From 879999cec9489f8942ebce3ec1b5f23ef948dda7 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Tue, 23 Mar 2010 21:51:14 +0100 Subject: [PATCH] ar9170usb: fix panic triggered by undersized rxstream buffer While ar9170's USB transport packet size is currently set to 8KiB, the PHY is capable of receiving AMPDUs with up to 64KiB. Such a large frame will be split over several rx URBs and exceed the previously allocated space for rx stream reconstruction. This patch increases the buffer size to 64KiB which is in fact the phy & rx stream designed size limit. Cc: stable@kernel.org Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=15591 Reported-by: Christian Mehlis Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ar9170/hw.h | 1 + drivers/net/wireless/ath/ar9170/main.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ar9170/hw.h b/drivers/net/wireless/ath/ar9170/hw.h index 0a1d4c28e68a..06f1f3c951a4 100644 --- a/drivers/net/wireless/ath/ar9170/hw.h +++ b/drivers/net/wireless/ath/ar9170/hw.h @@ -425,5 +425,6 @@ enum ar9170_txq { #define AR9170_TXQ_DEPTH 32 #define AR9170_TX_MAX_PENDING 128 +#define AR9170_RX_STREAM_MAX_SIZE 65535 #endif /* __AR9170_HW_H */ diff --git a/drivers/net/wireless/ath/ar9170/main.c b/drivers/net/wireless/ath/ar9170/main.c index f4650fcdebc9..2daeaa5bcb88 100644 --- a/drivers/net/wireless/ath/ar9170/main.c +++ b/drivers/net/wireless/ath/ar9170/main.c @@ -2515,7 +2515,7 @@ void *ar9170_alloc(size_t priv_size) * tends to split the streams into seperate rx descriptors. */ - skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE, GFP_KERNEL); + skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); if (!skb) goto err_nomem;