From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baoquan He Subject: [PATCH 08/10] iommu/amd: Do not update the information of domain to devtables before device driver init Date: Thu, 24 Sep 2015 14:37:34 +0800 Message-ID: <1443076656-31776-9-git-send-email-bhe@redhat.com> References: <1443076656-31776-1-git-send-email-bhe@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1443076656-31776-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@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: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org update_domain() is the only place where domain->pt_root will be got and set into dev entry. So before the device driver initialization we do nothing if it's in previously enabled translation status. Signed-off-by: Baoquan He --- drivers/iommu/amd_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 0d59f79..aee1ae4 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2350,7 +2350,7 @@ static void update_device_table(struct protection_domain *domain) static void update_domain(struct protection_domain *domain) { - if (!domain->updated) + if (!domain->updated || translation_pre_enabled()) return; update_device_table(domain); -- 2.4.0