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Date: Mon, 16 Jun 2014 11:35:43 +0200 From: Andreas Larsson <andreas@...sler.com> To: nyushchenko@....rtsoft.ru, Grant Likely <grant.likely@...aro.org>, Rob Herring <robh+dt@...nel.org>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Thomas Gleixner <tglx@...utronix.de>, devicetree@...r.kernel.org CC: linux-kernel@...r.kernel.org, lugovskoy@....rtsoft.ru Subject: Re: [PATCH 20/21] usb: use devm_irq_of_parse_and_map() where appropriate On 2014-06-04 13:13, nyushchenko@....rtsoft.ru wrote: > From: Nikita Yushchenko <nyushchenko@....rtsoft.ru> > > This avoids leak of IRQ mapping on error paths, and makes it possible > to use devm_request_irq() without facing unmap-while-handler-installed > issues. > > Signed-off-by: Nikita Yushchenko <nyushchenko@....rtsoft.ru> > --- > drivers/usb/gadget/gr_udc.c | 17 +++++++++++------ > drivers/usb/host/ehci-grlib.c | 11 ++++------- > drivers/usb/host/ehci-orion.c | 3 ++- > drivers/usb/host/ehci-ppc-of.c | 11 ++++------- > drivers/usb/host/ehci-xilinx-of.c | 8 ++++---- > drivers/usb/host/ohci-ppc-of.c | 7 ++----- > 6 files changed, 27 insertions(+), 30 deletions(-) > > diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c > index f984ee7..0a3e586 100644 > --- a/drivers/usb/gadget/gr_udc.c > +++ b/drivers/usb/gadget/gr_udc.c > @@ -2108,19 +2108,24 @@ static int gr_probe(struct platform_device *ofdev) > if (IS_ERR(regs)) > return PTR_ERR(regs); > > - dev->irq = irq_of_parse_and_map(dev->dev->of_node, 0); > - if (!dev->irq) { > + dev->irq = devm_irq_of_parse_and_map(dev->dev, dev->dev->of_node, 0); > + if (dev->irq <= 0) { > dev_err(dev->dev, "No irq found\n"); > return -ENODEV; > } > > /* Some core configurations has separate irqs for IN and OUT events */ > - dev->irqi = irq_of_parse_and_map(dev->dev->of_node, 1); > + dev->irqi = devm_irq_of_parse_and_map(dev->dev, dev->dev->of_node, 1); > + if (dev->irqi < 0) { > + dev_err(dev->dev, "could not locate irq\n"); > + return dev->irqi; > + } > if (dev->irqi) { > - dev->irqo = irq_of_parse_and_map(dev->dev->of_node, 2); > - if (!dev->irqo) { > + dev->irqo = devm_irq_of_parse_and_map(dev->dev, > + dev->dev->of_node, 2); > + if (dev->irqo <= 0) { > dev_err(dev->dev, "Found irqi but not irqo\n"); > - return -ENODEV; > + return dev->irqo ? dev->irqo : -ENODEV; > } > } > > diff --git a/drivers/usb/host/ehci-grlib.c b/drivers/usb/host/ehci-grlib.c > index 495b6fb..666c03e 100644 > --- a/drivers/usb/host/ehci-grlib.c > +++ b/drivers/usb/host/ehci-grlib.c > @@ -111,11 +111,11 @@ static int ehci_hcd_grlib_probe(struct platform_device *op) > hcd->rsrc_start = res.start; > hcd->rsrc_len = resource_size(&res); > > - irq = irq_of_parse_and_map(dn, 0); > - if (irq == NO_IRQ) { > - dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", > + irq = devm_irq_of_parse_and_map(&op->dev, dn, 0); > + if (irq <= 0) { > + dev_err(&op->dev, "%s: devm_irq_of_parse_and_map failed\n", > __FILE__); > - rv = -EBUSY; > + rv = irq ? irq : -EINVAL; Here and in more places below you change the return value from -EBUSY to -EINVAL when irq == 0. These changes and the reason for them is not something that is commented upon in the commit message. Maybe these changes were not intended or should be in a separate patch? > goto err_irq; > } > > @@ -145,7 +145,6 @@ static int ehci_hcd_grlib_probe(struct platform_device *op) > return 0; > > err_ioremap: > - irq_dispose_mapping(irq); > err_irq: > usb_put_hcd(hcd); > > @@ -161,8 +160,6 @@ static int