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xen: fix for 5.2-rc4 

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Merge tag 'for-linus-5.2b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "Just one fix for the Xen block frontend driver avoiding allocations
  with order > 0"

* tag 'for-linus-5.2b-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen-blkfront: switch kcalloc to kvcalloc for large array allocation
This commit is contained in:
Linus Torvalds 2019-06-08 13:16:05 -07:00
parent 3d4645bf7a 1d5c76e664
commit 8e61f6f7c3
1 changed files with 19 additions and 19 deletions
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38
drivers/block/xen-blkfront.c
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@ -1310,11 +1310,11 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo)
}
free_shadow:
kfree(rinfo->shadow[i].grants_used);
kvfree(rinfo->shadow[i].grants_used);
rinfo->shadow[i].grants_used = NULL;
kfree(rinfo->shadow[i].indirect_grants);
kvfree(rinfo->shadow[i].indirect_grants);
rinfo->shadow[i].indirect_grants = NULL;
kfree(rinfo->shadow[i].sg);
kvfree(rinfo->shadow[i].sg);
rinfo->shadow[i].sg = NULL;
}
@ -1353,7 +1353,7 @@ static void blkif_free(struct blkfront_info *info, int suspend)
for (i = 0; i < info->nr_rings; i++)
blkif_free_ring(&info->rinfo[i]);
kfree(info->rinfo);
kvfree(info->rinfo);
info->rinfo = NULL;
info->nr_rings = 0;
}
@ -1914,9 +1914,9 @@ static int negotiate_mq(struct blkfront_info *info)
if (!info->nr_rings)
info->nr_rings = 1;
info->rinfo = kcalloc(info->nr_rings,
sizeof(struct blkfront_ring_info),
GFP_KERNEL);
info->rinfo = kvcalloc(info->nr_rings,
sizeof(struct blkfront_ring_info),
GFP_KERNEL);
if (!info->rinfo) {
xenbus_dev_fatal(info->xbdev, -ENOMEM, "allocating ring_info structure");
info->nr_rings = 0;
@ -2232,17 +2232,17 @@ static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo)
for (i = 0; i < BLK_RING_SIZE(info); i++) {
rinfo->shadow[i].grants_used =
kcalloc(grants,
sizeof(rinfo->shadow[i].grants_used[0]),
GFP_NOIO);
rinfo->shadow[i].sg = kcalloc(psegs,
sizeof(rinfo->shadow[i].sg[0]),
GFP_NOIO);
kvcalloc(grants,
sizeof(rinfo->shadow[i].grants_used[0]),
GFP_NOIO);
rinfo->shadow[i].sg = kvcalloc(psegs,
sizeof(rinfo->shadow[i].sg[0]),
GFP_NOIO);
if (info->max_indirect_segments)
rinfo->shadow[i].indirect_grants =
kcalloc(INDIRECT_GREFS(grants),
sizeof(rinfo->shadow[i].indirect_grants[0]),
GFP_NOIO);
kvcalloc(INDIRECT_GREFS(grants),
sizeof(rinfo->shadow[i].indirect_grants[0]),
GFP_NOIO);
if ((rinfo->shadow[i].grants_used == NULL) ||
(rinfo->shadow[i].sg == NULL) ||
(info->max_indirect_segments &&
@ -2256,11 +2256,11 @@ static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo)
out_of_memory:
for (i = 0; i < BLK_RING_SIZE(info); i++) {
kfree(rinfo->shadow[i].grants_used);
kvfree(rinfo->shadow[i].grants_used);
rinfo->shadow[i].grants_used = NULL;
kfree(rinfo->shadow[i].sg);
kvfree(rinfo->shadow[i].sg);
rinfo->shadow[i].sg = NULL;
kfree(rinfo->shadow[i].indirect_grants);
kvfree(rinfo->shadow[i].indirect_grants);
rinfo->shadow[i].indirect_grants = NULL;
}
if (!list_empty(&rinfo->indirect_pages)) {