mmc: core: add random fault injection

[pandora-kernel.git] / drivers / mmc / core / debugfs.c

diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 998797e..5acd707 100644 (file)
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -12,6 +12,7 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/stat.h>
+#include <linux/fault-inject.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -158,6 +159,23 @@ static int mmc_clock_opt_set(void *data, u64 val)
        return 0;
 }
 
+#ifdef CONFIG_FAIL_MMC_REQUEST
+
+static DECLARE_FAULT_ATTR(fail_mmc_request);
+
+#ifdef KERNEL
+/*
+ * Internal function. Pass the boot param fail_mmc_request to
+ * the setup fault injection attributes routine.
+ */
+static int __init setup_fail_mmc_request(char *str)
+{
+       return setup_fault_attr(&fail_mmc_request, str);
+}
+__setup("fail_mmc_request=", setup_fail_mmc_request);
+#endif /* KERNEL */
+#endif /* CONFIG_FAIL_MMC_REQUEST */
+
 DEFINE_SIMPLE_ATTRIBUTE(mmc_clock_fops, mmc_clock_opt_get, mmc_clock_opt_set,
        "%llu\n");
 
@@ -187,6 +205,13 @@ void mmc_add_host_debugfs(struct mmc_host *host)
        if (!debugfs_create_u32("clk_delay", (S_IRUSR | S_IWUSR),
                                root, &host->clk_delay))
                goto err_node;
+#endif
+#ifdef CONFIG_FAIL_MMC_REQUEST
+       host->fail_mmc_request = fail_mmc_request;
+       if (IS_ERR(fault_create_debugfs_attr("fail_mmc_request",
+                                            root,
+                                            &host->fail_mmc_request)))
+               goto err_node;
 #endif
        return;