From 2f7711642559851c187d09795a3eb51c2bde36ec Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 31 Oct 2012 16:12:43 +0100 Subject: [PATCH] usb: musb: remove hand-crafted id handling This replaced the handcrafted id handling by the PLATFORM_DEVID_AUTO value which should do the same thing. This patch probably also fixes ux500 because I did not find the "musbid" variable to remove. And we close a tiny-unlikely race window becuase the old code gave the id back before device was destroyed in the remove case. [ balbi@ti.com : fixed up two failed hunks when applying patch ] Cc: B, Ravi Cc: Santhapuri, Damodar Cc: Mian Yousaf Kaukab Cc: Bob Liu Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi --- drivers/usb/musb/am35x.c | 18 ++---------------- drivers/usb/musb/blackfin.c | 18 ++---------------- drivers/usb/musb/da8xx.c | 18 ++---------------- drivers/usb/musb/davinci.c | 18 ++---------------- drivers/usb/musb/musb_core.c | 30 ------------------------------ drivers/usb/musb/musb_core.h | 2 -- drivers/usb/musb/musb_dsps.c | 26 +++++--------------------- drivers/usb/musb/omap2430.c | 24 +++++------------------- drivers/usb/musb/tusb6010.c | 18 ++---------------- drivers/usb/musb/ux500.c | 18 ++---------------- 10 files changed, 22 insertions(+), 168 deletions(-) diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c index fdfd779..3ff30b9 100644 --- a/drivers/usb/musb/am35x.c +++ b/drivers/usb/musb/am35x.c @@ -459,7 +459,6 @@ static int __devinit am35x_probe(struct platform_device *pdev) struct clk *clk; int ret = -ENOMEM; - int musbid; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -467,18 +466,10 @@ static int __devinit am35x_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } phy_clk = clk_get(&pdev->dev, "fck"); @@ -507,7 +498,6 @@ static int __devinit am35x_probe(struct platform_device *pdev) goto err6; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &am35x_dmamask; musb->dev.coherent_dma_mask = am35x_dmamask; @@ -557,9 +547,6 @@ err4: err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -571,7 +558,6 @@ static int __devexit am35x_remove(struct platform_device *pdev) { struct am35x_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); clk_disable(glue->clk); clk_disable(glue->phy_clk); diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c index 307e726..7e4d60a 100644 --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -455,7 +455,6 @@ static int __devinit bfin_probe(struct platform_device *pdev) struct bfin_glue *glue; int ret = -ENOMEM; - int musbid; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -463,21 +462,12 @@ static int __devinit bfin_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &bfin_dmamask; musb->dev.coherent_dma_mask = bfin_dmamask; @@ -513,9 +503,6 @@ static int __devinit bfin_probe(struct platform_device *pdev) err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -527,7 +514,6 @@ static int __devexit bfin_remove(struct platform_device *pdev) { struct bfin_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); kfree(glue); diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c index e94f556..67b8ae7 100644 --- a/drivers/usb/musb/da8xx.c +++ b/drivers/usb/musb/da8xx.c @@ -480,7 +480,6 @@ static int __devinit da8xx_probe(struct platform_device *pdev) struct clk *clk; int ret = -ENOMEM; - int musbid; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -488,18 +487,10 @@ static int __devinit da8xx_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } clk = clk_get(&pdev->dev, "usb20"); @@ -515,7 +506,6 @@ static int __devinit da8xx_probe(struct platform_device *pdev) goto err4; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &da8xx_dmamask; musb->dev.coherent_dma_mask = da8xx_dmamask; @@ -558,9 +548,6 @@ err4: err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -572,7 +559,6 @@ static int __devexit da8xx_remove(struct platform_device *pdev) { struct da8xx_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); clk_disable(glue->clk); clk_put(glue->clk); diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 959a6d7..b3c0a94 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -512,7 +512,6 @@ static int __devinit davinci_probe(struct