linux-kernel - [patch] iommu/amd: Signedness bug in acpihid_device

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Date:	Mon, 11 Apr 2016 10:14:46 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Joerg Roedel <joro@...tes.org>, Wan Zongshun <Vincent.Wan@....com>
Cc:	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] iommu/amd: Signedness bug in acpihid_device_group()

"devid" needs to be signed for the error handling to work.

Fixes:b097d11a0fa3f ('iommu/amd: Manage iommu_group for ACPI HID devices')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index c430c10..12f7779 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -283,7 +283,7 @@ static struct iommu_dev_data *get_dev_data(struct device *dev)
 static struct iommu_group *acpihid_device_group(struct device *dev)
 {
 	struct acpihid_map_entry *p, *entry = NULL;
-	u16 devid;
+	int devid;
 
 	devid = get_acpihid_device_id(dev, &entry);
 	if (devid < 0)