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authorLinus Torvalds <torvalds@linux-foundation.org>2014-07-30 20:00:20 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-07-30 20:00:20 +0400
commitacba648dca67c6a224991a9e9f935b2bdec8dc17 (patch)
tree2c9a08e4ae279850ac8e47010401be5095fdb957 /drivers
parentd8772157ef7b5f4fe208f3e8da7b9c6800495698 (diff)
parentb7dd0e350e0bd4c0fddcc9b8958342700b00b168 (diff)
downloadlinux-acba648dca67c6a224991a9e9f935b2bdec8dc17.tar.xz
Merge tag 'stable/for-linus-3.16-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull Xen fix from David Vrabel: "Fix BUG when trying to expand the grant table. This seems to occur often during boot with Ubuntu 14.04 PV guests" * tag 'stable/for-linus-3.16-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: x86/xen: safely map and unmap grant frames when in atomic context
Diffstat (limited to 'drivers')
-rw-r--r--drivers/xen/grant-table.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 5d4de88fe5b8..eeba7544f0cd 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -1195,18 +1195,20 @@ static int gnttab_expand(unsigned int req_entries)
int gnttab_init(void)
{
int i;
+ unsigned long max_nr_grant_frames;
unsigned int max_nr_glist_frames, nr_glist_frames;
unsigned int nr_init_grefs;
int ret;
gnttab_request_version();
+ max_nr_grant_frames = gnttab_max_grant_frames();
nr_grant_frames = 1;
/* Determine the maximum number of frames required for the
* grant reference free list on the current hypervisor.
*/
BUG_ON(grefs_per_grant_frame == 0);
- max_nr_glist_frames = (gnttab_max_grant_frames() *
+ max_nr_glist_frames = (max_nr_grant_frames *
grefs_per_grant_frame / RPP);
gnttab_list = kmalloc(max_nr_glist_frames * sizeof(grant_ref_t *),
@@ -1223,6 +1225,11 @@ int gnttab_init(void)
}
}
+ ret = arch_gnttab_init(max_nr_grant_frames,
+ nr_status_frames(max_nr_grant_frames));
+ if (ret < 0)
+ goto ini_nomem;
+
if (gnttab_setup() < 0) {
ret = -ENODEV;
goto ini_nomem;