Re: [PATCH] net: dsa: b53: check for timeout

From: trix@redhat.com
Date: Fri, 21 Aug 2020 06:56:00 -0700

From: Tom Rix <trix@redhat.com>

clang static analysis reports this problem

b53_common.c:1583:13: warning: The left expression of the compound
  assignment is an uninitialized value. The computed value will
  also be garbage
        ent.port &= ~BIT(port);
        ~~~~~~~~ ^

ent is set by a successful call to b53_arl_read().  Unsuccessful
calls are caught by an switch statement handling specific returns.
b32_arl_read() calls b53_arl_op_wait() which fails with the
unhandled -ETIMEDOUT.

So add -ETIMEDOUT to the switch statement.  Because
b53_arl_op_wait() already prints out a message, do not add another
one.

Fixes: 1da6df85c6fb ("net: dsa: b53: Implement ARL add/del/dump operations")

Signed-off-by: Tom Rix <trix@redhat.com>

Applied and queued up for -stable, thanks.