diff mbox series

[v5,09/23] libxl: remove unnecessary check from libxl__device_pci_add()

Message ID 20201203142534.4017-10-paul@xen.org (mailing list archive)
State Superseded
Headers show
Series xl / libxl: named PCI pass-through devices | expand

Commit Message

Paul Durrant Dec. 3, 2020, 2:25 p.m. UTC 
From: Paul Durrant <pdurrant@amazon.com>

The code currently checks explicitly whether the device is already assigned,
but this is actually unnecessary as assigned devices do not form part of
the list returned by libxl_device_pci_assignable_list() and hence the
libxl_pci_assignable() test would have already failed.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
---
Cc: Ian Jackson <iwj@xenproject.org>
Cc: Wei Liu <wl@xen.org>
---
 tools/libs/light/libxl_pci.c | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

Comments

Wei Liu Dec. 4, 2020, 11:22 a.m. UTC | #1 
On Thu, Dec 03, 2020 at 02:25:20PM +0000, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@amazon.com>
> 
> The code currently checks explicitly whether the device is already assigned,
> but this is actually unnecessary as assigned devices do not form part of
> the list returned by libxl_device_pci_assignable_list() and hence the
> libxl_pci_assignable() test would have already failed.
> 
> Signed-off-by: Paul Durrant <pdurrant@amazon.com>
> Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>

Acked-by: Wei Liu <wl@xen.org>
diff mbox series

Patch

diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c
index 57cf6ffc85de..24e79afcaa36 100644
--- a/tools/libs/light/libxl_pci.c
+++ b/tools/libs/light/libxl_pci.c
@@ -1555,8 +1555,7 @@  void libxl__device_pci_add(libxl__egc *egc, uint32_t domid,
 {
     STATE_AO_GC(aodev->ao);
     libxl_ctx *ctx = libxl__gc_owner(gc);
-    libxl_device_pci *assigned;
-    int num_assigned, rc;
+    int rc;
     int stubdomid = 0;
     pci_add_state *pas;
 
@@ -1595,19 +1594,6 @@  void libxl__device_pci_add(libxl__egc *egc, uint32_t domid,
         goto out;
     }
 
-    rc = get_all_assigned_devices(gc, &assigned, &num_assigned);
-    if ( rc ) {
-        LOGD(ERROR, domid,
-             "cannot determine if device is assigned, refusing to continue");
-        goto out;
-    }
-    if ( is_pci_in_array(assigned, num_assigned, pci->domain,
-                         pci->bus, pci->dev, pci->func) ) {
-        LOGD(ERROR, domid, "PCI device already attached to a domain");
-        rc = ERROR_FAIL;
-        goto out;
-    }
-
     libxl__device_pci_reset(gc, pci->domain, pci->bus, pci->dev, pci->func);
 
     stubdomid = libxl_get_stubdom_id(ctx, domid);