From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Tue, 13 Nov 2012 07:44:54 +0000 Subject: [patch] ALSA: es1968: precedence bug in snd_es1968_tea575x_get_pins() Message-Id: <20121113074454.GB13198@elgon.mountain> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Jaroslav Kysela Cc: alsa-devel@alsa-project.org, Ondrej Zary , Mauro Carvalho Chehab , Takashi Iwai , Rusty Russell , kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, Hans de Goede I don't think this works as intended. '|' higher precedence than ?: so the bitwize OR "0 | (val & STR_MOST)" is a no-op. I have re-written it to be more clear. Signed-off-by: Dan Carpenter --- I don't have a way to test this. diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c index 50169bc..7266020 100644 --- a/sound/pci/es1968.c +++ b/sound/pci/es1968.c @@ -2581,9 +2581,14 @@ static u8 snd_es1968_tea575x_get_pins(struct snd_tea575x *tea) struct es1968 *chip = tea->private_data; unsigned long io = chip->io_port + GPIO_DATA; u16 val = inw(io); - - return (val & STR_DATA) ? TEA575X_DATA : 0 | - (val & STR_MOST) ? TEA575X_MOST : 0; + u8 ret; + + ret = 0; + if (val & STR_DATA) + ret |= TEA575X_DATA; + if (val & STR_MOST) + ret |= TEA575X_MOST; + return ret; } static void snd_es1968_tea575x_set_direction(struct snd_tea575x *tea, bool output)