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Revision 8a771f77

ID8a771f77e2abfb81f1f33a986810c16ecae54ca7

Added by Hans de Goede almost 12 years ago

usb-ehci: Ensure frindex writes leave a valid frindex value

frindex is a 14 bits counter, so bits 31-14 should always be 0, and
after the commit titled "usb-ehci: frindex always is a 14 bits counter"
we rely on frindex always being a multiple of 8. I've not seen this in
practice, but theoretically a guest can write a value >= 0x4000 or a value
which is not a multiple of 8 value to frindex, this patch ensures that
things will still work when that happens.

Signed-off-by: Hans de Goede <>
Signed-off-by: Gerd Hoffmann <>

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