linux-kernel - Re: [PATCH] staging: octeon: Add prevent NAPI from scheduling

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Message-ID: <CAMo8Bf+cWRBW7ucJiqdcA0bp1Wd01_X6baGaNrG640-WmP_wFw@mail.gmail.com>
Date:	Mon, 20 Aug 2012 21:00:35 +0400
From:	Max Filippov <jcmvbkbc@...il.com>
To:	Marina Makienko <makienko@...ras.ru>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Daney <david.daney@...ium.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	"Roy.Li" <rongqing.li@...driver.com>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, ldv-project@...ras.ru
Subject: Re: [PATCH] staging: octeon: Add prevent NAPI from scheduling

On Mon, Aug 20, 2012 at 2:41 PM, Marina Makienko <makienko@...ras.ru> wrote:
> Code inspection shows that this can
> only be triggered by calling napi_enable() without
> napi_disable().
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Marina Makienko <makienko@...ras.ru>
> ---
>  drivers/staging/octeon/ethernet-rx.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/staging/octeon/ethernet-rx.c b/drivers/staging/octeon/ethernet-rx.c
> index 34afc16..db81613 100644
> --- a/drivers/staging/octeon/ethernet-rx.c
> +++ b/drivers/staging/octeon/ethernet-rx.c
> @@ -560,4 +560,5 @@ void cvm_oct_rx_shutdown(void)
>         /* Shutdown all of the NAPIs */
>         for_each_possible_cpu(i)
>                 netif_napi_del(&cvm_oct_napi[i].napi);
> +               napi_disable(&cvm_oct_napi[i].napi);
>  }

Looks like napi_disable is meant to be inside for_each_possible_cpu loop,
but curly braces are missing.

-- 
Thanks.
-- Max
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