This is a note to let you know that I've just added the patch titled
mwifiex: avoid memsetting PCIe event buffer
to the 4.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mwifiex-avoid-memsetting-pcie-event-buffer.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 14d9c11c91a606fed65eaae2455423a23bb4ae59 Mon Sep 17 00:00:00 2001
From: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Date: Fri, 18 Sep 2015 06:32:10 -0700
Subject: mwifiex: avoid memsetting PCIe event buffer
From: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
commit 14d9c11c91a606fed65eaae2455423a23bb4ae59 upstream.
Preallocated PCIe buffer is being reused for all PCIe interface
events. Physical address of the buffer is shared with firmware
so that it can perform DMA on it. As event length is specified
in the header, there should not be a problem if the buffer gets
overwritten.
We will save some cycles by avoiding memset everytime while
submitting the buffer to firmware.
Fixes: 2728cecdc7d6bf3d21(mwifiex: corrections in PCIe event skb)
Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/mwifiex/pcie.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -1815,7 +1815,6 @@ static int mwifiex_pcie_event_complete(s
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))
Patches currently in stable-queue which might be from akarwar@xxxxxxxxxxx are
queue-4.3/mwifiex-avoid-memsetting-pcie-event-buffer.patch
queue-4.3/mwifiex-fix-null-pointer-dereference-during-hidden-ssid-scan.patch
queue-4.3/mwifiex-fix-mwifiex_rdeeprom_read.patch
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