From: Michal Kazior <michal.kazior@tieto.com> To: <ath10k@lists.infradead.org> Cc: <linux-wireless@vger.kernel.org>, Michal Kazior <michal.kazior@tieto.com> Subject: [PATCH 1/3] ath10k: prevent HTC from being used after stopping Date: Thu, 18 Jul 2013 08:33:11 +0200 [thread overview] Message-ID: <1374129193-3533-2-git-send-email-michal.kazior@tieto.com> (raw) In-Reply-To: <1374129193-3533-1-git-send-email-michal.kazior@tieto.com> It was possible to submit new HTC commands after/while HTC stopped. This led to memory corruption in some rare cases. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> --- drivers/net/wireless/ath/ath10k/htc.c | 28 +++++++++++++--------------- drivers/net/wireless/ath/ath10k/htc.h | 4 ++-- 2 files changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 7d5a366..f5610f1 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -251,10 +251,14 @@ int ath10k_htc_send(struct ath10k_htc *htc, return -ENOENT; } - skb_push(skb, sizeof(struct ath10k_htc_hdr)); - spin_lock_bh(&htc->tx_lock); + if (htc->stopped) { + spin_unlock_bh(&htc->tx_lock); + return -ESHUTDOWN; + } + __skb_queue_tail(&ep->tx_queue, skb); + skb_push(skb, sizeof(struct ath10k_htc_hdr)); spin_unlock_bh(&htc->tx_lock); queue_work(htc->ar->workqueue, &ep->send_work); @@ -267,23 +271,17 @@ static int ath10k_htc_tx_completion_handler(struct ath10k *ar, { struct ath10k_htc *htc = &ar->htc; struct ath10k_htc_ep *ep = &htc->endpoint[eid]; - bool stopping; ath10k_htc_notify_tx_completion(ep, skb); /* the skb now belongs to the completion handler */ + /* note: when using TX credit flow, the re-checking of queues happens + * when credits flow back from the target. in the non-TX credit case, + * we recheck after the packet completes */ spin_lock_bh(&htc->tx_lock); - stopping = htc->stopping; - spin_unlock_bh(&htc->tx_lock); - - if (!ep->tx_credit_flow_enabled && !stopping) - /* - * note: when using TX credit flow, the re-checking of - * queues happens when credits flow back from the target. - * in the non-TX credit case, we recheck after the packet - * completes - */ + if (!ep->tx_credit_flow_enabled && !htc->stopped) queue_work(ar->workqueue, &ep->send_work); + spin_unlock_bh(&htc->tx_lock); return 0; } @@ -948,7 +946,7 @@ void ath10k_htc_stop(struct ath10k_htc *htc) struct ath10k_htc_ep *ep; spin_lock_bh(&htc->tx_lock); - htc->stopping = true; + htc->stopped = true; spin_unlock_bh(&htc->tx_lock); for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { @@ -957,7 +955,6 @@ void ath10k_htc_stop(struct ath10k_htc *htc) } ath10k_hif_stop(htc->ar); - ath10k_htc_reset_endpoint_states(htc); } /* registered target arrival callback from the HIF layer */ @@ -969,6 +966,7 @@ int ath10k_htc_init(struct ath10k *ar) spin_lock_init(&htc->tx_lock); + htc->stopped = false; ath10k_htc_reset_endpoint_states(htc); /* setup HIF layer callbacks */ diff --git a/drivers/net/wireless/ath/ath10k/htc.h b/drivers/net/wireless/ath/ath10k/htc.h index 1606c9f..e1dd8c7 100644 --- a/drivers/net/wireless/ath/ath10k/htc.h +++ b/drivers/net/wireless/ath/ath10k/htc.h @@ -335,7 +335,7 @@ struct ath10k_htc { struct ath10k *ar; struct ath10k_htc_ep endpoint[ATH10K_HTC_EP_COUNT]; - /* protects endpoint and stopping fields */ + /* protects endpoint and stopped fields */ spinlock_t tx_lock; struct ath10k_htc_ops htc_ops; @@ -349,7 +349,7 @@ struct ath10k_htc { struct ath10k_htc_svc_tx_credits service_tx_alloc[ATH10K_HTC_EP_COUNT]; int target_credit_size; - bool stopping; + bool stopped; }; int ath10k_htc_init(struct ath10k *ar); -- 1.7.9.5
WARNING: multiple messages have this Message-ID (diff)
From: Michal Kazior <michal.kazior@tieto.com> To: ath10k@lists.infradead.org Cc: linux-wireless@vger.kernel.org, Michal Kazior <michal.kazior@tieto.com> Subject: [PATCH 1/3] ath10k: prevent HTC from being used after stopping Date: Thu, 18 Jul 2013 08:33:11 +0200 [thread overview] Message-ID: <1374129193-3533-2-git-send-email-michal.kazior@tieto.com> (raw) In-Reply-To: <1374129193-3533-1-git-send-email-michal.kazior@tieto.com> It was possible to submit new HTC commands after/while HTC stopped. This led to memory corruption in some rare cases. