[PATCH 07/25] libxl: stop using aodev->device_config in libxl__device_pci_add()...

From: Paul Durrant <paul@xen.org>
To: xen-devel@lists.xenproject.org
Cc: Paul Durrant <pdurrant@amazon.com>,
	Ian Jackson <iwj@xenproject.org>, Wei Liu <wl@xen.org>
Subject: [PATCH 07/25] libxl: stop using aodev->device_config in libxl__device_pci_add()...
Date: Fri, 23 Oct 2020 16:22:56 +0000	[thread overview]
Message-ID: <20201023162314.2235-8-paul@xen.org> (raw)
In-Reply-To: <20201023162314.2235-1-paul@xen.org>

From: Paul Durrant <pdurrant@amazon.com>

... to hold a pointer to the device.

There is already a 'pci' field in 'pci_add_state' so simply use that from
the start. This also allows the 'pci' (#3) argument to be dropped from
do_pci_add().

NOTE: This patch also changes the type of the 'pci_domid' field in
      'pci_add_state' from 'int' to 'libxl_domid' which is more appropriate
      given what the field is used for.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
---
Cc: Ian Jackson <iwj@xenproject.org>
Cc: Wei Liu <wl@xen.org>
---
 tools/libs/light/libxl_pci.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c
index 97889fda49..b8d8cc6a69 100644
--- a/tools/libs/light/libxl_pci.c
+++ b/tools/libs/light/libxl_pci.c
@@ -1055,7 +1055,7 @@ typedef struct pci_add_state {
     libxl__ev_qmp qmp;
     libxl__ev_time timeout;
     libxl_device_pci *pci;
-    int pci_domid;
+    libxl_domid pci_domid;
 } pci_add_state;
 
 static void pci_add_qemu_trad_watch_state_cb(libxl__egc *egc,
@@ -1072,7 +1072,6 @@ static void pci_add_dm_done(libxl__egc *,
 
 static void do_pci_add(libxl__egc *egc,
                        libxl_domid domid,
-                       libxl_device_pci *pci,
                        pci_add_state *pas)
 {
     STATE_AO_GC(pas->aodev->ao);
@@ -1082,7 +1081,6 @@ static void do_pci_add(libxl__egc *egc,
     /* init pci_add_state */
     libxl__xswait_init(&pas->xswait);
     libxl__ev_qmp_init(&pas->qmp);
-    pas->pci = pci;
     pas->pci_domid = domid;
     libxl__ev_time_init(&pas->timeout);
 
@@ -1544,13 +1542,10 @@ void libxl__device_pci_add(libxl__egc *egc, uint32_t domid,
     int stubdomid = 0;
     pci_add_state *pas;
 
-    /* Store *pci to be used by callbacks */
-    aodev->device_config = pci;
-    aodev->device_type = &libxl__pci_devtype;
-
     GCNEW(pas);
     pas->aodev = aodev;
     pas->domid = domid;
+    pas->pci = pci;
     pas->starting = starting;
     pas->callback = device_pci_add_stubdom_done;
 
@@ -1604,9 +1599,10 @@ void libxl__device_pci_add(libxl__egc *egc, uint32_t domid,
         GCNEW(pci_s);
         libxl_device_pci_init(pci_s);
         libxl_device_pci_copy(CTX, pci_s, pci);
+        pas->pci = pci_s;
         pas->callback = device_pci_add_stubdom_wait;
 
-        do_pci_add(egc, stubdomid, pci_s, pas); /* must be last */
+        do_pci_add(egc, stubdomid, pas); /* must be last */
         return;
     }
 
@@ -1661,9 +1657,8 @@ static void device_pci_add_stubdom_done(libxl__egc *egc,
     int i;
 
     /* Convenience aliases */
-    libxl__ao_device *aodev = pas->aodev;
     libxl_domid domid = pas->domid;
-    libxl_device_pci *pci = aodev->device_config;
+    libxl_device_pci *pci = pas->pci;
 
     if (rc) goto out;
 
@@ -1698,7 +1693,7 @@ static void device_pci_add_stubdom_done(libxl__egc *egc,
                 pci->vdevfn = orig_vdev;
             }
             pas->callback = device_pci_add_done;
-            do_pci_add(egc, domid, pci, pas); /* must be last */
+            do_pci_add(egc, domid, pas); /* must be last */
             return;
         }
     }
@@ -1714,7 +1709,7 @@ static void device_pci_add_done(libxl__egc *egc,
     EGC_GC;
     libxl__ao_device *aodev = pas->aodev;
     libxl_domid domid = pas->domid;
-    libxl_device_pci *pci = aodev->device_config;
+    libxl_device_pci *pci = pas->pci;
 
     if (rc) {
         LOGD(ERROR, domid,
-- 
2.11.0


