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Date: Wed, 05 Oct 2011 17:19:38 +0800 From: Axel Lin <axel.lin@...il.com> To: linux-kernel@...r.kernel.org Cc: Samu Onkalo <samu.p.onkalo@...ia.com>, Richard Purdie <rpurdie@...ys.net>, Andrew Morton <akpm@...ux-foundation.org> Subject: [PATCH] leds: leds-lp5521: Avoid writing uninitialized value to LP5521_REG_OP_MODE register If lp5521_read fails, engine_state variable is not initialized. If lp5521_read fails, we should return error. This patch fixes below warning. CC drivers/leds/leds-lp5521.o drivers/leds/leds-lp5521.c: In function 'lp5521_set_engine_mode': drivers/leds/leds-lp5521.c:168: warning: 'engine_state' may be used uninitialized in this function Signed-off-by: Axel Lin <axel.lin@...il.com> --- drivers/leds/leds-lp5521.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 9fc122c..89134d9 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -175,6 +175,8 @@ static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode) mode = LP5521_CMD_DIRECT; ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state); + if (ret < 0) + return ret; /* set mode only for this engine */ engine_state &= ~(engine->engine_mask); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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