From 7fc1503c906f0fac62d3506a6e993e49fb996248 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 25 Oct 2016 22:21:04 +0200 Subject: [PATCH] cw1200: fix bogus maybe-uninitialized warning MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit On x86, the cw1200 driver produces a rather silly warning about the possible use of the 'ret' variable without an initialization presumably after being confused by the architecture specific definition of WARN_ON: drivers/net/wireless/st/cw1200/wsm.c: In function ‘wsm_handle_rx’: drivers/net/wireless/st/cw1200/wsm.c:1457:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized] We have already checked that 'count' is larger than 0 here, so we know that 'ret' is initialized. Changing the 'for' loop into do/while also makes this clear to the compiler. Suggested-by: David Laight Signed-off-by: Arnd Bergmann Signed-off-by: Kalle Valo --- drivers/net/wireless/st/cw1200/wsm.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/st/cw1200/wsm.c b/drivers/net/wireless/st/cw1200/wsm.c index ffb245e..be4c22e 100644 --- a/drivers/net/wireless/st/cw1200/wsm.c +++ b/drivers/net/wireless/st/cw1200/wsm.c @@ -379,7 +379,6 @@ static int wsm_multi_tx_confirm(struct cw1200_common *priv, { int ret; int count; - int i; count = WSM_GET32(buf); if (WARN_ON(count <= 0)) @@ -395,11 +394,10 @@ static int wsm_multi_tx_confirm(struct cw1200_common *priv, } cw1200_debug_txed_multi(priv, count); - for (i = 0; i < count; ++i) { + do { ret = wsm_tx_confirm(priv, buf, link_id); - if (ret) - return ret; - } + } while (!ret && --count); + return ret; underflow: -- 2.7.4