From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] ARM: vfp: Always save VFP state in vfp_pm_suspend
Date: Tue, 15 Feb 2011 16:51:19 +0000 [thread overview]
Message-ID: <1297788679.28844.4.camel@e102109-lin.cambridge.arm.com> (raw)
In-Reply-To: <1297724147-6320-1-git-send-email-ccross@android.com>
On Mon, 2011-02-14 at 22:55 +0000, Colin Cross wrote:
> vfp_pm_suspend should save the VFP state any time there is
> a last_VFP_context. If it only saves when the VFP is enabled,
> the state can get lost when, on a UP system:
> Thread 1 uses the VFP
> Context switch occurs to thread 2, VFP is disabled but the
> VFP context is not saved to allow lazy save and restore
> Thread 2 initiates suspend
> vfp_pm_suspend is called with the VFP disabled, but the
> context has not been saved.
>
> Modify vfp_pm_suspend to save the VFP context whenever
> last_VFP_context is set.
>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2011-02-15 16:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-13 23:13 [PATCH] ARM: vfp: Always save VFP state in vfp_pm_suspend Colin Cross
2011-02-14 11:42 ` Catalin Marinas
2011-02-14 18:35 ` Colin Cross
2011-02-14 22:55 ` [PATCH v2] " Colin Cross
2011-02-15 16:51 ` Catalin Marinas [this message]
2011-02-15 17:03 ` Russell King - ARM Linux
2011-02-16 19:36 ` Colin Cross
2011-02-20 12:57 ` Russell King - ARM Linux
2011-02-20 18:43 ` Colin Cross
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