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path: root/drivers/block/aoe/aoechr.c
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Diffstat (limited to 'drivers/block/aoe/aoechr.c')
-rw-r--r--drivers/block/aoe/aoechr.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/block/aoe/aoechr.c b/drivers/block/aoe/aoechr.c
index ed57a890c643..42e67ad6bd20 100644
--- a/drivers/block/aoe/aoechr.c
+++ b/drivers/block/aoe/aoechr.c
@@ -39,6 +39,11 @@ struct ErrMsg {
};
static DEFINE_MUTEX(aoechr_mutex);
+
+/* A ring buffer of error messages, to be read through
+ * "/dev/etherd/err". When no messages are present,
+ * readers will block waiting for messages to appear.
+ */
static struct ErrMsg emsgs[NMSG];
static int emsgs_head_idx, emsgs_tail_idx;
static struct completion emsgs_comp;
@@ -282,7 +287,7 @@ aoechr_init(void)
int n, i;
n = register_chrdev(AOE_MAJOR, "aoechr", &aoe_fops);
- if (n < 0) {
+ if (n < 0) {
printk(KERN_ERR "aoe: can't register char device\n");
return n;
}