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mwifiex: clean pcie ring only when device is present

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commit 4f7ba432202c8330cc03ab959c6228d0de5dc4a3 upstream.

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Avinash Patil 2014-02-18 15:41:54 -08:00 committed by Greg Kroah-Hartman
parent 45e5cb4f43
commit 193e9c47e0
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/mwifiex/wmm.c
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@ -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);
}