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> --- drivers/net/wireless/ath/ath10k/htc.c | 28 +++++++++++++--------------- drivers/net/wireless/ath/ath10k/htc.h | 4 ++-- 2 files changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c index 7d5a366..f5610f1 100644 --- a/drivers/net/wireless/ath/ath10k/htc.c +++ b/drivers/net/wireless/ath/ath10k/htc.c @@ -251,10 +251,14 @@ int ath10k_htc_send(struct ath10k_htc *htc, return -ENOENT; } - skb_push(skb, sizeof(struct ath10k_htc_hdr)); - spin_lock_bh(&htc->tx_lock); + if (htc->stopped) { + spin_unlock_bh(&htc->tx_lock); + return -ESHUTDOWN; + } + __skb_queue_tail(&ep->tx_queue, skb); + skb_push(skb, sizeof(struct ath10k_htc_hdr)); spin_unlock_bh(&htc->tx_lock); queue_work(htc->ar->workqueue, &ep->send_work); @@ -267,23 +271,17 @@ static int ath10k_htc_tx_completion_handler(struct ath10k *ar, { struct ath10k_htc *htc = &ar->htc; struct ath10k_htc_ep *ep = &htc->endpoint[eid]; - bool stopping; ath10k_htc_notify_tx_completion(ep, skb); /* the skb now belongs to the completion handler */ + /* note: when using TX credit flow, the re-checking of queues happens + * when credits flow back from the target. in the non-TX credit case, + * we recheck after the packet completes */ spin_lock_bh(&htc->tx_lock); - stopping = htc->stopping; - spin_unlock_bh(&htc->tx_lock); - - if (!ep->tx_credit_flow_enabled && !stopping) - /* - * note: when using TX credit flow, the re-checking of - * queues happens when credits flow back from the target. - * in the non-TX credit case, we recheck after the packet - * completes - */ + if (!ep->tx_credit_flow_enabled && !htc->stopped) queue_work(ar->workqueue, &ep->send_work); + spin_unlock_bh(&htc->tx_lock); return 0; } @@ -948,7 +946,7 @@ void ath10k_htc_stop(struct ath10k_htc *htc) struct ath10k_htc_ep *ep; spin_lock_bh(&htc->tx_lock); - htc->stopping = true; + htc->stopped = true; spin_unlock_bh(&htc->tx_lock); for (i = ATH10K_HTC_EP_0; i < ATH10K_HTC_EP_COUNT; i++) { @@ -957,7 +955,6 @@ void ath10k_htc_stop(struct ath10k_htc *htc) } ath10k_hif_stop(htc->ar); - ath10k_htc_reset_endpoint_states(htc); } /* registered target arrival callback from the HIF layer */ @@ -969,6 +966,7 @@ int ath10k_htc_init(struct ath10k *ar) spin_lock_init(&htc->tx_lock); + htc->stopped = false; ath10k_htc_reset_endpoint_states(htc); /* setup HIF layer callbacks */ diff --git a/drivers/net/wireless/ath/ath10k/htc.h b/drivers/net/wireless/ath/ath10k/htc.h index 1606c9f..e1dd8c7 100644 --- a/drivers/net/wireless/ath/ath10k/htc.h +++ b/drivers/net/wireless/ath/ath10k/htc.h @@ -335,7 +335,7 @@ struct ath10k_htc { struct ath10k *ar; struct ath10k_htc_ep endpoint[ATH10K_HTC_EP_COUNT]; - /* protects endpoint and stopping fields */ + /* protects endpoint and stopped fields */ spinlock_t tx_lock; struct ath10k_htc_ops htc_ops; @@ -349,7 +349,7 @@ struct ath10k_htc { struct ath10k_htc_svc_tx_credits service_tx_alloc[ATH10K_HTC_EP_COUNT]; int target_credit_size; - bool stopping; + bool stopped; }; int ath10k_htc_init(struct ath10k *ar); -- 1.7.9.5 _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k
next prev parent reply other threads:[~2013-07-18 6:33 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-07-18 6:33 [PATCH 0/3] ath10k: fixes Michal Kazior 2013-07-18 6:33 ` Michal Kazior 2013-07-18 6:33 ` Michal Kazior [this message] 2013-07-18 6:33 ` [PATCH 1/3] ath10k: prevent HTC from being used after stopping Michal Kazior 2013-07-19 11:04 ` Kalle Valo 2013-07-19 11:04 ` Kalle Valo 2013-07-19 11:08 ` Michal Kazior 2013-07-19 11:08 ` Michal Kazior 2013-07-19 11:44 ` Kalle Valo 2013-07-19 11:44 ` Kalle Valo 2013-07-18 6:33 ` [PATCH 2/3] ath10k: fix memleak in mac setup Michal Kazior 2013-07-18 6:33 ` Michal Kazior 2013-07-18 6:33 ` [PATCH 3/3] ath10k: fix rts/fragmentation threshold setup Michal Kazior 2013-07-18 6:33 ` Michal Kazior 2013-07-19 11:07 ` [PATCH 0/3] ath10k: fixes Kalle Valo 2013-07-19 11:07 ` Kalle Valo 2013-07-19 11:10 ` Michal Kazior 2013-07-19 11:10 ` Michal Kazior 2013-07-19 11:43 ` Kalle Valo 2013-07-19 11:43 ` Kalle Valo 2013-07-22 12:13 ` [PATCH v2 0/4] " Michal Kazior 2013-07-22 12:13 ` Michal Kazior 2013-07-22 12:13 ` [PATCH v2 1/4] ath10k: prevent HTC from being used after stopping Michal Kazior 2013-07-22 12:13 ` Michal Kazior 2013-07-22 12:13 ` [PATCH v2 2/4] ath10k: don't reset HTC endpoints unnecessarily Michal Kazior 2013-07-22 12:13 ` Michal Kazior 2013-07-23 8:46 ` Kalle Valo 2013-07-23 8:46 ` Kalle Valo 2013-07-22 12:13 ` [PATCH v2 3/4] ath10k: fix memleak in mac setup Michal Kazior 2013-07-22 12:13 ` Michal Kazior 2013-07-22 12:13 ` [PATCH v2 4/4] ath10k: fix rts/fragmentation threshold setup Michal Kazior 2013-07-22 12:13 ` Michal Kazior 2013-07-23 8:47 ` [PATCH v2 0/4] ath10k: fixes Kalle Valo 2013-07-23 8:47 ` Kalle Valo
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