diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-02-20 16:48:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-20 19:55:04 +0300 |
| commit | 0326ccb5feac6eac35ba6254260e2774277cd976 (patch) | |
| tree | 60f3db9ca8a5bd894e6ee51d5c4a47e467cab2c5 /drivers/usb/host | |
| parent | 79595a734a68f768774d3e9ad6b5ad994413c578 (diff) | |
| download | linux-0326ccb5feac6eac35ba6254260e2774277cd976.tar.xz | |
xhci: tegra: Prevent error pointer dereference
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>
Fixes: 6494a9ad86de ("usb: xhci: tegra: Add genpd support")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-tegra.c | 4 |
1 files 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); } |