ehci_hcd_grlib_remove(struct platform_device *op) > > usb_remove_hcd(hcd); > > - irq_dispose_mapping(hcd->irq); > - > usb_put_hcd(hcd); > > return 0; > diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c > index 30d35e5..c88177b 100644 > --- a/drivers/usb/host/ehci-orion.c > +++ b/drivers/usb/host/ehci-orion.c > @@ -155,7 +155,8 @@ static int ehci_orion_drv_probe(struct platform_device *pdev) > pr_debug("Initializing Orion-SoC USB Host Controller\n"); > > if (pdev->dev.of_node) > - irq = irq_of_parse_and_map(pdev->dev.of_node, 0); > + irq = devm_irq_of_parse_and_map(&pdev->dev, > + pdev->dev.of_node, 0); > else > irq = platform_get_irq(pdev, 0); > if (irq <= 0) { > diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c > index 5479247..cc64210 100644 > --- a/drivers/usb/host/ehci-ppc-of.c > +++ b/drivers/usb/host/ehci-ppc-of.c > @@ -117,11 +117,11 @@ static int ehci_hcd_ppc_of_probe(struct platform_device *op) > hcd->rsrc_start = res.start; > hcd->rsrc_len = resource_size(&res); > > - irq = irq_of_parse_and_map(dn, 0); > - if (irq == NO_IRQ) { > - dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", > + irq = devm_irq_of_parse_and_map(&op->dev, dn, 0); > + if (irq <= 0) { > + dev_err(&op->dev, "%s: devm_irq_of_parse_and_map failed\n", > __FILE__); > - rv = -EBUSY; > + rv = irq ? irq : -EINVAL; > goto err_irq; > } > > @@ -174,7 +174,6 @@ static int ehci_hcd_ppc_of_probe(struct platform_device *op) > return 0; > > err_ioremap: > - irq_dispose_mapping(irq); > err_irq: > usb_put_hcd(hcd); > > @@ -194,8 +193,6 @@ static int ehci_hcd_ppc_of_remove(struct platform_device *op) > > usb_remove_hcd(hcd); > > - irq_dispose_mapping(hcd->irq); > - > /* use request_mem_region to test if the ohci driver is loaded. if so > * ensure the ohci core is operational. > */ > diff --git a/drivers/usb/host/ehci-xilinx-of.c b/drivers/usb/host/ehci-xilinx-of.c > index fe57710..6c6f8c7 100644 > --- a/drivers/usb/host/ehci-xilinx-of.c > +++ b/drivers/usb/host/ehci-xilinx-of.c > @@ -153,11 +153,11 @@ static int ehci_hcd_xilinx_of_probe(struct platform_device *op) > hcd->rsrc_start = res.start; > hcd->rsrc_len = resource_size(&res); > > - irq = irq_of_parse_and_map(dn, 0); > - if (!irq) { > - dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", > + irq = devm_irq_of_parse_and_map(&op->dev, dn, 0); > + if (irq <= 0) { > + dev_err(&op->dev, "%s: devm_irq_of_parse_and_map failed\n", > __FILE__); > - rv = -EBUSY; > + rv = irq ? irq : -EINVAL; > goto err_irq; > } > > diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c > index 965e3e9..fcdd23a 100644 > --- a/drivers/usb/host/ohci-ppc-of.c > +++ b/drivers/usb/host/ohci-ppc-of.c > @@ -121,11 +121,11 @@ static int ohci_hcd_ppc_of_probe(struct platform_device *op) > goto err_rmr; > } > > - irq = irq_of_parse_and_map(dn, 0); > + irq = devm_irq_of_parse_and_map(*op->dev, dn, 0); > if (irq == NO_IRQ) { > dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", > __FILE__); > - rv = -EBUSY; > + rv = irq ? irq : -EINVAL; > goto err_rmr; > } > > @@ -170,7 +170,6 @@ static int ohci_hcd_ppc_of_probe(struct platform_device *op) > pr_debug("%s: cannot get ehci offset from fdt\n", __FILE__); > } > > - irq_dispose_mapping(irq); > err_rmr: > usb_put_hcd(hcd); > > @@ -185,8 +184,6 @@ static int ohci_hcd_ppc_of_remove(struct platform_device *op) > > usb_remove_hcd(hcd); > > - irq_dispose_mapping(hcd->irq); > - > usb_put_hcd(hcd); > > return 0; > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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