platform_device *pdev) struct clk *clk; int ret = -ENOMEM; - int musbid; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -520,18 +519,10 @@ static int __devinit davinci_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } clk = clk_get(&pdev->dev, "usb"); @@ -547,7 +538,6 @@ static int __devinit davinci_probe(struct platform_device *pdev) goto err4; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &davinci_dmamask; musb->dev.coherent_dma_mask = davinci_dmamask; @@ -590,9 +580,6 @@ err4: err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -604,7 +591,6 @@ static int __devexit davinci_remove(struct platform_device *pdev) { struct davinci_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); clk_disable(glue->clk); clk_put(glue->clk); diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 25a0d8e..78037bf 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -116,7 +116,6 @@ #define MUSB_DRIVER_NAME "musb-hdrc" const char musb_driver_name[] = MUSB_DRIVER_NAME; -static DEFINE_IDA(musb_ida); MODULE_DESCRIPTION(DRIVER_INFO); MODULE_AUTHOR(DRIVER_AUTHOR); @@ -133,35 +132,6 @@ static inline struct musb *dev_to_musb(struct device *dev) /*-------------------------------------------------------------------------*/ -int musb_get_id(struct device *dev, gfp_t gfp_mask) -{ - int ret; - int id; - - ret = ida_pre_get(&musb_ida, gfp_mask); - if (!ret) { - dev_err(dev, "failed to reserve resource for id\n"); - return -ENOMEM; - } - - ret = ida_get_new(&musb_ida, &id); - if (ret < 0) { - dev_err(dev, "failed to allocate a new id\n"); - return ret; - } - - return id; -} -EXPORT_SYMBOL_GPL(musb_get_id); - -void musb_put_id(struct device *dev, int id) -{ - - dev_dbg(dev, "removing id %d\n", id); - ida_remove(&musb_ida, id); -} -EXPORT_SYMBOL_GPL(musb_put_id); - #ifndef CONFIG_BLACKFIN static int musb_ulpi_read(struct usb_phy *phy, u32 offset) { diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index 0cef3ce..7fb4819 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -522,8 +522,6 @@ extern const char musb_driver_name[]; extern void musb_start(struct musb *musb); extern void musb_stop(struct musb *musb); -extern int musb_get_id(struct device *dev, gfp_t gfp_mask); -extern void musb_put_id(struct device *dev, int id); extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src); extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst); diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 828d2a2..2d2cd37 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -459,7 +459,7 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) struct resource *res; struct resource resources[2]; char res_name[10]; - int ret, musbid; + int ret; /* get memory resource */ sprintf(res_name, "musb%d", id); @@ -484,22 +484,14 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) resources[1] = *res; resources[1].name = "mc"; - /* get the musb id */ - musbid = musb_get_id(dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err0; - } /* allocate the child platform device */ - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(dev, "failed to allocate musb device\n"); ret = -ENOMEM; - goto err1; + goto err0; } - musb->id = musbid; musb->dev.parent = dev; musb->dev.dma_mask = &musb_dmamask; musb->dev.coherent_dma_mask = musb_dmamask; @@ -556,18 +548,10 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id) err2: platform_device_put(musb); -err1: - musb_put_id(dev, musbid); err0: return ret; } -static void dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id) -{ - musb_put_id(glue->dev, glue->musb[id]->id); - platform_device_unregister(glue->musb[id]); -} - static int __devinit dsps_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -627,7 +611,7 @@ static int __devinit dsps_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to create child pdev\n"); /* release resources of previously created instances */ for (i--; i >= 0 ; i--) - dsps_delete_musb_pdev(glue, i); + platform_device_unregister(glue->musb[i]); goto err3; } } @@ -652,7 +636,7 @@ static int __devexit dsps_remove(struct platform_device *pdev) /* delete the child platform device */ for (i = 0; i < wrp->instances ; i++) - dsps_delete_musb_pdev(glue, i); + platform_device_unregister(glue->musb[i]); /* disable