1 files changed, 4 insertions, 0 deletions

diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
index 3a95498155a1..390920d63a24 100644
--- a/arch/um/drivers/chan_kern.c
+++ b/arch/um/drivers/chan_kern.c
@@ -547,6 +547,7 @@ int parse_chan_pair(char *str, struct line *line, int device,
         char *in, *out;
 
         if (!list_empty(chans)) {
+                line->chan_in = line->chan_out = NULL;
                 free_chan(chans);
                 INIT_LIST_HEAD(chans);
         }
@@ -565,6 +566,7 @@ int parse_chan_pair(char *str, struct line *line, int device,
 
                 new->input = 1;
                 list_add(&new->list, chans);
+                line->chan_in = new;
 
                 new = parse_chan(line, out, device, opts, error_out);
                 if (new == NULL)
@@ -572,6 +574,7 @@ int parse_chan_pair(char *str, struct line *line, int device,
 
                 list_add(&new->list, chans);
                 new->output = 1;
+                line->chan_out = new;
         }
         else {
                 new = parse_chan(line, str, device, opts, error_out);
@@ -581,6 +584,7 @@ int parse_chan_pair(char *str, struct line *line, int device,
                 list_add(&new->list, chans);
                 new->input = 1;
                 new->output = 1;
+                line->chan_in = line->chan_out = new;
         }
         return 0;
 }