On Wed, Sep 30, 2009 at 08:57:24PM +0900, Magnus Damm wrote: > From: Magnus Damm <damm@xxxxxxxxxxxxx> > > Rework the r8a66597-udc fifo code to avoid unaligned accesses. > > Without this patch unaligned exceptions will degrade the > USB performance. The exceptions come from the fact that > the usb fifo data buffers may be misaligned. > > This patch updates the fifo access code to only use > insl()/outsl() and insw()/outsw() in the case of properly > aligned data buffers. The fallback case is that inl()/inw() > are used for misaligned buffer reads together with outb() > that is used for misaligned buffer writes. > > Signed-off-by: Magnus Damm <damm@xxxxxxxxxxxxx> > --- > > Tested on kfr2r09 with CONFIG_USB_CDC_COMPOSITE=y > > drivers/usb/gadget/r8a66597-udc.h | 105 +++++++++++++++++++++---------------- > 1 file changed, 62 insertions(+), 43 deletions(-) > Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
