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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>
hifive-unleashed-5.1
Yaniv Rosner 2012-12-02 23:56:49 +00:00 committed by David S. Miller
parent 64e9a9b8a0
commit 092a5fc963
2 changed files with 11 additions and 1 deletions
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8
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
View File

@ -11570,6 +11570,14 @@ static int __devinit bnx2x_init_dev(struct pci_dev *pdev,
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) {

4
drivers/net/ethernet/broadcom/bnx2x/bnx2x_reg.h
View File

@ -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