linux-kernel - [PATCH v2 2/3] VMCI: No need to clear memory after a dma_alloc

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Message-Id: <3e8c0bfaa77500e22d6c90f249da1c53dbae716e.1645734041.git.christophe.jaillet@wanadoo.fr>
Date:   Thu, 24 Feb 2022 21:22:27 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Jorgen Hansen <jhansen@...are.com>, Vishnu Dasa <vdasa@...are.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        pv-drivers@...are.com
Subject: [PATCH v2 2/3] VMCI: No need to clear memory after a dma_alloc_coherent() call

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@...adoo.fr>
Acked-by: Vishnu Dasa <vdasa@...are.com>
---
v2:
   - no change
---
 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