From: Mauro Carvalho Chehab <mchehab@redhat.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>,
Jose Alberto Reguero <jareguero@telefonica.net>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [patch -resend] [media] az6007: precedence bug in az6007_i2c_xfer()
Date: Wed, 27 Jun 2012 10:11:00 -0300 [thread overview]
Message-ID: <4FEB0664.3030408@redhat.com> (raw)
In-Reply-To: <20120627090644.GP31212@elgon.mountain>
Em 27-06-2012 06:06, Dan Carpenter escreveu:
> The intent here was to test that the flag was clear but the '!' has
> higher precedence than the '&'. I2C_M_RD is 0x1 so the current code is
> equivalent to "&& (!sgs[i].flags) ..."
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> I sent this originally on Wed, 25 Jan 2012 and Emil Goode sent the same
> fix on Thu, May 3, 2012.
>
> diff --git a/drivers/media/dvb/dvb-usb/az6007.c b/drivers/media/dvb/dvb-usb/az6007.c
> index 4008b9c..f6f0cf9 100644
> --- a/drivers/media/dvb/dvb-usb/az6007.c
> +++ b/drivers/media/dvb/dvb-usb/az6007.c
> @@ -711,7 +711,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
> addr = msgs[i].addr << 1;
> if (((i + 1) < num)
> && (msgs[i].len == 1)
> - && (!msgs[i].flags & I2C_M_RD)
> + && (!(msgs[i].flags & I2C_M_RD))
> && (msgs[i + 1].flags & I2C_M_RD)
> && (msgs[i].addr == msgs[i + 1].addr)) {
> /*
>
Dan,
Your logic is correct, however, I didn't apply this patch because it broke
the driver.
I'll need to re-visit the driver when I have some time, in order to be
able to apply this one, without breaking the driver. I'll likely need to
change some other things on this routine.
(this has a low priority, as the driver is working properly the way it is).
So, I'm keeping your patch at patchwork, while I don't find some time for it.
Regards,
Mauro
next prev parent reply other threads:[~2012-06-27 13:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120627085800.GA3007@mwanda>
2012-06-27 9:06 ` [patch -resend] [media] az6007: precedence bug in az6007_i2c_xfer() Dan Carpenter
2012-06-27 13:11 ` Mauro Carvalho Chehab [this message]
2012-06-28 19:33 ` Dan Carpenter
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