UBI: dump stack when switching to R/O mode

If we have debugging enabled and switching to R/O mode because of an error -
dump the stack to improve UBI error reporting and make the further diagnostics
easier to do.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index fd19f8d3bce8..dc64c767fd21 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -667,6 +667,7 @@ static inline void ubi_ro_mode(struct ubi_device *ubi)
         if (!ubi->ro_mode) {
                 ubi->ro_mode = 1;
                 ubi_warn("switch to read-only mode");
+                ubi_dbg_dump_stack();
         }
 }