On Tue, Jun 11, 2024 at 06:03:50PM +0530, Sudeepgoud Patil wrote:
> Add smp2p irq devname which fetches remote name from respective
> smp2p dtsi node, which makes the wakeup source distinguishable
> in irq wakeup prints.
>
> Signed-off-by: Sudeepgoud Patil <quic_sudeepgo@xxxxxxxxxxx>
> ---
> drivers/soc/qcom/smp2p.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c
> index a21241cbeec7..a77fee048b38 100644
> --- a/drivers/soc/qcom/smp2p.c
> +++ b/drivers/soc/qcom/smp2p.c
> @@ -122,6 +122,7 @@ struct smp2p_entry {
> * @ssr_ack_enabled: SMP2P_FEATURE_SSR_ACK feature is supported and was enabled
> * @ssr_ack: current cached state of the local ack bit
> * @negotiation_done: whether negotiating finished
> + * @irq_devname: poniter to the smp2p irq devname
> * @local_pid: processor id of the inbound edge
> * @remote_pid: processor id of the outbound edge
> * @ipc_regmap: regmap for the outbound ipc
> @@ -146,6 +147,7 @@ struct qcom_smp2p {
> bool ssr_ack;
> bool negotiation_done;
>
> + char *irq_devname;
> unsigned local_pid;
> unsigned remote_pid;
>
> @@ -614,10 +616,16 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
> /* Kick the outgoing edge after allocating entries */
> qcom_smp2p_kick(smp2p);
>
> + smp2p->irq_devname = kasprintf(GFP_KERNEL, "%s", pdev->dev.of_node->name);
That's a lot of extra instructions for copying a string, which doesn't
need to be copied because of_node->name is const char and the argument
to devm_request_threaded_irq() is const char.
So, kstrdup_const() is what you're looking for.
You can then go devm_kstrdup_const() and avoid the kfree() (then
kfree_const()) below.
That said, looking at /proc/interrupts, I think it would make sense to
make this devm_kasprintf(..., "smp2p-%s", name);
Regards,
Bjorn
> + if (!smp2p->irq_devname) {
> + ret = -ENOMEM;
> + goto unwind_interfaces;
> + }
> +
> ret = devm_request_threaded_irq(&pdev->dev, irq,
> NULL, qcom_smp2p_intr,
> IRQF_ONESHOT,
> - "smp2p", (void *)smp2p);
> + smp2p->irq_devname, (void *)smp2p);
> if (ret) {
> dev_err(&pdev->dev, "failed to request interrupt\n");
> goto unwind_interfaces;
> @@ -650,6 +658,8 @@ static int qcom_smp2p_probe(struct platform_device *pdev)
> list_for_each_entry(entry, &smp2p->outbound, node)
> qcom_smem_state_unregister(entry->state);
>
> + kfree(smp2p->irq_devname);
> +
> smp2p->out->valid_entries = 0;
>
> release_mbox:
> @@ -677,6 +687,8 @@ static void qcom_smp2p_remove(struct platform_device *pdev)
>
> mbox_free_channel(smp2p->mbox_chan);
>
> + kfree(smp2p->irq_devname);
> +
> smp2p->out->valid_entries = 0;
> }
>
> --
>
