edac: allow specifying the error count with fake_inject

In order to test if the error counters are properly incremented,
add a way to specify how many errors were generated by a trace.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index a2bf7e9dd6de..ed0bc07b8503 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -812,18 +812,24 @@ static ssize_t edac_fake_inject_write(struct file *file,
         struct device *dev = file->private_data;
         struct mem_ctl_info *mci = to_mci(dev);
         static enum hw_event_mc_err_type type;
+        u16 errcount = mci->fake_inject_count;
+
+        if (!errcount)
+                errcount = 1;
 
         type = mci->fake_inject_ue ? HW_EVENT_ERR_UNCORRECTED
                                    : HW_EVENT_ERR_CORRECTED;
 
         printk(KERN_DEBUG
-               "Generating a %s fake error to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
+               "Generating %d %s fake error%s to %d.%d.%d to test core handling. NOTE: this won't test the driver-specific decoding logic.\n",
+                errcount,
                 (type == HW_EVENT_ERR_UNCORRECTED) ? "UE" : "CE",
+                errcount > 1 ? "s" : "",
                 mci->fake_inject_layer[0],
                 mci->fake_inject_layer[1],
                 mci->fake_inject_layer[2]
                );
-        edac_mc_handle_error(type, mci, 1, 0, 0, 0,
+        edac_mc_handle_error(type, mci, errcount, 0, 0, 0,
                              mci->fake_inject_layer[0],
                              mci->fake_inject_layer[1],
                              mci->fake_inject_layer[2],
@@ -944,6 +950,11 @@ int edac_create_debug_nodes(struct mem_ctl_info *mci)
         if (!d)
                 goto nomem;
 
+        d = debugfs_create_u16("fake_inject_count", S_IRUGO | S_IWUSR, parent,
+                                &mci->fake_inject_count);
+        if (!d)
+                goto nomem;
+
         d = debugfs_create_file("fake_inject", S_IWUSR, parent,
                                 &mci->dev,
                                 &debug_fake_inject_fops);