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pvusb: set max grants only in initialise 

Don't call xen_be_set_max_grant_refs() in usbback_alloc(), as the
gnttabdev pointer won't be initialised yet. The call can easily be
moved to usbback_connect().

Signed-off-by: Juergen Gross <jgross@suse.com>
Message-id: 20181206133923.30105-1-jgross@suse.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Juergen Gross 2018-12-06 14:39:23 +01:00 committed by Gerd Hoffmann
parent 4f818e7b7f
commit f8224fb0fa
1 changed files with 6 additions and 6 deletions
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12
hw/usb/xen-usb.c
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@ -860,10 +860,14 @@ static int usbback_connect(struct XenDevice *xendev)
struct usbif_conn_sring *conn_sring;
int urb_ring_ref;
int conn_ring_ref;
unsigned int i;
unsigned int i, max_grants;
TR_BUS(xendev, "start\n");
/* max_grants: for each request and for the rings (request and connect). */
max_grants = USBIF_MAX_SEGMENTS_PER_REQUEST * USB_URB_RING_SIZE + 2;
xen_be_set_max_grant_refs(xendev, max_grants);
usbif = container_of(xendev, struct usbback_info, xendev);
if (xenstore_read_fe_int(xendev, "urb-ring-ref", &urb_ring_ref)) {
@ -1005,7 +1009,7 @@ static void usbback_alloc(struct XenDevice *xendev)
{
struct usbback_info *usbif;
USBPort *p;
unsigned int i, max_grants;
unsigned int i;
usbif = container_of(xendev, struct usbback_info, xendev);
@ -1021,10 +1025,6 @@ static void usbback_alloc(struct XenDevice *xendev)
QTAILQ_INIT(&usbif->req_free_q);
QSIMPLEQ_INIT(&usbif->hotplug_q);
usbif->bh = qemu_bh_new(usbback_bh, usbif);
/* max_grants: for each request and for the rings (request and connect). */
max_grants = USBIF_MAX_SEGMENTS_PER_REQUEST * USB_URB_RING_SIZE + 2;
xen_be_set_max_grant_refs(xendev, max_grants);
}
static int usbback_free(struct XenDevice *xendev)