From efdfad3205403e1d1c5c0bdcbdb647ddd89bfaa3 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Mon, 16 Jul 2012 14:25:56 +0000 Subject: [PATCH] bnx2: Try to recover from PCI block reset If the PCI block has reset, the memory enable bit will be reset and the device will not respond to MMIO access. bnx2_reset_task() currently will not recover when this happens. Add code to detect this condition and restore the PCI state. This scenario has been reported by some users. Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnx2.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c index 0ced154129a9..79cebd8525ce 100644 --- a/drivers/net/ethernet/broadcom/bnx2.c +++ b/drivers/net/ethernet/broadcom/bnx2.c @@ -6388,6 +6388,7 @@ bnx2_reset_task(struct work_struct *work) { struct bnx2 *bp = container_of(work, struct bnx2, reset_task); int rc; + u16 pcicmd; rtnl_lock(); if (!netif_running(bp->dev)) { @@ -6397,6 +6398,12 @@ bnx2_reset_task(struct work_struct *work) bnx2_netif_stop(bp, true); + pci_read_config_word(bp->pdev, PCI_COMMAND, &pcicmd); + if (!(pcicmd & PCI_COMMAND_MEMORY)) { + /* in case PCI block has reset */ + pci_restore_state(bp->pdev); + pci_save_state(bp->pdev); + } rc = bnx2_init_nic(bp, 1); if (rc) { netdev_err(bp->dev, "failed to reset NIC, closing\n"); -- 2.20.1