usbss clocks */ pm_runtime_put(&pdev->dev); diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index a538fe1..dddd8f7 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -478,7 +478,6 @@ static int __devinit omap2430_probe(struct platform_device *pdev) struct musb_hdrc_config *config; struct resource *res; int ret = -ENOMEM; - int musbid; glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -486,21 +485,12 @@ static int __devinit omap2430_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err0; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err1; + goto err0; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &omap2430_dmamask; musb->dev.coherent_dma_mask = omap2430_dmamask; @@ -521,7 +511,7 @@ static int __devinit omap2430_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to allocate musb platfrom data\n"); ret = -ENOMEM; - goto err1; + goto err2; } data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); @@ -529,14 +519,14 @@ static int __devinit omap2430_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to allocate musb board data\n"); ret = -ENOMEM; - goto err1; + goto err2; } config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL); if (!data) { dev_err(&pdev->dev, "failed to allocate musb hdrc config\n"); - goto err1; + goto err2; } of_property_read_u32(np, "mode", (u32 *)&pdata->mode); @@ -589,9 +579,6 @@ static int __devinit omap2430_probe(struct platform_device *pdev) err2: platform_device_put(musb); -err1: - musb_put_id(&pdev->dev, musbid); - err0: return ret; } @@ -601,7 +588,6 @@ static int __devexit omap2430_remove(struct platform_device *pdev) struct omap2430_glue *glue = platform_get_drvdata(pdev); cancel_work_sync(&glue->omap_musb_mailbox_work); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); return 0; diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c index 4454561..812719b 100644 --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -1160,7 +1160,6 @@ static int __devinit tusb_probe(struct platform_device *pdev) struct tusb6010_glue *glue; int ret = -ENOMEM; - int musbid; glue = kzalloc(sizeof(*glue), GFP_KERNEL); if (!glue) { @@ -1168,21 +1167,12 @@ static int __devinit tusb_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = &tusb_dmamask; musb->dev.coherent_dma_mask = tusb_dmamask; @@ -1218,9 +1208,6 @@ static int __devinit tusb_probe(struct platform_device *pdev) err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -1232,7 +1219,6 @@ static int __devexit tusb_remove(struct platform_device *pdev) { struct tusb6010_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); kfree(glue); diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c index 4197f30..5e9053e 100644 --- a/drivers/usb/musb/ux500.c +++ b/drivers/usb/musb/ux500.c @@ -65,7 +65,6 @@ static int __devinit ux500_probe(struct platform_device *pdev) struct platform_device *musb; struct ux500_glue *glue; struct clk *clk; - int ret = -ENOMEM; glue = kzalloc(sizeof(*glue), GFP_KERNEL); @@ -74,18 +73,10 @@ static int __devinit ux500_probe(struct platform_device *pdev) goto err0; } - /* get the musb id */ - musbid = musb_get_id(&pdev->dev, GFP_KERNEL); - if (musbid < 0) { - dev_err(&pdev->dev, "failed to allocate musb id\n"); - ret = -ENOMEM; - goto err1; - } - - musb = platform_device_alloc("musb-hdrc", musbid); + musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO); if (!musb) { dev_err(&pdev->dev, "failed to allocate musb device\n"); - goto err2; + goto err1; } clk = clk_get(&pdev->dev, "usb"); @@ -101,7 +92,6 @@ static int __devinit ux500_probe(struct platform_device *pdev) goto err4; } - musb->id = musbid; musb->dev.parent = &pdev->dev; musb->dev.dma_mask = pdev->dev.dma_mask; musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask; @@ -144,9 +134,6 @@ err4: err3: platform_device_put(musb); -err2: - musb_put_id(&pdev->dev, musbid); - err1: kfree(glue); @@ -158,7 +145,6 @@ static int __devexit ux500_remove(struct platform_device *pdev) { struct ux500_glue *glue = platform_get_drvdata(pdev); - musb_put_id(&pdev->dev, glue->musb->id); platform_device_unregister(glue->musb); clk_disable(glue->clk); clk_put(glue->clk); -- 2.7.4