Hi,
On 6/10/22 21:23, Chris Lew wrote:
> To mirror the exported rproc_add_carveout(), add a rproc_del_carveout()
> so memory carveout resources added by devices outside of remoteproc can
> manage the resource lifetime more accurately.
>
> Signed-off-by: Chris Lew <quic_clew@xxxxxxxxxxx>
> ---
> drivers/remoteproc/remoteproc_core.c | 20 ++++++++++++++++++++
> include/linux/remoteproc.h | 1 +
> 2 files changed, 21 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 02a04ab34a23..ee71fccae970 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1001,6 +1001,26 @@ void rproc_add_carveout(struct rproc *rproc, struct rproc_mem_entry *mem)
> EXPORT_SYMBOL(rproc_add_carveout);
>
> /**
> + * rproc_del_carveout() - remove an allocated carveout region
> + * @rproc: rproc handle
> + * @mem: memory entry to register
> + *
> + * This function removes specified memory entry in @rproc carveouts list.
> + */
> +void rproc_del_carveout(struct rproc *rproc, struct rproc_mem_entry *mem)
> +{
> + struct rproc_mem_entry *entry, *tmp;
> +
> + list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
> + if (entry == mem) {
> + list_del(&mem->node);
> + return;
> + }
> + }
> +}
> +EXPORT_SYMBOL(rproc_del_carveout);
This API seems to me quite dangerous because it can be called while carveouts are in use.
At least some checks should be added...
What about using rproc_resource_cleanup instead?
Regards,
Arnaud
> +
> +/**
> * rproc_mem_entry_init() - allocate and initialize rproc_mem_entry struct
> * @dev: pointer on device struct
> * @va: virtual address
> diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
> index 7c943f0a2fc4..43112aa78ffe 100644
> --- a/include/linux/remoteproc.h
> +++ b/include/linux/remoteproc.h
> @@ -658,6 +658,7 @@ struct rproc *devm_rproc_alloc(struct device *dev, const char *name,
> int devm_rproc_add(struct device *dev, struct rproc *rproc);
>
> void rproc_add_carveout(struct rproc *rproc, struct rproc_mem_entry *mem);
> +void rproc_del_carveout(struct rproc *rproc, struct rproc_mem_entry *mem);
>
> struct rproc_mem_entry *
> rproc_mem_entry_init(struct device *dev,
