On Mon, 2013-05-13 at 14:04 -0700, Nithin Nayak Sujir wrote: > From: Michael Chan <[email protected]> > > The 5725 family of devices (asic rev 5762), corrupts TSO packets where > the buffer is within MSS bytes of a 4G boundary (4G, 8G etc.). Detect > this condition and trigger the workaround path. > > Cc: <[email protected]> > Signed-off-by: Michael Chan <[email protected]> > Signed-off-by: Nithin Nayak Sujir <[email protected]> > --- > drivers/net/ethernet/broadcom/tg3.c | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/drivers/net/ethernet/broadcom/tg3.c > b/drivers/net/ethernet/broadcom/tg3.c > index 781be76..e285d76 100644 > --- a/drivers/net/ethernet/broadcom/tg3.c > +++ b/drivers/net/ethernet/broadcom/tg3.c > @@ -7448,6 +7448,20 @@ static inline int tg3_4g_overflow_test(dma_addr_t > mapping, int len) > return (base > 0xffffdcc0) && (base + len + 8 < base); > } > > +/* Test for TSO DMA buffers that cross into regions which are within MSS > bytes > + * of any 4GB boundaries: 4G, 8G, etc > + */ > +static inline int tg3_4g_tso_overflow_test(struct tg3 *tp, dma_addr_t > mapping, > + u32 len, u32 mss) > +{ > + if (tg3_asic_rev(tp) == ASIC_REV_5762 && mss) { > + u32 base = (u32) mapping & 0xffffffff; > + > + return ((base + len + (mss & 0x3fff)) < base); > + } > + return 0; > +} > +
I am curious : Does this condition even triggers ? -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
