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Commit 109115e1 authored by Matt Carlson's avatar Matt Carlson Committed by David S. Miller
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tg3: Fix ethtool loopback test for 5761 BX devices 



A CPMU related loopback test bug existed for AX revisions of the 5761.
While that errata has been fixed, the CPMU still slows down the core
clock too far to run the loopback test successfully.  This patch
disables the CPMU LINK_SPEED mode just like we do with the AX
revisions of the 5761 and all revisions of the 5784.

Signed-off-by: default avatarMatt Carlson <mcarlson@broadcom.com>
Signed-off-by: default avatarMichael Chan <mchan@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fd1122a2

drivers/net/tg3.c

+3 −8
Original line number Diff line number Diff line
@@ -9570,14 +9570,9 @@ static int tg3_test_loopback(struct tg3 *tp) 


		/* Turn off link-based power management. */

		cpmuctrl = tr32(TG3_CPMU_CTRL);

		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||

		    GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5761_AX)

		tw32(TG3_CPMU_CTRL,

		     cpmuctrl & ~(CPMU_CTRL_LINK_SPEED_MODE |

				  CPMU_CTRL_LINK_AWARE_MODE));

		else

			tw32(TG3_CPMU_CTRL,

			     cpmuctrl & ~CPMU_CTRL_LINK_AWARE_MODE);

	}



	if (tg3_run_loopback(tp, TG3_MAC_LOOPBACK))