Re: [PATCH] PCI: endpoint: pci-epf-vntb: Add missing check for alloc_workqueue

[Manivannan Sadhasivam <mani@kernel.org>]

On Wed, Jan 04, 2023 at 05:08:08PM +0800, Jiasheng Jiang wrote:
> Add check for the return value of alloc_workqueue since it may return
> NULL pointer.
> 
> Fixes: e35f56bb0330 ("PCI: endpoint: Support NTB transfer between RC and EP")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

- Mani

> ---
>  drivers/pci/endpoint/functions/pci-epf-vntb.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> index 04698e7995a5..05c99185ba65 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> @@ -1441,6 +1441,9 @@ static int __init epf_ntb_init(void)
>  
>  	kpcintb_workqueue = alloc_workqueue("kpcintb", WQ_MEM_RECLAIM |
>  					    WQ_HIGHPRI, 0);
> +	if (!kpcintb_workqueue)
> +		return -ENOMEM;
> +
>  	ret = pci_epf_register_driver(&epf_ntb_driver);
>  	if (ret) {
>  		destroy_workqueue(kpcintb_workqueue);
> -- 
> 2.25.1
> 

-- 
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