Re: [PATCH 2/3] VMCI: No need to clear memory after a dma_alloc_coherent() call

[Vishnu Dasa <vdasa@vmware.com>]

> On Feb 10, 2022, at 2:27 PM, Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote:
> 
> dma_alloc_coherent() already clear the allocated memory, there is no need
> to explicitly call memset().
> This saves a few cycles and a few lines of code.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> drivers/misc/vmw_vmci/vmci_guest.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c
> index 1a1858742f75..02d4722d8474 100644
> --- a/drivers/misc/vmw_vmci/vmci_guest.c
> +++ b/drivers/misc/vmw_vmci/vmci_guest.c
> @@ -706,13 +706,11 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
> 		vmci_dev->notification_bitmap = dma_alloc_coherent(
> 			&pdev->dev, PAGE_SIZE, &vmci_dev->notification_base,
> 			GFP_KERNEL);
> -		if (!vmci_dev->notification_bitmap) {
> +		if (!vmci_dev->notification_bitmap)
> 			dev_warn(&pdev->dev,
> 				 "Unable to allocate notification bitmap\n");
> -		} else {
> -			memset(vmci_dev->notification_bitmap, 0, PAGE_SIZE);
> +		else
> 			caps_in_use |= VMCI_CAPS_NOTIFICATIONS;
> -		}
> 	}
> 
> 	if (mmio_base != NULL) {
> -- 
> 2.32.0
> 

Thanks!

Acked-by: Vishnu Dasa <vdasa@vmware.com>