EDAC, altera: Do not allow suspend when EDAC is enabled

[firefly-linux-kernel-4.4.55.git] / drivers / edac / altera_edac.c

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 182c741adf3e0f059a7d0dcf04fed88625bfb289..23ef0917483cadb2c2380795d70c2714aae0ce76 100644 (file)
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -477,11 +477,31 @@ static int altr_sdram_remove(struct platform_device *pdev)
        return 0;
 }
 
+/*
+ * If you want to suspend, need to disable EDAC by removing it
+ * from the device tree or defconfig.
+ */
+#ifdef CONFIG_PM
+static int altr_sdram_prepare(struct device *dev)
+{
+       pr_err("Suspend not allowed when EDAC is enabled.\n");
+
+       return -EPERM;
+}
+
+static const struct dev_pm_ops altr_sdram_pm_ops = {
+       .prepare = altr_sdram_prepare,
+};
+#endif
+
 static struct platform_driver altr_sdram_edac_driver = {
        .probe = altr_sdram_probe,
        .remove = altr_sdram_remove,
        .driver = {
                .name = "altr_sdram_edac",
+#ifdef CONFIG_PM
+               .pm = &altr_sdram_pm_ops,
+#endif
                .of_match_table = altr_sdram_ctrl_of_match,
        },
 };