bnx2x: recognize fan failure
If fan failure is detected, MCP prevents PCI I/O registers from being
mapped to the bar, causing a fatal error as driver is unaware.
This patch recognizes such an event occurred and gracefully terminates
the probe process.
Signed-off-by: Yaniv Rosner <yaniv.rosner@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index c8ec3fc..6064294 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -11570,6 +11570,14 @@
goto err_out_disable;
}
+ pci_read_config_dword(pdev, PCICFG_REVISION_ID_OFFSET, &pci_cfg_dword);
+ if ((pci_cfg_dword & PCICFG_REVESION_ID_MASK) ==
+ PCICFG_REVESION_ID_ERROR_VAL) {
+ pr_err("PCI device error, probably due to fan failure, aborting\n");
+ rc = -ENODEV;
+ goto err_out_disable;
+ }
+
if (atomic_read(&pdev->enable_cnt) == 1) {
rc = pci_request_regions(pdev, DRV_MODULE_NAME);
if (rc) {
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
index 87cf37c..bc2f65b 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
@@ -6160,7 +6160,9 @@
#define PCICFG_COMMAND_INT_DISABLE (1<<10)
#define PCICFG_COMMAND_RESERVED (0x1f<<11)
#define PCICFG_STATUS_OFFSET 0x06
-#define PCICFG_REVESION_ID_OFFSET 0x08
+#define PCICFG_REVISION_ID_OFFSET 0x08
+#define PCICFG_REVESION_ID_MASK 0xff
+#define PCICFG_REVESION_ID_ERROR_VAL 0xff
#define PCICFG_CACHE_LINE_SIZE 0x0c
#define PCICFG_LATENCY_TIMER 0x0d
#define PCICFG_BAR_1_LOW 0x10