From: Thierry Reding <thierry.reding@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mathias Nyman <mathias.nyman@intel.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>,
linux-usb@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: xhci: tegra: Prevent error pointer dereference
Date: Wed, 20 Feb 2019 14:48:41 +0100 [thread overview]
Message-ID: <20190220134841.7642-1-thierry.reding@gmail.com> (raw)
From: Thierry Reding <treding@nvidia.com>
During initialization, the host and super-speed power domains will
contain an ERR_PTR() encoded error code rather than being NULL. To
avoid a crash, use a !IS_ERR_OR_NULL() condition during cleanup.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
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 938ff06c0349..efb0cad8710e 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -941,9 +941,9 @@ static void tegra_xusb_powerdomain_remove(struct device *dev,
device_link_del(tegra->genpd_dl_ss);
if (tegra->genpd_dl_host)
device_link_del(tegra->genpd_dl_host);
- if (tegra->genpd_dev_ss)
+ if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss))
dev_pm_domain_detach(tegra->genpd_dev_ss, true);
- if (tegra->genpd_dev_host)
+ if (!IS_ERR_OR_NULL(tegra->genpd_dev_host))
dev_pm_domain_detach(tegra->genpd_dev_host, true);
}
next reply other threads:[~2019-02-20 13:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 13:48 Thierry Reding [this message]
-- strict thread matches above, loose matches on Subject: below --
2019-02-20 14:41 xhci: tegra: Prevent error pointer dereference Jon Hunter
2019-02-20 16:16 Greg Kroah-Hartman
2019-02-20 16:27 Thierry Reding
2019-02-20 16:31 Greg Kroah-Hartman
2019-02-20 16:36 Mathias Nyman
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