From: Arnd Bergmann arnd@arndb.de
This patch has been added to the 4.1 stable tree. If you have any objections, please let us know.
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[ Upstream commit 7fc1503c906f0fac62d3506a6e993e49fb996248 ]
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 David.Laight@ACULAB.COM Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/net/wireless/cw1200/wsm.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/cw1200/wsm.c b/drivers/net/wireless/cw1200/wsm.c index 9e0ca3048657..3dd46c78c1cc 100644 --- a/drivers/net/wireless/cw1200/wsm.c +++ b/drivers/net/wireless/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: