linux-kernel - [PATCH] brcmfmac: sdio: Increase the default timeouts a bit

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Message-Id: <1453718849-3508-1-git-send-email-sjoerd.simons@collabora.co.uk>
Date:	Mon, 25 Jan 2016 11:47:29 +0100
From:	Sjoerd Simons <sjoerd.simons@...labora.co.uk>
To:	Kalle Valo <kvalo@...eaurora.org>
Cc:	Paul Stewart <pstew@...omium.org>,
	Doug Anderson <dianders@...omium.org>,
	linux-rockchip@...ts.infradead.org,
	Arend van Spriel <arend@...adcom.com>,
	Pieter-Paul Giesberts <pieterpg@...adcom.com>,
	brcm80211-dev-list@...adcom.com, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hante Meuleman <meuleman@...adcom.com>,
	Brett Rudley <brudley@...adcom.com>, netdev@...r.kernel.org,
	"Franky (Zhenhui) Lin" <frankyl@...adcom.com>
Subject: [PATCH] brcmfmac: sdio: Increase the default timeouts a bit

On a Radxa Rock2 board with a Ampak AP6335 (Broadcom 4339 core) it seems
the card responds very quickly most of the time, unfortunately during
initialisation it sometimes seems to take just a bit over 2 seconds to
respond.

This results intialization failing with message like:
  brcmf_c_preinit_dcmds: Retreiving cur_etheraddr failed, -52
  brcmf_bus_start: failed: -52
  brcmf_sdio_firmware_callback: dongle is not responding

Increasing the timeout to allow for a bit more headroom allows the
card to initialize reliably.

A quick search online after diagnosing/fixing this showed that Google
has a similar patch in their ChromeOS tree, so this doesn't seem
specific to the board I'm using.

Signed-off-by: Sjoerd Simons <sjoerd.simons@...labora.co.uk>

---

 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index dd66143..75ac4bd 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -45,8 +45,8 @@
 #include "chip.h"
 #include "firmware.h"
 
-#define DCMD_RESP_TIMEOUT	msecs_to_jiffies(2000)
-#define CTL_DONE_TIMEOUT	msecs_to_jiffies(2000)
+#define DCMD_RESP_TIMEOUT	msecs_to_jiffies(2500)
+#define CTL_DONE_TIMEOUT	msecs_to_jiffies(2500)
 
 #ifdef DEBUG
 
-- 
2.7.0