From 380f0d28431e852e07e3fa0d5f6e36cf9ea5aa5a Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 11 Oct 2012 13:48:36 +0300 Subject: usb: dwc3: core: switch event buffer allocation to devm_kzalloc() The rest of the driver is using devm_kzalloc() where possible and this patch is just making event buffer allocation follow the example. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/usb/dwc3/core.c') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index b415c0c859d..8d543ea4352 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -169,7 +169,6 @@ static void dwc3_free_one_event_buffer(struct dwc3 *dwc, struct dwc3_event_buffer *evt) { dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); - kfree(evt); } /** @@ -185,7 +184,7 @@ dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length) { struct dwc3_event_buffer *evt; - evt = kzalloc(sizeof(*evt), GFP_KERNEL); + evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); if (!evt) return ERR_PTR(-ENOMEM); @@ -215,8 +214,6 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc) if (evt) dwc3_free_one_event_buffer(dwc, evt); } - - kfree(dwc->ev_buffs); } /** @@ -235,7 +232,8 @@ static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) num = DWC3_NUM_INT(dwc->hwparams.hwparams1); dwc->num_event_buffers = num; - dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL); + dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, + GFP_KERNEL); if (!dwc->ev_buffs) { dev_err(dwc->dev, "can't allocate event buffers array\n"); return -ENOMEM; -- cgit v1.2.3-70-g09d2 From 3921426b13b1e0b2db6872a8d22d9fe2a4afe332 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 11 Oct 2012 13:54:36 +0300 Subject: usb: dwc3: core: move event buffer allocation out of dwc3_core_init() This patch is in preparation for adding PM support dwc3 driver. We want to re-use dwc3_core_init and dwc3_core_exit() functions on resume() and suspend() callbacks respectively. Moving even buffer allocation away from dwc3_core_init() will allow us to reuse the event buffer which was allocated long ago on our probe() routine. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 25 ++++++++++++------------- 1 file changed, 12 insertions(+), 13 deletions(-) (limited to 'drivers/usb/dwc3/core.c') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 8d543ea4352..b923183c43c 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -381,24 +381,14 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GCTL, reg); - ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); - if (ret) { - dev_err(dwc->dev, "failed to allocate event buffers\n"); - ret = -ENOMEM; - goto err1; - } - ret = dwc3_event_buffers_setup(dwc); if (ret) { dev_err(dwc->dev, "failed to setup event buffers\n"); - goto err1; + goto err0; } return 0; -err1: - dwc3_free_event_buffers(dwc); - err0: return ret; } @@ -406,7 +396,6 @@ err0: static void dwc3_core_exit(struct dwc3 *dwc) { dwc3_event_buffers_cleanup(dwc); - dwc3_free_event_buffers(dwc); } #define DWC3_ALIGN_MASK (16 - 1) @@ -509,10 +498,17 @@ static int __devinit dwc3_probe(struct platform_device *pdev) pm_runtime_get_sync(dev); pm_runtime_forbid(dev); + ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); + if (ret) { + dev_err(dwc->dev, "failed to allocate event buffers\n"); + ret = -ENOMEM; + goto err0; + } + ret = dwc3_core_init(dwc); if (ret) { dev_err(dev, "failed to initialize core\n"); - return ret; + goto err0; } mode = DWC3_MODE(dwc->hwparams.hwparams0); @@ -584,6 +580,9 @@ err2: err1: dwc3_core_exit(dwc); +err0: + dwc3_free_event_buffers(dwc); + return ret; } -- cgit v1.2.3-70-g09d2 From 124dafde8f8174caf5cef1c3eaba001657d66f4f Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Mon, 29 Oct 2012 18:09:53 +0100 Subject: usb: dwc3: remove custom unique id handling The lockless implementation of the unique id is quite impressive (:P) but dirver's core can handle it, we can remove it and make our code a little smaller. Cc: Anton Tikhomirov Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 39 --------------------------------------- drivers/usb/dwc3/core.h | 3 --- drivers/usb/dwc3/dwc3-exynos.c | 13 ++----------- drivers/usb/dwc3/dwc3-omap.c | 16 ++-------------- drivers/usb/dwc3/dwc3-pci.c | 16 ++-------------- 5 files changed, 6 insertions(+), 81 deletions(-) (limited to 'drivers/usb/dwc3/core.c') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index b923183c43c..d8d327a5e53 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -66,45 +66,6 @@ MODULE_PARM_DESC(maximum_speed, "Maximum supported speed."); /* -------------------------------------------------------------------------- */ -#define DWC3_DEVS_POSSIBLE 32 - -static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE); - -int dwc3_get_device_id(void) -{ - int id; - -again: - id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE); - if (id < DWC3_DEVS_POSSIBLE) { - int old; - - old = test_and_set_bit(id, dwc3_devs); - if (old) - goto again; - } else { - pr_err("dwc3: no space for new device\n"); - id = -ENOMEM; - } - - return id; -} -EXPORT_SYMBOL_GPL(dwc3_get_device_id); - -void dwc3_put_device_id(int id) -{ - int ret; - - if (id < 0) - return; - - ret = test_bit(id, dwc3_devs); - WARN(!ret, "dwc3: ID %d not in use\n", id); - smp_mb__before_clear_bit(); - clear_bit(id, dwc3_devs); -} -EXPORT_SYMBOL_GPL(dwc3_put_device_id); - void dwc3_set_mode(struct dwc3 *dwc, u32 mode) { u32 reg; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 243affc9343..49995634426 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -868,7 +868,4 @@ void dwc3_host_exit(struct dwc3 *dwc); int dwc3_gadget_init(struct dwc3 *dwc); void dwc3_gadget_exit(struct dwc3 *dwc); -extern int dwc3_get_device_id(void); -extern void dwc3_put_device_id(int id); - #endif /* __DRIVERS_USB_DWC3_CORE_H */ diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index ca6597853f9..586f1051b05 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -94,7 +94,6 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev) struct dwc3_exynos *exynos; struct clk *clk; - int devid; int ret = -ENOMEM; exynos = kzalloc(sizeof(*exynos), GFP_KERNEL); @@ -105,20 +104,16 @@ static int __devinit dwc3_exynos_probe(struct platform_device *pdev) platform_set_drvdata(pdev, exynos); - devid = dwc3_get_device_id(); - if (devid < 0) - goto err1; - ret = dwc3_exynos_register_phys(exynos); if (ret) { dev_err(&pdev->dev, "couldn't register PHYs\n"); goto err1; } - dwc3 = platform_device_alloc("dwc3", devid); + dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); if (!dwc3) { dev_err(&pdev->dev, "couldn't allocate dwc3 device\n"); - goto err2; + goto err1; } clk = clk_get(&pdev->dev, "usbdrd30"); @@ -170,8 +165,6 @@ err4: clk_put(clk); err3: platform_device_put(dwc3); -err2: - dwc3_put_device_id(devid); err1: kfree(exynos); err0: @@ -187,8 +180,6 @@ static int __devexit dwc3_exynos_remove(struct platform_device *pdev) platform_device_unregister(exynos->usb2_phy); platform_device_unregister(exynos->usb3_phy); - dwc3_put_device_id(exynos->dwc3->id); - if (pdata && pdata->phy_exit) pdata->phy_exit(pdev, pdata->phy_type); diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index ee57a10d90d..900d435f41d 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -272,7 +272,6 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev) struct resource *res; struct device *dev = &pdev->dev; - int devid; int size; int ret = -ENOMEM; int irq; @@ -315,14 +314,10 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev) return ret; } - devid = dwc3_get_device_id(); - if (devid < 0) - return -ENODEV; - - dwc3 = platform_device_alloc("dwc3", devid); + dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); if (!dwc3) { dev_err(dev, "couldn't allocate dwc3 device\n"); - goto err1; + return -ENOMEM; } context = devm_kzalloc(dev, resource_size(res), GFP_KERNEL); @@ -423,10 +418,6 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev) err2: platform_device_put(dwc3); - -err1: - dwc3_put_device_id(devid); - return ret; } @@ -437,9 +428,6 @@ static int __devexit dwc3_omap_remove(struct platform_device *pdev) platform_device_unregister(omap->dwc3); platform_device_unregister(omap->usb2_phy); platform_device_unregister(omap->usb3_phy); - - dwc3_put_device_id(omap->dwc3->id); - return 0; } diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index 94f550e37f9..13962597f3f 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -119,7 +119,6 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci, struct platform_device *dwc3; struct dwc3_pci *glue; int ret = -ENOMEM; - int devid; struct device *dev = &pci->dev; glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL); @@ -145,13 +144,7 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci, return ret; } - devid = dwc3_get_device_id(); - if (devid < 0) { - ret = -ENOMEM; - goto err1; - } - - dwc3 = platform_device_alloc("dwc3", devid); + dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); if (!dwc3) { dev_err(dev, "couldn't allocate dwc3 device\n"); ret = -ENOMEM; @@ -172,7 +165,7 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci, ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); if (ret) { dev_err(dev, "couldn't add resources to dwc3 device\n"); - goto err2; + goto err1; } pci_set_drvdata(pci, glue); @@ -195,10 +188,6 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci, err3: pci_set_drvdata(pci, NULL); platform_device_put(dwc3); - -err2: - dwc3_put_device_id(devid); - err1: pci_disable_device(pci); @@ -211,7 +200,6 @@ static void __devexit dwc3_pci_remove(struct pci_dev *pci) platform_device_unregister(glue->usb2_phy); platform_device_unregister(glue->usb3_phy); - dwc3_put_device_id(glue->dwc3->id); platform_device_unregister(glue->dwc3); pci_set_drvdata(pci, NULL); pci_disable_device(pci); -- cgit v1.2.3-70-g09d2 From e32672f0bc7ec8421aa8e580e9f2216d3bec2505 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 8 Nov 2012 15:26:41 +0200 Subject: usb: dwc3: core: don't kfree() devm_kzalloc()'ed memory commit 380f0d2 (usb: dwc3: core: switch event buffer allocation to devm_kzalloc()) was incomplete leaving a trailing kfree(evt) in an error exit path. Fix this problem by removing the trailing kfree(evt). Cc: Julia Lawall Reported-by: Fengguang Wu Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/usb/dwc3/core.c') diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index d8d327a5e53..2bd007d1646 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -153,10 +153,8 @@ dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length) evt->length = length; evt->buf = dma_alloc_coherent(dwc->dev, length, &evt->dma, GFP_KERNEL); - if (!evt->buf) { - kfree(evt); + if (!evt->buf) return ERR_PTR(-ENOMEM); - } return evt; } -- cgit v1.2.3-70-g09d2