diff options
| author | Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> | 2026-07-30 13:02:14 +0530 |
|---|---|---|
| committer | Rob Herring (Arm) <robh@kernel.org> | 2026-08-11 16:54:37 -0500 |
| commit | b71ace1a003e57886ee65c21cab052d404c5b049 (patch) | |
| tree | 6baa40def14a266f742f4566c7ca7024e19a807d /drivers/of | |
| parent | f423482666be05c5f74f2a75caee04aa493d524c (diff) | |
of: reserved_mem: Introduce devres-managed initialization function
Introduce devres-based helper for of_reserved_mem_device_init()
to help fight dangling references and ever so slightly reduce the
number of boilerplate deinitialization calls.
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://patch.msgid.link/20260730073214.1146432-1-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/of_reserved_mem.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 9ce55bfd7e2a..5f441a684567 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -788,6 +788,50 @@ void of_reserved_mem_device_release(struct device *dev) } EXPORT_SYMBOL_GPL(of_reserved_mem_device_release); +static void devm_of_reserved_mem_device_release(struct device *dev, void *res) +{ + of_reserved_mem_device_release(*(struct device **)res); +} + +static int devm_of_reserved_mem_device_init_by_idx(struct device *dev, + struct device_node *np, int idx) +{ + struct device **ptr; + int ret; + + ptr = devres_alloc(devm_of_reserved_mem_device_release, sizeof(*ptr), + GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = of_reserved_mem_device_init_by_idx(dev, np, idx); + if (ret) { + devres_free(ptr); + return ret; + } + + *ptr = dev; + devres_add(dev, ptr); + + return 0; +} + +/** + * devm_of_reserved_mem_device_init() - Resource managed of_reserved_mem_device_init() + * @dev: Pointer to the device to configure + * + * This is a resource managed version of of_reserved_mem_device_init(). + * The reserved memory region will be released automatically when the device + * is unbound. + * + * Returns: Negative errno on failure or zero on success. + */ +int devm_of_reserved_mem_device_init(struct device *dev) +{ + return devm_of_reserved_mem_device_init_by_idx(dev, dev->of_node, 0); +} +EXPORT_SYMBOL_GPL(devm_of_reserved_mem_device_init); + /** * of_reserved_mem_lookup() - acquire reserved_mem from a device node * @np: node pointer of the desired reserved-memory region |