On Fri, 10 May 2013, Wolfram Sang wrote:
> devm_ioremap_resource does sanity checks on the given resource. No need to
> duplicate this in the driver.
>
> Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> ---
> drivers/usb/host/ehci-atmel.c | 9 +--------
> drivers/usb/host/ehci-mxc.c | 8 +-------
> drivers/usb/host/ehci-platform.c | 6 +-----
> drivers/usb/host/ehci-sh.c | 10 +---------
> drivers/usb/host/ohci-nxp.c | 6 ------
> drivers/usb/host/ohci-platform.c | 7 +------
> 6 files changed, 5 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
> index 6642009..62bf3e6 100644
> --- a/drivers/usb/host/ehci-atmel.c
> +++ b/drivers/usb/host/ehci-atmel.c
> @@ -101,17 +101,10 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
> goto fail_create_hcd;
> }
>
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!res) {
> - dev_err(&pdev->dev,
> - "Found HC with no register addr. Check %s setup!\n",
> - dev_name(&pdev->dev));
> - retval = -ENODEV;
> - goto fail_request_resource;
> - }
> hcd->rsrc_start = res->start;
> hcd->rsrc_len = resource_size(res);
>
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> hcd->regs = devm_ioremap_resource(&pdev->dev, res);
This isn't right. You are now dereferencing an uninitialized pointer
in the assignment to hcd->rsrc_start. The compiler won't like that.
Most of the other changes in this patch suffer from the same problem.
Alan Stern
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