From 30f00847953e3aa3f710d62ffd37b42042807900 Mon Sep 17 00:00:00 2001 From: Anish Bhatt Date: Tue, 5 Aug 2014 16:05:23 -0700 Subject: [PATCH] cxgb4 : Disable recursive mailbox commands when enabling vi Enabling a Virtual Interface can result in an interrupt during the processing of the VI Enable command and, in some paths, result in an attempt to issue another command in the interrupt context, eventually crashing the system. Thus, we disable interrupts during the course of the VI Enable command and ensure enable doesn't sleep. Signed-off-by: Anish Bhatt Signed-off-by: Casey Leedom Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 5 ++++- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 2 +- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index 8b46534b06c1..4247356c16ff 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -673,9 +673,12 @@ static int link_start(struct net_device *dev) if (ret == 0) ret = t4_link_start(pi->adapter, mb, pi->tx_chan, &pi->link_cfg); - if (ret == 0) + if (ret == 0) { + local_bh_disable(); ret = t4_enable_vi_params(pi->adapter, mb, pi->viid, true, true, CXGB4_DCB_ENABLED); + local_bh_enable(); + } return ret; } diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 448bec119c3c..a853133d8db8 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -3558,7 +3558,7 @@ int t4_enable_vi_params(struct adapter *adap, unsigned int mbox, c.ien_to_len16 = htonl(FW_VI_ENABLE_CMD_IEN(rx_en) | FW_VI_ENABLE_CMD_EEN(tx_en) | FW_LEN16(c) | FW_VI_ENABLE_CMD_DCB_INFO(dcb_en)); - return t4_wr_mbox(adap, mbox, &c, sizeof(c), NULL); + return t4_wr_mbox_ns(adap, mbox, &c, sizeof(c), NULL); } /**