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usb: chipidea: fix usage_count leak when autosuspend_delay is negative

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JIRA: https://redhat.atlassian.net/browse/RHEL-248519

commit fc3afb5728e297994863f8a2a01b88a920bbf53e
Author: Xu Yang <xu.yang_2@nxp.com>
Date:   Thu Jul 16 18:41:26 2026 +0800

    usb: chipidea: fix usage_count leak when autosuspend_delay is negative
    
    The probe() calls pm_runtime_use_autosuspend(), but remove() does not call
    pm_runtime_dont_use_autosuspend(). This can lead to a usage_count leak if
    autosuspend_delay is set to a negative value.
    
    The pm_runtime_use_autosuspend() also notes that it's important to undo
    this with pm_runtime_dont_use_autosuspend() at driver exit time.
    
    Fixes: 1f874edcb7 ("usb: chipidea: add runtime power management support")
    Cc: stable <stable@kernel.org>
    Assisted-by: Claude:claude-sonnet-4.6
    Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
    Reviewed-by: Frank Li <Frank.Li@nxp.com>
    Link: https://patch.msgid.link/20260716104126.2763454-1-xu.yang_2@oss.nxp.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Jared Kangas <jkangas@redhat.com>
This commit is contained in:
Jared Kangas
2026-08-25 12:07:27 -07:00
parent 51bc221980
commit 28265fc4cd
1 changed files with 1 additions and 0 deletions
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drivers/usb/chipidea/core.c
+1
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@@ -1250,6 +1250,7 @@ static void ci_hdrc_remove(struct platform_device *pdev)
usb_role_switch_unregister(ci->role_switch);
if (ci->supports_runtime_pm) {
pm_runtime_dont_use_autosuspend(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put_noidle(&pdev->dev);