diff options
| author | Marek Vasut <marex@denx.de> | 2024-01-19 02:47:41 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2024-02-14 10:26:11 +0100 |
| commit | d9e473513930836e617f36c066f205a9a0c4450a (patch) | |
| tree | 65fd499f4a9a59358cf59a833e7717a857b1844d /drivers/pmdomain | |
| parent | pmdomain: ti: Add a null pointer check to the omap_prm_domain_init (diff) | |
| download | linux-d9e473513930836e617f36c066f205a9a0c4450a.tar.xz linux-d9e473513930836e617f36c066f205a9a0c4450a.zip | |
pmdomain: imx8mp-blk-ctrl: Error out if domains are missing in DT
This driver assumes that domain->power_dev is non-NULL in its
suspend/resume path. The assumption is valid, since all the devices that
are being looked up here should be described in DT. In case they are not
described in DT, because the DT is faulty, suspend/resume attempt would
trigger NULL pointer dereference.
To avoid this failure, check whether the power_dev assignment is not NULL
right away in probe callback and fail early if it is.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240119014807.268694-1-marex@denx.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/pmdomain')
| -rw-r--r-- | drivers/pmdomain/imx/imx8m-blk-ctrl.c | 9 | ||||
| -rw-r--r-- | drivers/pmdomain/imx/imx8mp-blk-ctrl.c | 9 |
2 files changed, 12 insertions, 6 deletions
diff --git a/drivers/pmdomain/imx/imx8m-blk-ctrl.c b/drivers/pmdomain/imx/imx8m-blk-ctrl.c index 1341a707f61b..ca942d7929c2 100644 --- a/drivers/pmdomain/imx/imx8m-blk-ctrl.c +++ b/drivers/pmdomain/imx/imx8m-blk-ctrl.c @@ -258,11 +258,14 @@ static int imx8m_blk_ctrl_probe(struct platform_device *pdev) domain->power_dev = dev_pm_domain_attach_by_name(dev, data->gpc_name); - if (IS_ERR(domain->power_dev)) { - dev_err_probe(dev, PTR_ERR(domain->power_dev), + if (IS_ERR_OR_NULL(domain->power_dev)) { + if (!domain->power_dev) + ret = -ENODEV; + else + ret = PTR_ERR(domain->power_dev); + dev_err_probe(dev, ret, "failed to attach power domain \"%s\"\n", data->gpc_name); - ret = PTR_ERR(domain->power_dev); goto cleanup_pds; } diff --git a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c index e3203eb6a022..e488cf79b800 100644 --- a/drivers/pmdomain/imx/imx8mp-blk-ctrl.c +++ b/drivers/pmdomain/imx/imx8mp-blk-ctrl.c @@ -687,11 +687,14 @@ static int imx8mp_blk_ctrl_probe(struct platform_device *pdev) domain->power_dev = dev_pm_domain_attach_by_name(dev, data->gpc_name); - if (IS_ERR(domain->power_dev)) { - dev_err_probe(dev, PTR_ERR(domain->power_dev), + if (IS_ERR_OR_NULL(domain->power_dev)) { + if (!domain->power_dev) + ret = -ENODEV; + else + ret = PTR_ERR(domain->power_dev); + dev_err_probe(dev, ret, "failed to attach power domain %s\n", data->gpc_name); - ret = PTR_ERR(domain->power_dev); goto cleanup_pds; } |