From f358738b1d64935b54430613691a6ef8c1f6d450 Mon Sep 17 00:00:00 2001 From: Hariprasad Shenai Date: Tue, 3 May 2016 18:58:02 +0530 Subject: [PATCH] cxgb4: Check for firmware errors in the mailbox command loop Check for firmware errors in the mailbox command loop and report them differently rather than simply timing out when the firmware goes belly up. Signed-off-by: Hariprasad Shenai Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c index 59f5e0b40286..a63addb4e72c 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c +++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c @@ -293,6 +293,7 @@ int t4_wr_mbox_meat_timeout(struct adapter *adap, int mbox, const void *cmd, u32 data_reg = PF_REG(mbox, CIM_PF_MAILBOX_DATA_A); u32 ctl_reg = PF_REG(mbox, CIM_PF_MAILBOX_CTRL_A); __be64 cmd_rpl[MBOX_LEN / 8]; + u32 pcie_fw; if ((size & 15) || size > MBOX_LEN) return -EINVAL; @@ -331,7 +332,10 @@ int t4_wr_mbox_meat_timeout(struct adapter *adap, int mbox, const void *cmd, delay_idx = 0; ms = delay[0]; - for (i = 0; i < timeout; i += ms) { + for (i = 0; + !((pcie_fw = t4_read_reg(adap, PCIE_FW_A)) & PCIE_FW_ERR_F) && + i < timeout; + i += ms) { if (sleep_ok) { ms = delay[delay_idx]; /* last element may repeat */ if (delay_idx < ARRAY_SIZE(delay) - 1) @@ -366,7 +370,7 @@ int t4_wr_mbox_meat_timeout(struct adapter *adap, int mbox, const void *cmd, } } - ret = -ETIMEDOUT; + ret = (pcie_fw & PCIE_FW_ERR_F) ? -ENXIO : -ETIMEDOUT; t4_record_mbox(adap, cmd, MBOX_LEN, access, ret); dev_err(adap->pdev_dev, "command %#x in mailbox %d timed out\n", *(const u8 *)cmd, mbox); -- 2.30.2