4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Piggin <npiggin@xxxxxxxxx>
commit 741de617661794246f84a21a02fc5e327bffc9ad upstream.
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.
Fixes: 628daa8d5abf ("powerpc/powernv: Add RTC and NVRAM support plus RTAS fallbacks")
Cc: stable@xxxxxxxxxxxxxxx # v3.2+
Signed-off-by: Nicholas Piggin <npiggin@xxxxxxxxx>
Reviewed-by: Vasant Hegde <hegdevasant@xxxxxxxxxxxxxxxxxx>
Acked-by: Stewart Smith <stewart@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/powernv/opal-nvram.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/powerpc/platforms/powernv/opal-nvram.c
+++ b/arch/powerpc/platforms/powernv/opal-nvram.c
@@ -59,6 +59,10 @@ static ssize_t opal_nvram_write(char *bu
if (rc == OPAL_BUSY_EVENT)
opal_poll_events(NULL);
}
+
+ if (rc)
+ return -EIO;
+
*index += count;
return count;
}