3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Nicholas Piggin <[email protected]> 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: [email protected] # v3.2+ Signed-off-by: Nicholas Piggin <[email protected]> Reviewed-by: Vasant Hegde <[email protected]> Acked-by: Stewart Smith <[email protected]> Signed-off-by: Michael Ellerman <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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 @@ -58,6 +58,10 @@ 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; }
