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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-23 14:32:19 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-09-23 14:32:19 +0300
commit18d49ec3c62f46d7225f822e112742fbe0daf94b (patch)
treef2f55388d9300d8510d8fafb7a75b9d68a92b53c /drivers
parenta83f87c1d2a93a8fd2413ce8f410b69848db0fd5 (diff)
parentd59f532480f5231bf62615a9287e05b78225fb05 (diff)
downloadlinux-18d49ec3c62f46d7225f822e112742fbe0daf94b.tar.xz
Merge tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Juergen writes: "xen: Two small fixes for xen drivers." * tag 'for-linus-4.19d-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: issue warning message when out of grant maptrack entries xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code
Diffstat (limited to 'drivers')
-rw-r--r--drivers/xen/grant-table.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 7bafa703a992..84575baceebc 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -1040,18 +1040,33 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
return ret;
for (i = 0; i < count; i++) {
- /* Retry eagain maps */
- if (map_ops[i].status == GNTST_eagain)
- gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, map_ops + i,
- &map_ops[i].status, __func__);
-
- if (map_ops[i].status == GNTST_okay) {
+ switch (map_ops[i].status) {
+ case GNTST_okay:
+ {
struct xen_page_foreign *foreign;
SetPageForeign(pages[i]);
foreign = xen_page_foreign(pages[i]);
foreign->domid = map_ops[i].dom;
foreign->gref = map_ops[i].ref;
+ break;
+ }
+
+ case GNTST_no_device_space:
+ pr_warn_ratelimited("maptrack limit reached, can't map all guest pages\n");
+ break;
+
+ case GNTST_eagain:
+ /* Retry eagain maps */
+ gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref,
+ map_ops + i,
+ &map_ops[i].status, __func__);
+ /* Test status in next loop iteration. */
+ i--;
+ break;
+
+ default:
+ break;
}
}