Re: host/ohci-tmio.c:104: possible novice coding error ?

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On Thu, 10 Jul 2014, David Binderman wrote:

> Hello there,
> 
> [linux-3.16-rc4/drivers/usb/host/ohci-tmio.c:104]: (warning) Redundant bitwise operation on 'pm' in 'switch' statement. 'break;' missing?
> 
>     switch (ohci->num_ports) {
>         default:
>             dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports);
>         case 3:
>             pm |= CCR_PM_USBPW3;
>         case 2:
>             pm |= CCR_PM_USBPW2;
>         case 1:
>             pm |= CCR_PM_USBPW1;
>     }
> 
> Suggest add missing breaks.

Please don't; that would mess up the driver.  Instead, fix the
definition of CCR_PM_USBPW3.  I don't know what it should be, but right 
now it's equal to CCR_PM_USBPW2, which is obviously wrong.

Alan Stern

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