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authorClaudiu Manoil <claudiu.manoil@freescale.com>2013-10-09 21:20:42 +0400
committerDavid S. Miller <davem@davemloft.net>2013-10-09 22:02:02 +0400
commit53fad77375ce1005cb62105bf63265966a28bca3 (patch)
treec377c7472682034a1b9e5e5a142acecc9eba8fdc /drivers/net
parent2969b1f7259179b6810b02aa6770c8765d9674ad (diff)
downloadlinux-53fad77375ce1005cb62105bf63265966a28bca3.tar.xz
gianfar: Enable eTSEC-20 erratum w/a for P2020 Rev1
Enable workaround for P2020/P2010 erratum eTSEC 20, "Excess delays when transmitting TOE=1 large frames". The impact is that frames lager than 2500-bytes for which TOE (i.e. TCP/IP hw accelerations like Tx csum) is enabled may see excess delay before start of transmission. This erratum was fixed in Rev 2.0. Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/freescale/gianfar.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 329a20626721..9fbe4dda7a0e 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -968,6 +968,9 @@ static void __gfar_detect_errata_85xx(struct gfar_private *priv)
if ((SVR_SOC_VER(svr) == SVR_8548) && (SVR_REV(svr) == 0x20))
priv->errata |= GFAR_ERRATA_12;
+ if (((SVR_SOC_VER(svr) == SVR_P2020) && (SVR_REV(svr) < 0x20)) ||
+ ((SVR_SOC_VER(svr) == SVR_P2010) && (SVR_REV(svr) < 0x20)))
+ priv->errata |= GFAR_ERRATA_76; /* aka eTSEC 20 */
}
static void gfar_detect_errata(struct gfar_private *priv)