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[PATCH 03/22] zd1211rw: add locking for mac->process_intr

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Signed-off-by: Jussi Kivilinna <jussi.kivilinna@xxxxxxxx>
---
 drivers/net/wireless/zd1211rw/zd_mac.c |    6 +++++-
 drivers/net/wireless/zd1211rw/zd_usb.c |    2 ++
 2 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 6107304..8b3d779 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -911,9 +911,13 @@ static int zd_op_config(struct ieee80211_hw *hw, u32 changed)
 static void zd_process_intr(struct work_struct *work)
 {
 	u16 int_status;
+	unsigned long flags;
 	struct zd_mac *mac = container_of(work, struct zd_mac, process_intr);
 
-	int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer+4));
+	spin_lock_irqsave(&mac->lock, flags);
+	int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4));
+	spin_unlock_irqrestore(&mac->lock, flags);
+
 	if (int_status & INT_CFG_NEXT_BCN)
 		dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");
 	else
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index c32a247..9493ab8 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -377,8 +377,10 @@ static inline void handle_regs_int(struct urb *urb)
 	int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
 	if (int_num == CR_INTERRUPT) {
 		struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
+		spin_lock(&mac->lock);
 		memcpy(&mac->intr_buffer, urb->transfer_buffer,
 				USB_MAX_EP_INT_BUFFER);
+		spin_unlock(&mac->lock);
 		schedule_work(&mac->process_intr);
 	} else if (intr->read_regs_enabled) {
 		intr->read_regs.length = len = urb->actual_length;

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