6ff8a2e28f
fbafc3e621/Documentation/networking/device_drivers/wwan/t7xx.rst
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From e3d6d152a1cbdee25f2e3962009a2751b54e2297 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Kornel=20Dul=C4=99ba?= <mindal@semihalf.com>
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Date: Thu, 26 Jan 2023 13:25:35 +0000
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Subject: [PATCH] net: wwan: t7xx: Fix Runtime PM initialization
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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For PCI devices the Runtime PM refcount is incremented twice:
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1. During device enumeration with a call to pm_runtime_forbid.
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2. Just before a driver probe logic is called.
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Because of that in order to enable Runtime PM on a given device
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we have to call both pm_runtime_allow and pm_runtime_put_noidle,
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once it's ready to be runtime suspended.
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The former was missing causing the pm refcount to never reach 0.
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Fixes: d10b3a695ba0 ("net: wwan: t7xx: Runtime PM")
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Signed-off-by: Kornel Dulęba <mindal@semihalf.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/wwan/t7xx/t7xx_pci.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/net/wwan/t7xx/t7xx_pci.c
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+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
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@@ -121,6 +121,8 @@ void t7xx_pci_pm_init_late(struct t7xx_p
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iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + ENABLE_ASPM_LOWPWR);
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atomic_set(&t7xx_dev->md_pm_state, MTK_PM_RESUMED);
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+ pm_runtime_mark_last_busy(&t7xx_dev->pdev->dev);
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+ pm_runtime_allow(&t7xx_dev->pdev->dev);
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pm_runtime_put_noidle(&t7xx_dev->pdev->dev);
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}
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