diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2016-01-21 17:21:08 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-01-21 17:21:08 +0000 |
| commit | 0b0571dd246871f18b7d64b5279511e91e2a7bf6 (patch) | |
| tree | 5fe918d7f97873791ac23f8e3bae64483b3f0ec2 /hw/display | |
| parent | 83446463dd7b7e3d7e69bcaa079d6a5d8cd3cd76 (diff) | |
| parent | 5a11d0f7549e24a10e178a9dc8ff5e698031d9a6 (diff) | |
Merge remote-tracking branch 'remotes/sstabellini/tags/xen-20160121' into staging
Xen 2016/01/21
# gpg: Signature made Thu 21 Jan 2016 16:58:50 GMT using RSA key ID 70E1AE90
# gpg: Good signature from "Stefano Stabellini <stefano.stabellini@eu.citrix.com>"
* remotes/sstabellini/tags/xen-20160121:
Xen PCI passthru: convert to realize()
Add Error **errp for xen_pt_config_init()
Add Error **errp for xen_pt_setup_vga()
Add Error **errp for xen_host_pci_device_get()
Xen: use qemu_strtoul instead of strtol
Change xen_host_pci_sysfs_path() to return void
xen-pvdevice: convert to realize()
xen-hvm: Clean up xen_ram_alloc() error handling
xen-hvm: Clean up xen_hvm_init() error handling
xenfb.c: avoid expensive loops when prod <= out_cons
MAINTAINERS: update Xen files
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/display')
| -rw-r--r-- | hw/display/xenfb.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c index 4e2a27a3d6..8eb3046244 100644 --- a/hw/display/xenfb.c +++ b/hw/display/xenfb.c @@ -789,8 +789,9 @@ static void xenfb_handle_events(struct XenFB *xenfb) prod = page->out_prod; out_cons = page->out_cons; - if (prod == out_cons) - return; + if (prod - out_cons >= XENFB_OUT_RING_LEN) { + return; + } xen_rmb(); /* ensure we see ring contents up to prod */ for (cons = out_cons; cons != prod; cons++) { union xenfb_out_event *event = &XENFB_OUT_RING_REF(page, cons); |