From: Anish Bhatt Date: Tue, 5 Aug 2014 23:05:23 +0000 (-0700) Subject: cxgb4 : Disable recursive mailbox commands when enabling vi X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30f00847953e3aa3f710d62ffd37b42042807900;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 --- 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); } /**