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Message-Id: <20240205141221.56076-3-rogerq@kernel.org>
Date: Mon, 5 Feb 2024 16:12:18 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Thinh.Nguyen@...opsys.com
Cc: gregkh@...uxfoundation.org,
r-gunasekaran@...com,
b-liu@...com,
afd@...com,
nm@...com,
srk@...com,
linux-usb@...r.kernel.org,
linux-kernel@...r.kernel.org,
Roger Quadros <rogerq@...nel.org>
Subject: [PATCH v2 2/5] usb: dwc3-am62: fix error on module removal
As runtime PM is enabled, the module can be runtime
suspended when .remove() is called.
Do a pm_runtime_get_sync() to make sure module is active
before doing any register operations.
Doing a pm_runtime_put_sync() should disable the refclk
so no need to disable it again.
Fixes the below warning at module removel.
[ 39.705310] ------------[ cut here ]------------
[ 39.710004] clk:162:3 already disabled
[ 39.713941] WARNING: CPU: 0 PID: 921 at drivers/clk/clk.c:1090 clk_core_disable+0xb0/0xb8
Signed-off-by: Roger Quadros <rogerq@...nel.org>
---
Notes:
Changelog:
v2: no change
v1: https://lore.kernel.org/all/20240201121220.5523-3-rogerq@kernel.org/
drivers/usb/dwc3/dwc3-am62.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c
index 1bfc9e67614f..600ba9cfefea 100644
--- a/drivers/usb/dwc3/dwc3-am62.c
+++ b/drivers/usb/dwc3/dwc3-am62.c
@@ -273,6 +273,11 @@ static void dwc3_ti_remove(struct platform_device *pdev)
struct dwc3_am62 *am62 = platform_get_drvdata(pdev);
u32 reg;
+ pm_runtime_get_sync(dev);
+
+ device_wakeup_disable(dev);
+ device_set_wakeup_capable(dev, false);
+
of_platform_depopulate(dev);
/* Clear mode valid bit */
@@ -281,7 +286,6 @@ static void dwc3_ti_remove(struct platform_device *pdev)
dwc3_ti_writel(am62, USBSS_MODE_CONTROL, reg);
pm_runtime_put_sync(dev);
- clk_disable_unprepare(am62->usb2_refclk);
pm_runtime_disable(dev);
pm_runtime_set_suspended(dev);
}
--
2.34.1
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