The error-number passed into xas_set_err() should be negative. Otherwise,
the xas_error() will return 0, and grab_mapping_entry() will return the
found entry instead of a SIGBUS error when the entry is not a value.
And then, the subsequent code path would be wrong.
Signed-off-by: Hao Li <lihao2018.f...@cn.fujitsu.com>
---
fs/dax.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/dax.c b/fs/dax.c
index 11b16729b86f..acac675fe7a6 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -488,7 +488,7 @@ static void *grab_mapping_entry(struct xa_state *xas,
if (dax_is_conflict(entry))
goto fallback;
if (!xa_is_value(entry)) {
- xas_set_err(xas, EIO);
+ xas_set_err(xas, -EIO);
goto out_unlock;
}
--
2.28.0
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