On Thu, Nov 10, 2022 at 09:50:34AM +0800, Huisong Li wrote:
> Currently, 'pcc_chan_count' is a non-zero value if PCC subspaces are parsed
> successfully and subsequent processes is failure during initializing PCC
> process. This may cause that pcc_mbox_request_channel() can still be
> executed successfully , which will misleads the caller that this channel is
> available.
>
> Fixes: ce028702ddbc ("mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe")
> Signed-off-by: Huisong Li <lihuisong@xxxxxxxxxx>
> ---
> drivers/mailbox/pcc.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
> index 7cee37dd3b73..47d70c5884e3 100644
> --- a/drivers/mailbox/pcc.c
> +++ b/drivers/mailbox/pcc.c
> @@ -294,6 +294,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
> pr_err("Channel not found for idx: %d\n", subspace_id);
> return ERR_PTR(-EBUSY);
> }
> +
Spurious/not needed change ?
> dev = chan->mbox->dev;
>
> spin_lock_irqsave(&chan->lock, flags);
> @@ -735,7 +736,8 @@ static int __init pcc_init(void)
>
> if (ret) {
> pr_debug("ACPI PCC probe failed.\n");
> - return -ENODEV;
> + ret = -ENODEV;
> + goto out;
Not needed, we don't set pcc_chan_count if the probe failed.
> }
>
> pcc_pdev = platform_create_bundle(&pcc_mbox_driver,
> @@ -743,10 +745,13 @@ static int __init pcc_init(void)
>
> if (IS_ERR(pcc_pdev)) {
> pr_debug("Err creating PCC platform bundle\n");
> - return PTR_ERR(pcc_pdev);
> + ret = PTR_ERR(pcc_pdev);
You just need to set pcc_chan_count to 0 here, so no need for goto.
--
Regards,
Sudeep
