diff options
| author | Roger Quadros <rogerq@kernel.org> | 2024-02-27 11:23:48 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-05 13:23:17 +0000 |
| commit | 6661befe41009c210efa2c1bcd16a5cc4cff8a06 (patch) | |
| tree | de9104cb6941e815ee16051c883975b67f5a4011 /drivers/usb | |
| parent | 8d36c0e433e0807700fe967953f8b0beb0dc5159 (diff) | |
usb: dwc3-am62: fix module unload/reload behavior
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
We called of_platform_populate() in .probe() so call the
cleanup function of_platform_depopulate() in .remove().
Get rid of the now unnnecessary dwc3_ti_remove_core().
Without this, module re-load doesn't work properly.
Fixes: e8784c0aec03 ("drivers: usb: dwc3: Add AM62 USB wrapper driver")
Cc: stable@vger.kernel.org # v5.19+
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240227-for-v6-9-am62-usb-errata-3-0-v4-1-0ada8ddb0767@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-am62.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index 90a587bc29b7..f85603b7f7c5 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -267,21 +267,14 @@ err_pm_disable: return ret; } -static int dwc3_ti_remove_core(struct device *dev, void *c) -{ - struct platform_device *pdev = to_platform_device(dev); - - platform_device_unregister(pdev); - return 0; -} - static void dwc3_ti_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dwc3_am62 *am62 = platform_get_drvdata(pdev); u32 reg; - device_for_each_child(dev, NULL, dwc3_ti_remove_core); + pm_runtime_get_sync(dev); + of_platform_depopulate(dev); /* Clear mode valid bit */ reg = dwc3_ti_readl(am62, USBSS_MODE_CONTROL); @@ -289,7 +282,6 @@ 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); } |