iommu/amd: Correct the wrong setting of alias DTE in do_attach

In below commit alias DTE is set when its peripheral is
setting DTE. However there's a code bug here to wrongly
set the alias DTE, correct it in this patch.

commit e25bfb56ea7f046b71414e02f80f620deb5c6362
Author: Joerg Roedel <jroedel@suse.de>
Date:   Tue Oct 20 17:33:38 2015 +0200

    iommu/amd: Set alias DTE in do_attach/do_detach

Signed-off-by: Baoquan He <bhe@redhat.com>
Tested-by: Mark Hounschell <markh@compro.net>
Cc: stable@vger.kernel.org # v4.4
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 539b0de..e5e2239 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2049,7 +2049,7 @@ static void do_attach(struct iommu_dev_data *dev_data,
        /* Update device table */
        set_dte_entry(dev_data->devid, domain, ats);
        if (alias != dev_data->devid)
-               set_dte_entry(dev_data->devid, domain, ats);
+               set_dte_entry(alias, domain, ats);
 
        device_flush_dte(dev_data);
 }