mwifiex: corrections in PCIe event skb handling

Preallocated event SKBs are getting reused for PCIe chipset.
Their physical addresses are shared with firmware so that
firmware can write data into them.

This patch makes sure that SKB is cleared and length is set to
default while submitting it to firmware.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Zhaoyang Liu <liuzy@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index 77b9055a2d147411515b5875f67b90210938ac9b..33c75d7410175264af3fb1a4cbb68be50a716a74 100644 (file)
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -1807,6 +1807,8 @@ static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter,
 
        if (!card->evt_buf_list[rdptr]) {
                skb_push(skb, INTF_HEADER_LEN);
+               skb_put(skb, MAX_EVENT_SIZE - skb->len);
+               memset(skb->data, 0, MAX_EVENT_SIZE);
                if (mwifiex_map_pci_memory(adapter, skb,
                                           MAX_EVENT_SIZE,
                                           PCI_DMA_FROMDEVICE))