From: Kalle Valo <kvalo@codeaurora.org>
To: Larry Finger <Larry.Finger@lwfinger.net>
Cc: linux-wireless@vger.kernel.org,
Larry Finger <Larry.Finger@lwfinger.net>,
Kevin Mullican <kevin@mullican.com>, Shao Fu <shaofu@realtek.com>,
Stable <stable@vger.kernel.org>
Subject: Re: rtlwifi: Fix IOMMU mapping leak in AP mode
Date: Sun, 22 Mar 2015 05:53:07 +0000 (UTC) [thread overview]
Message-ID: <20150322055307.B511F140187@smtp.codeaurora.org> (raw)
In-Reply-To: <1426968965-30161-1-git-send-email-Larry.Finger@lwfinger.net>
> Transmission of an AP beacon does not call the TX interrupt service routine,
> which usually does the cleanup. Instead, cleanup is handled in a tasklet
> completion routine. Unfortunately, this routine has a serious bug in that it does
> not release the DMA mapping before it frees the skb, thus one IOMMU mapping is
> leaked for each beacon. The test system failed with no free IOMMU mapping slots
> approximately one hour after hostapd was used to start an AP.
>
> This issue was reported and tested at https://github.com/lwfinger/rtlwifi_new/issues/30.
>
> Reported-and-tested-by: Kevin Mullican <kevin@mullican.com>
> Cc: Kevin Mullican <kevin@mullican.com>
> Signed-off-by: Shao Fu <shaofu@realtek.com>
> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
> Cc: Stable <stable@vger.kernel.org> [3.18+]
Thanks, applied to wireless-drivers.git.
Kalle Valo
prev parent reply other threads:[~2015-03-22 5:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-21 20:16 [PATCH] rtlwifi: Fix IOMMU mapping leak in AP mode Larry Finger
2015-03-22 5:53 ` Kalle Valo [this message]
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