From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v2] xen/serial: Don't leak memory mapping if the serial initialization has failed Date: Tue, 11 Mar 2014 15:09:35 +0000 Message-ID: <531F272F.7040805@linaro.org> References: <1392833230-28706-1-git-send-email-julien.grall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1WNOJH-0003XQ-Pu for xen-devel@lists.xenproject.org; Tue, 11 Mar 2014 15:09:40 +0000 Received: by mail-wi0-f169.google.com with SMTP id hm4so950082wib.2 for ; Tue, 11 Mar 2014 08:09:37 -0700 (PDT) In-Reply-To: <1392833230-28706-1-git-send-email-julien.grall@linaro.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xenproject.org Cc: stefano.stabellini@citrix.com, tim@xen.org, ian.campbell@citrix.com List-Id: xen-devel@lists.xenproject.org Ping? On 02/19/2014 06:07 PM, Julien Grall wrote: > The memory mapping is leaking when the serial driver failed to retrieve > the IRQ. We can safely move the call to ioremap after. > > Also use ioremap_cache instead of ioremap_attr in some serial drivers. > > Signed-off-by: Julien Grall > > --- > > Ian, I have dropped your ack because the patch fundamentaly changed. > > Changes in v2: > - s/ioremap_attr/ioremap_nocache > - Move ioremap call after retrieve the IRQ > --- > xen/drivers/char/exynos4210-uart.c | 13 +++++++------ > xen/drivers/char/omap-uart.c | 15 ++++++++------- > xen/drivers/char/pl011.c | 15 +++++++-------- > 3 files changed, 22 insertions(+), 21 deletions(-) > > diff --git a/xen/drivers/char/exynos4210-uart.c b/xen/drivers/char/exynos4210-uart.c > index 0619575..150d49b 100644 > --- a/xen/drivers/char/exynos4210-uart.c > +++ b/xen/drivers/char/exynos4210-uart.c > @@ -334,12 +334,6 @@ static int __init exynos4210_uart_init(struct dt_device_node *dev, > return res; > } > > - uart->regs = ioremap_nocache(addr, size); > - if ( !uart->regs ) > - { > - early_printk("exynos4210: Unable to map the UART memory\n"); > - return -ENOMEM; > - } > res = dt_device_get_irq(dev, 0, &uart->irq); > if ( res ) > { > @@ -347,6 +341,13 @@ static int __init exynos4210_uart_init(struct dt_device_node *dev, > return res; > } > > + uart->regs = ioremap_nocache(addr, size); > + if ( !uart->regs ) > + { > + early_printk("exynos4210: Unable to map the UART memory\n"); > + return -ENOMEM; > + } > + > uart->vuart.base_addr = addr; > uart->vuart.size = size; > uart->vuart.data_off = UTXH; > diff --git a/xen/drivers/char/omap-uart.c b/xen/drivers/char/omap-uart.c > index c1580ef..b29f610 100644 > --- a/xen/drivers/char/omap-uart.c > +++ b/xen/drivers/char/omap-uart.c > @@ -326,13 +326,6 @@ static int __init omap_uart_init(struct dt_device_node *dev, > return res; > } > > - uart->regs = ioremap_attr(addr, size, PAGE_HYPERVISOR_NOCACHE); > - if ( !uart->regs ) > - { > - early_printk("omap-uart: Unable to map the UART memory\n"); > - return -ENOMEM; > - } > - > res = dt_device_get_irq(dev, 0, &uart->irq); > if ( res ) > { > @@ -340,6 +333,14 @@ static int __init omap_uart_init(struct dt_device_node *dev, > return res; > } > > + uart->regs = ioremap_nocache(addr, size); > + if ( !uart->regs ) > + { > + early_printk("omap-uart: Unable to map the UART memory\n"); > + return -ENOMEM; > + } > + > + > uart->vuart.base_addr = addr; > uart->vuart.size = size; > uart->vuart.data_off = UART_THR; > diff --git a/xen/drivers/char/pl011.c b/xen/drivers/char/pl011.c > index fd82511..fe99af6 100644 > --- a/xen/drivers/char/pl011.c > +++ b/xen/drivers/char/pl011.c > @@ -248,14 +248,6 @@ static int __init pl011_uart_init(struct dt_device_node *dev, > return res; > } > > - uart->regs = ioremap_attr(addr, size, PAGE_HYPERVISOR_NOCACHE); > - if ( !uart->regs ) > - { > - early_printk("pl011: Unable to map the UART memory\n"); > - > - return -ENOMEM; > - } > - > res = dt_device_get_irq(dev, 0, &uart->irq); > if ( res ) > { > @@ -263,6 +255,13 @@ static int __init pl011_uart_init(struct dt_device_node *dev, > return res; > } > > + uart->regs = ioremap_nocache(addr, size); > + if ( !uart->regs ) > + { > + early_printk("pl011: Unable to map the UART memory\n"); > + return -ENOMEM; > + } > + > uart->vuart.base_addr = addr; > uart->vuart.size = size; > uart->vuart.data_off = DR; > -- Julien Grall