From: Zhang Qilong <zhangqilong3@huawei.com>
To: <gregkh@linuxfoundation.org>, <mathias.nyman@intel.com>,
<thierry.reding@gmail.com>, <jonathanh@nvidia.com>
Cc: <linux-usb@vger.kernel.org>, <linux-tegra@vger.kernel.org>
Subject: [PATCH -next v2] usb: xhci: tegra:Fix PM usage reference leak of tegra_xusb_unpowergate_partitions
Date: Sat, 19 Mar 2022 10:38:22 +0800 [thread overview]
Message-ID: <20220319023822.145641-1-zhangqilong3@huawei.com> (raw)
From: zhangqilong <zhangqilong3@huawei.com>
pm_runtime_get_sync will increment pm usage counter
even it failed. Forgetting to putting operation will
result in reference leak here. We fix it by replacing
it with pm_runtime_resume_and_get to keep usage counter
balanced.
Fixes:41a7426d25fa3 ("usb: xhci: tegra: Unlink power domain devices")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
---
v2:
- Fix commit id
---
drivers/usb/host/xhci-tegra.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index c8af2cd2216d..996958a6565c 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1034,13 +1034,13 @@ static int tegra_xusb_unpowergate_partitions(struct tegra_xusb *tegra)
int rc;
if (tegra->use_genpd) {
- rc = pm_runtime_get_sync(tegra->genpd_dev_ss);
+ rc = pm_runtime_resume_and_get(tegra->genpd_dev_ss);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB SS partition\n");
return rc;
}
- rc = pm_runtime_get_sync(tegra->genpd_dev_host);
+ rc = pm_runtime_resume_and_get(tegra->genpd_dev_host);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB Host partition\n");
pm_runtime_put_sync(tegra->genpd_dev_ss);
--
2.31.1
reply other threads:[~2022-03-19 2:38 UTC|newest]
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