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id 1W7bQI-000GgL-Md; Sun, 26 Jan 2014 20:55:39 -0500
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From: Sujith Manoharan <sujith@msujith.org>
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Message-ID: <21221.47960.726835.615315@gargle.gargle.HOWL>
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Date: Mon, 27 Jan 2014 07:20:16 +0530
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To: Josh Boyer <jwboyer@fedoraproject.org>
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Cc: "John W. Linville" <linville@tuxdriver.com>,
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<ath9k-devel@venema.h4ckr.net>, netdev <netdev@vger.kernel.org>,
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"Linux-Kernel\@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
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Subject: Re: ath9k ARM build error with v3.13-8330-g4ba9920
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In-Reply-To: <CA+5PVA4fnCo8anT0HZCVu4+AFAseibm=0yD8nL3Lm7Q5dA-qZQ@mail.gmail.com>
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References: <CA+5PVA4fnCo8anT0HZCVu4+AFAseibm=0yD8nL3Lm7Q5dA-qZQ@mail.gmail.com>
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X-Scanned-By: MIMEDefang 2.68 on 10.5.110.16
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Josh Boyer wrote:
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> adds a udelay(10000) call to the ath9k driver. This will cause a
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> build error on various ARM configs because the value passed to udelay
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> is too large:
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>
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> ERROR: "__bad_udelay" [drivers/net/wireless/ath/ath9k/ath9k_hw.ko] undefined!
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> make[1]: *** [__modpost] Error 1
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> make: *** [modules] Error 2
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>
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> Is the 10000 microsecond udelay really required? I believe the limit
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> on ARM is 2000. Perhaps something else could be done in this case?
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The delay is a workaround for a HW issue. Does this patch fix the problem ?
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diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
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index fbf43c0..11eab9f 100644
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--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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@@ -1316,7 +1316,7 @@ static bool ath9k_hw_set_reset(struct ath_hw *ah, int type)
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if (AR_SREV_9300_20_OR_LATER(ah))
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udelay(50);
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else if (AR_SREV_9100(ah))
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- udelay(10000);
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+ mdelay(10);
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else
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udelay(100);
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@@ -2051,9 +2051,8 @@ static bool ath9k_hw_set_power_awake(struct ath_hw *ah)
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REG_SET_BIT(ah, AR_RTC_FORCE_WAKE,
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AR_RTC_FORCE_WAKE_EN);
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-
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if (AR_SREV_9100(ah))
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- udelay(10000);
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+ mdelay(10);
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else
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udelay(50);
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Sujith
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