From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 2/2] iommu/amd: Fix crash when accessing AMD-Vi sysfs entries Date: Tue, 28 Feb 2017 15:10:19 +0100 Message-ID: <1488291019-13836-2-git-send-email-joro@8bytes.org> References: <1488291019-13836-1-git-send-email-joro@8bytes.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1488291019-13836-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: Joerg Roedel , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org From: Joerg Roedel The link between the iommu sysfs-device and the struct amd_iommu is no longer stored as driver-data. Update the code to the new correct way of getting from device to amd_iommu. Reported-by: Dave Jones Fixes: 39ab9555c241 ('iommu: Add sysfs bindings for struct iommu_device') Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu_init.c | 4 ++-- drivers/iommu/amd_iommu_types.h | 5 +++++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 04cdac7..6130278 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1507,7 +1507,7 @@ static ssize_t amd_iommu_show_cap(struct device *dev, struct device_attribute *attr, char *buf) { - struct amd_iommu *iommu = dev_get_drvdata(dev); + struct amd_iommu *iommu = dev_to_amd_iommu(dev); return sprintf(buf, "%x\n", iommu->cap); } static DEVICE_ATTR(cap, S_IRUGO, amd_iommu_show_cap, NULL); @@ -1516,7 +1516,7 @@ static ssize_t amd_iommu_show_features(struct device *dev, struct device_attribute *attr, char *buf) { - struct amd_iommu *iommu = dev_get_drvdata(dev); + struct amd_iommu *iommu = dev_to_amd_iommu(dev); return sprintf(buf, "%llx\n", iommu->features); } static DEVICE_ATTR(features, S_IRUGO, amd_iommu_show_features, NULL); diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h index af00f38..003f3ce 100644 --- a/drivers/iommu/amd_iommu_types.h +++ b/drivers/iommu/amd_iommu_types.h @@ -569,6 +569,11 @@ struct amd_iommu { volatile u64 __aligned(8) cmd_sem; }; +static inline struct amd_iommu *dev_to_amd_iommu(struct device *dev) +{ + return container_of(dev, struct amd_iommu, iommu.dev); +} + #define ACPIHID_UID_LEN 256 #define ACPIHID_HID_LEN 9 -- 1.9.1