[RFC PATCH 3/4] powerpc/powernv/nvram: opal_nvram_write handle unknown OPAL errors

opal_nvram_write currently just assumes success if it encounters an
error other than OPAL_BUSY or OPAL_BUSY_EVENT. Have it return -EIO
on other errors instead.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/platforms/powernv/opal-nvram.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/powernv/opal-nvram.c b/arch/powerpc/platforms/powernv/opal-nvram.c
index 9db4398ded5d..13bf625dc3e8 100644
--- a/arch/powerpc/platforms/powernv/opal-nvram.c
+++ b/arch/powerpc/platforms/powernv/opal-nvram.c

@@ -59,6 +59,8 @@ static ssize_t opal_nvram_write(char *buf, size_t count, loff_t *index)
 		if (rc == OPAL_BUSY_EVENT)
 			opal_poll_events(NULL);
 	}
+	if (rc)
+		return -EIO;
 	*index += count;
 	return count;
 }

-- 
2.16.1