diff options
| author | Sakari Ailus <sakari.ailus@linux.intel.com> | 2017-07-13 11:23:44 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-05-29 16:39:52 -0400 |
| commit | 814434984a5d2063ac15d7ff9a46075600ff1805 (patch) | |
| tree | 8af7d90fa15ffab53c2501df67a6c35c9311ee3d /drivers/media/platform/omap3isp/isph3a_af.c | |
| parent | f42292040d31922ee4e4ea68e2f287fbc3bb2053 (diff) | |
media: omap3isp: Don't rely on devm for memory resource management
devm functions are fine for managing resources that are directly related
to the device at hand and that have no other dependencies. However, a
process holding a file handle to a device created by a driver for a device
may result in the file handle left behind after the device is long gone.
This will result in accessing released (and potentially reallocated)
memory.
Instead, manage the memory resources in the driver. Releasing the
resources can be later on bound to e.g. by releasing a reference.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/platform/omap3isp/isph3a_af.c')
| -rw-r--r-- | drivers/media/platform/omap3isp/isph3a_af.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/media/platform/omap3isp/isph3a_af.c b/drivers/media/platform/omap3isp/isph3a_af.c index 4da25c84f0c6..843ec1dc5c9d 100644 --- a/drivers/media/platform/omap3isp/isph3a_af.c +++ b/drivers/media/platform/omap3isp/isph3a_af.c @@ -354,9 +354,10 @@ int omap3isp_h3a_af_init(struct isp_device *isp) { struct ispstat *af = &isp->isp_af; struct omap3isp_h3a_af_config *af_cfg; - struct omap3isp_h3a_af_config *af_recover_cfg; + struct omap3isp_h3a_af_config *af_recover_cfg = NULL; + int ret; - af_cfg = devm_kzalloc(isp->dev, sizeof(*af_cfg), GFP_KERNEL); + af_cfg = kzalloc(sizeof(*af_cfg), GFP_KERNEL); if (af_cfg == NULL) return -ENOMEM; @@ -366,12 +367,12 @@ int omap3isp_h3a_af_init(struct isp_device *isp) af->isp = isp; /* Set recover state configuration */ - af_recover_cfg = devm_kzalloc(isp->dev, sizeof(*af_recover_cfg), - GFP_KERNEL); + af_recover_cfg = kzalloc(sizeof(*af_recover_cfg), GFP_KERNEL); if (!af_recover_cfg) { dev_err(af->isp->dev, "AF: cannot allocate memory for recover configuration.\n"); - return -ENOMEM; + ret = -ENOMEM; + goto err; } af_recover_cfg->paxel.h_start = OMAP3ISP_AF_PAXEL_HZSTART_MIN; @@ -383,13 +384,22 @@ int omap3isp_h3a_af_init(struct isp_device *isp) if (h3a_af_validate_params(af, af_recover_cfg)) { dev_err(af->isp->dev, "AF: recover configuration is invalid.\n"); - return -EINVAL; + ret = -EINVAL; + goto err; } af_recover_cfg->buf_size = h3a_af_get_buf_size(af_recover_cfg); af->recover_priv = af_recover_cfg; - return omap3isp_stat_init(af, "AF", &h3a_af_subdev_ops); + ret = omap3isp_stat_init(af, "AF", &h3a_af_subdev_ops); + +err: + if (ret) { + kfree(af_cfg); + kfree(af_recover_cfg); + } + + return ret; } void omap3isp_h3a_af_cleanup(struct isp_device *isp) |