On Thu, Apr 08, 2021 at 01:39:18PM +0900, Damien Le Moal wrote:

The kernel commit de3510e52b0a ("null_blk: fix command timeout
completion handling") fixed null_blk driver to report ETIMEDOUT errors
for IO operations failed with a timeout. This change causes the dd call
in block/014 case to print the following error message:

dd: error reading '/dev/nullb0': Connection timed out

The presence of this message result in a failure of the test case even
without a kernel crash or hang, which is what the block/014 case is
testing. Avoid this failure by ignoring dd error messages using a
redirection of dd stderr to /dev/null.

Reported-by: kernel test robot <redacted>
Signed-off-by: Damien Le Moal <redacted>
---

Changes from v1:
* Add Reported-by tag

 tests/block/014 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Sorry about the delay, I was out for a couple of weeks. Applied.