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path: root/drivers/edac/edac_mc_sysfs.c
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Diffstat (limited to 'drivers/edac/edac_mc_sysfs.c')
-rw-r--r--drivers/edac/edac_mc_sysfs.c150
1 files changed, 28 insertions, 122 deletions
diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index 33df7d93c857..a75acea0f674 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -229,7 +229,7 @@ static ssize_t channel_dimm_label_show(struct device *dev,
if (!rank->dimm->label[0])
return 0;
- return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n",
+ return snprintf(data, sizeof(rank->dimm->label) + 1, "%s\n",
rank->dimm->label);
}
@@ -240,14 +240,21 @@ static ssize_t channel_dimm_label_store(struct device *dev,
struct csrow_info *csrow = to_csrow(dev);
unsigned chan = to_channel(mattr);
struct rank_info *rank = csrow->channels[chan];
+ size_t copy_count = count;
- ssize_t max_size = 0;
+ if (count == 0)
+ return -EINVAL;
+
+ if (data[count - 1] == '\0' || data[count - 1] == '\n')
+ copy_count -= 1;
+
+ if (copy_count == 0 || copy_count >= sizeof(rank->dimm->label))
+ return -EINVAL;
- max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
- strncpy(rank->dimm->label, data, max_size);
- rank->dimm->label[max_size] = '\0';
+ strncpy(rank->dimm->label, data, copy_count);
+ rank->dimm->label[copy_count] = '\0';
- return max_size;
+ return count;
}
/* show function for dynamic chX_ce_count attribute */
@@ -485,7 +492,7 @@ static ssize_t dimmdev_label_show(struct device *dev,
if (!dimm->label[0])
return 0;
- return snprintf(data, EDAC_MC_LABEL_LEN, "%s\n", dimm->label);
+ return snprintf(data, sizeof(dimm->label) + 1, "%s\n", dimm->label);
}
static ssize_t dimmdev_label_store(struct device *dev,
@@ -494,14 +501,21 @@ static ssize_t dimmdev_label_store(struct device *dev,
size_t count)
{
struct dimm_info *dimm = to_dimm(dev);
+ size_t copy_count = count;
- ssize_t max_size = 0;
+ if (count == 0)
+ return -EINVAL;
- max_size = min((ssize_t) count, (ssize_t) EDAC_MC_LABEL_LEN - 1);
- strncpy(dimm->label, data, max_size);
- dimm->label[max_size] = '\0';
+ if (data[count - 1] == '\0' || data[count - 1] == '\n')
+ copy_count -= 1;
- return max_size;
+ if (copy_count == 0 || copy_count >= sizeof(dimm->label))
+ return -EINVAL;
+
+ strncpy(dimm->label, data, copy_count);
+ dimm->label[copy_count] = '\0';
+
+ return count;
}
static ssize_t dimmdev_size_show(struct device *dev,
@@ -785,47 +799,6 @@ static ssize_t mci_max_location_show(struct device *dev,
return p - data;
}
-#ifdef CONFIG_EDAC_DEBUG
-static ssize_t edac_fake_inject_write(struct file *file,
- const char __user *data,
- size_t count, loff_t *ppos)
-{
- 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 %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, errcount, 0, 0, 0,
- mci->fake_inject_layer[0],
- mci->fake_inject_layer[1],
- mci->fake_inject_layer[2],
- "FAKE ERROR", "for EDAC testing only");
-
- return count;
-}
-
-static const struct file_operations debug_fake_inject_fops = {
- .open = simple_open,
- .write = edac_fake_inject_write,
- .llseek = generic_file_llseek,
-};
-#endif
-
/* default Control file */
static DEVICE_ATTR(reset_counters, S_IWUSR, NULL, mci_reset_counters_store);
@@ -896,71 +869,6 @@ static struct device_type mci_attr_type = {
.release = mci_attr_release,
};
-#ifdef CONFIG_EDAC_DEBUG
-static struct dentry *edac_debugfs;
-
-int __init edac_debugfs_init(void)
-{
- edac_debugfs = debugfs_create_dir("edac", NULL);
- if (IS_ERR(edac_debugfs)) {
- edac_debugfs = NULL;
- return -ENOMEM;
- }
- return 0;
-}
-
-void edac_debugfs_exit(void)
-{
- debugfs_remove(edac_debugfs);
-}
-
-static int edac_create_debug_nodes(struct mem_ctl_info *mci)
-{
- struct dentry *d, *parent;
- char name[80];
- int i;
-
- if (!edac_debugfs)
- return -ENODEV;
-
- d = debugfs_create_dir(mci->dev.kobj.name, edac_debugfs);
- if (!d)
- return -ENOMEM;
- parent = d;
-
- for (i = 0; i < mci->n_layers; i++) {
- sprintf(name, "fake_inject_%s",
- edac_layer_name[mci->layers[i].type]);
- d = debugfs_create_u8(name, S_IRUGO | S_IWUSR, parent,
- &mci->fake_inject_layer[i]);
- if (!d)
- goto nomem;
- }
-
- d = debugfs_create_bool("fake_inject_ue", S_IRUGO | S_IWUSR, parent,
- &mci->fake_inject_ue);
- 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);
- if (!d)
- goto nomem;
-
- mci->debugfs = parent;
- return 0;
-nomem:
- debugfs_remove(mci->debugfs);
- return -ENOMEM;
-}
-#endif
-
/*
* Create a new Memory Controller kobject instance,
* mc<id> under the 'mc' directory
@@ -1039,9 +947,7 @@ int edac_create_sysfs_mci_device(struct mem_ctl_info *mci,
goto fail_unregister_dimm;
#endif
-#ifdef CONFIG_EDAC_DEBUG
- edac_create_debug_nodes(mci);
-#endif
+ edac_create_debugfs_nodes(mci);
return 0;
fail_unregister_dimm:
@@ -1070,7 +976,7 @@ void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
edac_dbg(0, "\n");
#ifdef CONFIG_EDAC_DEBUG
- debugfs_remove(mci->debugfs);
+ edac_debugfs_remove_recursive(mci->debugfs);
#endif
#ifdef CONFIG_EDAC_LEGACY_SYSFS
edac_delete_csrow_objects(mci);