq(pdev, 0); dma_async_device_unregister(dma_dev); /* Is a NOP if this controller isn't registered with of-dma */ of_dma_controller_free(pdev->dev.of_node); - if (errirq > 0) - free_irq(errirq, shdev); - spin_lock_irq(&sh_dmae_lock); list_del_rcu(&shdev->node); spin_unlock_irq(&sh_dmae_lock); @@ -929,21 +896,9 @@ static int sh_dmae_remove(struct platform_device *pdev) sh_dmae_chan_remove(shdev); shdma_cleanup(&shdev->shdma_dev); - if (shdev->dmars) - iounmap(shdev->dmars); - iounmap(shdev->chan_reg); - platform_set_drvdata(pdev, NULL); synchronize_rcu(); - kfree(shdev); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res) - release_mem_region(res->start, resource_size(res)); - res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (res) - release_mem_region(res->start, resource_size(res)); return 0; } diff --git a/drivers/dma/sh/sudmac.c b/drivers/dma/sh/sudmac.c index e7c94bb..3477901 100644 --- a/drivers/dma/sh/sudmac.c +++ b/drivers/dma/sh/sudmac.c @@ -302,7 +302,6 @@ static void sudmac_chan_remove(struct sudmac_device *su_dev) BUG_ON(!schan); - shdma_free_irq(&sc->shdma_chan); shdma_chan_remove(schan); } dma_dev->chancnt = 0; diff --git a/include/linux/shdma-base.h b/include/linux/shdma-base.h index 9d67bb1..1aa1f19 100644 --- a/include/linux/shdma-base.h +++ b/include/linux/shdma-base.h @@ -116,7 +116,6 @@ struct shdma_dev { int shdma_request_irq(struct shdma_chan *, int, unsigned long, const char *); -void shdma_free_irq(struct shdma_chan *); bool shdma_reset(struct shdma_dev *sdev); void shdma_chan_probe(struct shdma_dev *sdev, struct shdma_chan *schan, int id); -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/