From: Matt Carlson Date: Tue, 25 Jan 2011 15:58:53 +0000 (+0000) Subject: tg3: Disable MAC loopback test for CPMU devices X-Git-Tag: v2.6.39-rc1~468^2~464 X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=aba49f2421d5287692aee961ab4ce2981fdf4939;p=cascardo%2Flinux.git tg3: Disable MAC loopback test for CPMU devices On CPMU devices, the MAC loopback test does not test any important paths the phy loopback test doesn't also test. The phy loopback test is the more comprehensive test. This patch disables the MAC loopback test for these devices. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 9c5690366f37..f52466d2ece3 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -10840,9 +10840,11 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode) if (loopback_mode == TG3_MAC_LOOPBACK) { /* HW errata - mac loopback fails in some cases on 5780. * Normal traffic and PHY loopback are not affected by - * errata. + * errata. Also, the MAC loopback test is deprecated for + * all newer ASIC revisions. */ - if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780) + if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5780 || + (tp->tg3_flags & TG3_FLAG_CPMU_PRESENT)) return 0; mac_mode = tp->mac_mode &