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-rw-r--r--drivers/edac/i5100_edac.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/edac/i5100_edac.c b/drivers/edac/i5100_edac.c
index a8767a6c1481..509eec860c37 100644
--- a/drivers/edac/i5100_edac.c
+++ b/drivers/edac/i5100_edac.c
@@ -24,6 +24,8 @@
/* register addresses and bit field accessors... */
/* device 16, func 1 */
+#define I5100_MC 0x40 /* Memory Control Register */
+#define I5100_MC_ERRDETEN(a) ((a) >> 5 & 1)
#define I5100_MS 0x44 /* Memory Status Register */
#define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */
#define I5100_SPDDATA_RDO(a) ((a) >> 15 & 1)
@@ -688,6 +690,14 @@ static int __devinit i5100_init_one(struct pci_dev *pdev,
goto bail;
}
+ /* ECC enabled? */
+ pci_read_config_dword(pdev, I5100_MC, &dw);
+ if (!I5100_MC_ERRDETEN(dw)) {
+ printk(KERN_INFO "i5100_edac: ECC not enabled.\n");
+ ret = -ENODEV;
+ goto bail;
+ }
+
/* figure out how many ranks, from strapped state of 48GB_Mode input */
pci_read_config_dword(pdev, I5100_MS, &dw);
ranksperch = !!(dw & (1 << 8)) * 2 + 4;