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Koen Kooi
aefc6c8c3c
The psp tree added a patch to limit the beaglebone to 500MHz when powered by USB, which triggered conflicts in the patches. The 3.2.16 series has been rediffed as well, no functional changes. Signed-off-by: Koen Kooi <koen@dominion.thruhere.net> Signed-off-by: Denys Dmytriyenko <denys@ti.com>
46 lines
1.7 KiB
Diff
46 lines
1.7 KiB
Diff
From 98861c7257e3ce6dd351c07abed856e73add7858 Mon Sep 17 00:00:00 2001
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From: Larry Finger <Larry.Finger@lwfinger.net>
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Date: Mon, 26 Mar 2012 10:48:20 -0500
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Subject: [PATCH 07/68] rtlwifi: Add missing DMA buffer unmapping for PCI
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drivers
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commit 673f7786e205c87b5d978c62827b9a66d097bebb upstream.
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In https://bugzilla.kernel.org/show_bug.cgi?id=42976, a system with driver
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rtl8192se used as an AP suffers from "Out of SW-IOMMU space" errors. These
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are caused by the DMA buffers used for beacons never being unmapped.
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This bug was also reported at
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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/961618
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Reported-and-Tested-by: Da Xue <da@lessconfused.com>
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Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
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Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/net/wireless/rtlwifi/pci.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
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index 9afcad3..d44d398 100644
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--- a/drivers/net/wireless/rtlwifi/pci.c
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+++ b/drivers/net/wireless/rtlwifi/pci.c
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@@ -926,8 +926,13 @@ static void _rtl_pci_prepare_bcn_tasklet(struct ieee80211_hw *hw)
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memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
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ring = &rtlpci->tx_ring[BEACON_QUEUE];
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pskb = __skb_dequeue(&ring->queue);
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- if (pskb)
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+ if (pskb) {
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+ struct rtl_tx_desc *entry = &ring->desc[ring->idx];
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+ pci_unmap_single(rtlpci->pdev, rtlpriv->cfg->ops->get_desc(
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+ (u8 *) entry, true, HW_DESC_TXBUFF_ADDR),
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+ pskb->len, PCI_DMA_TODEVICE);
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kfree_skb(pskb);
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+ }
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/*NB: the beacon data buffer must be 32-bit aligned. */
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pskb = ieee80211_beacon_get(hw, mac->vif);
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--
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1.7.10
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