linux-kernel - [patch 1/3 v2] vfio: signedness bug in vfio_config_do

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Date:	Thu, 28 Jun 2012 11:07:25 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Alex Williamson <alex.williamson@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, walter harms <wharms@....de>
Subject: [patch 1/3 v2] vfio: signedness bug in vfio_config_do_rw()

The "count" variable needs to be signed here because we use it to store
negative error codes.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
v2: Just declare count as signed.

diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index a4f7321..2e00aa8 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -1419,7 +1419,7 @@ void vfio_config_free(struct vfio_pci_device *vdev)
 }
 
 static ssize_t vfio_config_do_rw(struct vfio_pci_device *vdev, char __user *buf,
-				 size_t count, loff_t *ppos, bool iswrite)
+				 ssize_t count, loff_t *ppos, bool iswrite)
 {
 	struct pci_dev *pdev = vdev->pdev;
 	struct perm_bits *perm;
--
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