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Message-ID: <AANLkTinYUyHJxO-AY8YYaRHu9nuPdyw4aqYJWKOqrCXv@mail.gmail.com>
Date: Sun, 26 Sep 2010 22:15:18 +0530
From: Rahul Ruikar <rahul.ruikar@...il.com>
To: linux-pcmcia@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Rahul Ruikar <rahul.ruikar@...il.com>
Subject: Re: [PATCH] pcmcia: vrc4173_cardu: Fix error path for
pci_release_regions and pci_disable_device
somethings missed... i will resend this patch.
- Rahul Ruikar
On 26 September 2010 22:11, Rahul Ruikar <rahul.ruikar@...il.com> wrote:
> - pci_release_regions called during return error path.
> - pci_disable_device called for cases where earlier it was enabled.
> - code duplication avoided/reduced by adding resource release at goto statements.
>
> Signed-off-by: Rahul Ruikar <rahul.ruikar@...il.com>
> ---
> drivers/pcmcia/vrc4173_cardu.c | 56 +++++++++++++++++++++++++++-------------
> 1 files changed, 38 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/pcmcia/vrc4173_cardu.c b/drivers/pcmcia/vrc4173_cardu.c
> index 9b3c158..5f43a72 100644
> --- a/drivers/pcmcia/vrc4173_cardu.c
> +++ b/drivers/pcmcia/vrc4173_cardu.c
> @@ -474,43 +474,63 @@ static int __devinit vrc4173_cardu_probe(struct pci_dev *dev,
> return err;
>
> start = pci_resource_start(dev, 0);
> - if (start == 0)
> - return -ENODEV;
> + if (start == 0) {
> + ret = -ENODEV;
> + goto disable;
> + }
>
> len = pci_resource_len(dev, 0);
> - if (len == 0)
> - return -ENODEV;
> + if (len == 0) {
> + ret = -ENODEV;
> + goto disable;
> + }
>
> - if (((flags = pci_resource_flags(dev, 0)) & IORESOURCE_MEM) == 0)
> - return -EBUSY;
> + flags = pci_resource_flags(dev, 0);
> + if ((flags & IORESOURCE_MEM) == 0) {
> + ret = -EBUSY;
> + goto disable;
> + }
>
> - if ((err = pci_request_regions(dev, socket->name)) < 0)
> - return err;
> + err = pci_request_regions(dev, socket->name);
> + if (err < 0) {
> + ret = err;
> + goto disable;
> + }
>
> socket->base = ioremap(start, len);
> - if (socket->base == NULL)
> - return -ENODEV;
> + if (socket->base == NULL) {
> + ret = -ENODEV;
> + goto release;
> + }
>
> socket->dev = dev;
>
> socket->pcmcia_socket = pcmcia_register_socket(slot, &cardu_operations, 1);
> if (socket->pcmcia_socket == NULL) {
> - iounmap(socket->base);
> - socket->base = NULL;
> - return -ENOMEM;
> + ret = -ENOMEM;
> + goto unmap;
> }
>
> if (request_irq(dev->irq, cardu_interrupt, IRQF_SHARED, socket->name, socket) < 0) {
> - pcmcia_unregister_socket(socket->pcmcia_socket);
> - socket->pcmcia_socket = NULL;
> - iounmap(socket->base);
> - socket->base = NULL;
> - return -EBUSY;
> + ret = -EBUSY;
> + goto unregister;
> }
>
> printk(KERN_INFO "%s at %#08lx, IRQ %d\n", socket->name, start, dev->irq);
>
> return 0;
> +
> +unregister:
> + pcmcia_unregister_socket(socket->pcmcia_socket);
> + socket->pcmcia_socket = NULL;
> +unmap:
> + iounmap(socket->base);
> + socket->base = NULL;
> +release:
> + pci_release_regions(dev);
> +disable:
> + pci_disable_device(dev);
> + return ret;
> }
>
> static int __devinit vrc4173_cardu_setup(char *options)
> --
> 1.7.2.3
>
>
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