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authorYuval Mintz <Yuval.Mintz@qlogic.com>2015-04-29 08:09:49 +0300
committerDavid S. Miller <davem@davemloft.net>2015-04-29 15:49:21 -0400
commit12a8541d5c82d17d42424d46ec36929cfef06a10 (patch)
treeb3c990dd9bdda48c0f1eecd97db51ccd7f388f2f
parente913fb279c564f2af05658b3f01041757d2e9303 (diff)
bnx2x: Delay during kdump load
In a kdump environment interfaces might be re-loaded without a proper unload sequence in the previous running kernel. bnx2x management FW and driver maintains a `pulse' that notifies the FW that the driver is still up and running. Driver load on the kdump kernel should be performed only after the pulse has been out-of-sync long enough for the management FW to identify that the driver has crashed, on which point it will perform some necessary cleanup of the HW. In today's distros kdump loading is quite fast, sometimes too fast for our FW to get out-of-sync. This patch delays the bnx2x's probe during kdump to allow a proper re-load on the kdump kernel. Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 60d2b8ebba16..556dcc162a62 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -13368,6 +13368,12 @@ static int bnx2x_init_one(struct pci_dev *pdev,
bool is_vf;
int cnic_cnt;
+ /* Management FW 'remembers' living interfaces. Allow it some time
+ * to forget previously living interfaces, allowing a proper re-load.
+ */
+ if (is_kdump_kernel())
+ msleep(5000);
+
/* An estimated maximum supported CoS number according to the chip
* version.
* We will try to roughly estimate the maximum number of CoSes this chip