linux-kernel - Re: [PATCH v2] soc: rockchip: avoid infinite loop for power domain

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Date:   Wed, 02 Nov 2016 00:22:13 +0100
From:   Heiko Stuebner <heiko@...ech.de>
To:     Caesar Wang <wxt@...k-chips.com>
Cc:     khilman@...aro.org, zhangqing@...k-chips.com,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        tfiga@...omium.org
Subject: Re: [PATCH v2] soc: rockchip: avoid infinite loop for power domain

Am Donnerstag, 13. Oktober 2016, 02:16:08 CET schrieb Caesar Wang:
> In some cases, we have met the infinite loop in
> rockchip_pmu_set_idle_request() or rockchip_do_pmu_set_power_domain().
> 
> As the crosbug.com/p/57351 reported, the boot hangs right after this
> [1.629163] bootconsole [uart8250] disabled
> [1.639286] [drm:drm_core_init] Initialized drm 1.1.0 20060810
> [1.645926] [drm:drm_get_platform_dev] Initialized vgem 1.0.0 20120112..
> [1.654558] iommu: Adding device ff8f0000.vop to group 0
> [1.660569] iommu: Adding device ff900000.vop to group 1
> <hang>
> 
> This patch adds the error message and timeout to avoid infinite loop if
> it fails to get the ack.
> 
> Signed-off-by: Caesar Wang <wxt@...k-chips.com>

applied to by drivers-branch for 4.10


Thanks
Heiko