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authorYaniv Rosner <yanivr@broadcom.com>2011-08-02 22:59:18 +0000
committerDavid S. Miller <davem@davemloft.net>2011-08-03 03:22:17 -0700
commitb507766205f85d6d69892287e346a7c264a216b4 (patch)
tree3954ab2150c528c2a38890cd56910d77bd149822 /drivers/net/bnx2x
parent9d5b36be64b42058e7fd12b71266bbf2bb7600fc (diff)
bnx2x: Fix chip hanging due to TX pipe stall.
Fix a problem in which the 578xx chip hangs after running traffic, and then pulling the network cable. This occurs since TX pipe is stalled due to missing XON indication towards the NIG. Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/bnx2x')
-rw-r--r--drivers/net/bnx2x/bnx2x_link.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/bnx2x/bnx2x_link.c b/drivers/net/bnx2x/bnx2x_link.c
index aa9958e37445..0a7091d3de29 100644
--- a/drivers/net/bnx2x/bnx2x_link.c
+++ b/drivers/net/bnx2x/bnx2x_link.c
@@ -1667,10 +1667,20 @@ static void bnx2x_xmac_disable(struct link_params *params)
{
u8 port = params->port;
struct bnx2x *bp = params->bp;
- u32 xmac_base = (port) ? GRCBASE_XMAC1 : GRCBASE_XMAC0;
+ u32 pfc_ctrl, xmac_base = (port) ? GRCBASE_XMAC1 : GRCBASE_XMAC0;
if (REG_RD(bp, MISC_REG_RESET_REG_2) &
MISC_REGISTERS_RESET_REG_2_XMAC) {
+ /*
+ * Send an indication to change the state in the NIG back to XON
+ * Clearing this bit enables the next set of this bit to get
+ * rising edge
+ */
+ pfc_ctrl = REG_RD(bp, xmac_base + XMAC_REG_PFC_CTRL_HI);
+ REG_WR(bp, xmac_base + XMAC_REG_PFC_CTRL_HI,
+ (pfc_ctrl & ~(1<<1)));
+ REG_WR(bp, xmac_base + XMAC_REG_PFC_CTRL_HI,
+ (pfc_ctrl | (1<<1)));
DP(NETIF_MSG_LINK, "Disable XMAC on port %x\n", port);
REG_WR(bp, xmac_base + XMAC_REG_CTRL, 0);
usleep_range(1000, 1000);