From 0aebff4871d26410ae485b521870bb0ffe1736f0 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Mon, 25 Apr 2011 12:42:45 +0000 Subject: [PATCH] tg3: Fix int generation hw bug for 5719 / 5720 On the 5719 and 5720, there is a bug where the hardware will misinterpret a status tag update and leave interrupts permanently disabled. This patch enables a hardware fix that works around the issue. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Reviewed-by: Benjamin Li Signed-off-by: David S. Miller --- drivers/net/tg3.c | 3 +++ drivers/net/tg3.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 693f36e94dab..a72d0314ca78 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -8198,6 +8198,9 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) ~DMA_RWCTRL_DIS_CACHE_ALIGNMENT; if (tp->pci_chip_rev_id == CHIPREV_ID_57765_A0) val &= ~DMA_RWCTRL_CRDRDR_RDMA_MRRS_MSK; + if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_57765 && + GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5717) + val |= DMA_RWCTRL_TAGGED_STAT_WA; tw32(TG3PCI_DMA_RW_CTRL, val | tp->dma_rwctrl); } else if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5784 && GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5761) { diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h index eaa76694efb5..6f37d2a23544 100644 --- a/drivers/net/tg3.h +++ b/drivers/net/tg3.h @@ -188,6 +188,7 @@ #define METAL_REV_B2 0x02 #define TG3PCI_DMA_RW_CTRL 0x0000006c #define DMA_RWCTRL_DIS_CACHE_ALIGNMENT 0x00000001 +#define DMA_RWCTRL_TAGGED_STAT_WA 0x00000080 #define DMA_RWCTRL_CRDRDR_RDMA_MRRS_MSK 0x00000380 #define DMA_RWCTRL_READ_BNDRY_MASK 0x00000700 #define DMA_RWCTRL_READ_BNDRY_DISAB 0x00000000 -- 2.20.1