From: Avinash Patil <patila@marvell.com>
Date: Tue, 18 Feb 2014 23:41:54 +0000 (-0800)
Subject: mwifiex: clean pcie ring only when device is present
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4f7ba432202c8330cc03ab959c6228d0de5dc4a3;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

mwifiex: clean pcie ring only when device is present

Write io memory to clean PCIe buffer only when PCIe device is
present else this results into crash because of invalid memory
access.

Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index 13eaeed03898..981cf6e7c73b 100644
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -559,7 +559,8 @@ mwifiex_clean_txrx(struct mwifiex_private *priv)
 	mwifiex_wmm_delete_all_ralist(priv);
 	memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
 
-	if (priv->adapter->if_ops.clean_pcie_ring)
+	if (priv->adapter->if_ops.clean_pcie_ring &&
+	    !priv->adapter->surprise_removed)
 		priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
 	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
 }