On Sun, Aug 05, 2012 at 06:51:34PM -0700, kuninori.morimoto.gx@xxxxxxxxxxx wrote:
> We should avoid using BUG_ON() in drivers.
> This patch switch to use WARN_ON() from BUG_ON(),
> and avoid NULL pointer access by new macro.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
> ---
> v2 -> v3
>
> - BUG_ON -> WARN_ON
>
> drivers/usb/host/ehci-platform.c | 18 ++++++++++--------
> 1 files changed, 10 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index 4b1d896..db27dfe 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -21,6 +21,8 @@
> #include <linux/platform_device.h>
> #include <linux/usb/ehci_pdriver.h>
>
> +#define ehci_pdata_get(pdata, x) ((pdata) ? (pdata)->x : 0)
> +
FWIW, I think that an inline function would be a slight improvement over
a macro here. Likewise for the 2nd patch of this series.
> static int ehci_platform_reset(struct usb_hcd *hcd)
> {
> struct platform_device *pdev = to_platform_device(hcd->self.controller);
> @@ -28,19 +30,19 @@ static int ehci_platform_reset(struct usb_hcd *hcd)
> struct ehci_hcd *ehci = hcd_to_ehci(hcd);
> int retval;
>
> - hcd->has_tt = pdata->has_tt;
> - ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
> - ehci->big_endian_desc = pdata->big_endian_desc;
> - ehci->big_endian_mmio = pdata->big_endian_mmio;
> + hcd->has_tt = ehci_pdata_get(pdata, has_tt);
> + ehci->has_synopsys_hc_bug = ehci_pdata_get(pdata, has_synopsys_hc_bug);
> + ehci->big_endian_desc = ehci_pdata_get(pdata, big_endian_desc);
> + ehci->big_endian_mmio = ehci_pdata_get(pdata, big_endian_mmio);
>
> - ehci->caps = hcd->regs + pdata->caps_offset;
> + ehci->caps = hcd->regs + ehci_pdata_get(pdata, caps_offset);
> retval = ehci_setup(hcd);
> if (retval)
> return retval;
>
> - if (pdata->port_power_on)
> + if (ehci_pdata_get(pdata, port_power_on))
> ehci_port_power(ehci, 1);
> - if (pdata->port_power_off)
> + if (ehci_pdata_get(pdata, port_power_off))
> ehci_port_power(ehci, 0);
>
> return 0;
> @@ -85,7 +87,7 @@ static int __devinit ehci_platform_probe(struct platform_device *dev)
> int irq;
> int err = -ENOMEM;
>
> - BUG_ON(!dev->dev.platform_data);
> + WARN_ON(!dev->dev.platform_data);
>
> if (usb_disabled())
> return -ENODEV;
> --
> 1.7.5.4
>
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