linux-kernel - [ 064/187] ath9k_hw: avoid possible infinite loop in ar9003_get_pll_sqsum

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Message-Id: <20120712191528.336775659@linuxfoundation.org>
Date:	Thu, 12 Jul 2012 15:33:40 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Rolf Offermanns <rolf.offermanns@....net>,
	Sujith Manoharan <c_manoha@....qualcomm.com>,
	Senthil Balasubramanian <senthilb@....qualcomm.com>,
	Mohammed Shafi Shajakhan <mohammed@....qualcomm.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [ 064/187] ath9k_hw: avoid possible infinite loop in ar9003_get_pll_sqsum_dvc

From: Greg KH <gregkh@...uxfoundation.org>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mohammed Shafi Shajakhan <mohammed@....qualcomm.com>

commit f18e3c6b67f448ec47b3a5b242789bd3d5644879 upstream.

"ath9k: Fix softlockup in AR9485" with commit id
64bc1239c790e051ff677e023435d770d2ffa174 fixed the reported
issue, yet its better to avoid the possible infinite loop
in ar9003_get_pll_sqsum_dvc by having a timeout as suggested
by ath9k maintainers.
http://www.spinics.net/lists/linux-wireless/msg92126.html.
Based on my testing PLL's locking measurement is done in
~200us (2 iterations).

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