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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-09-23 08:31:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-09-23 08:31:24 -0700 |
| commit | 526e8262856027cea38c45a5ff45fbe4204aed04 (patch) | |
| tree | 8576000a7a43b266f3ebfab5822dbcad4288b6b5 | |
| parent | 22565ae784134282e03912023456151a61db479c (diff) | |
| parent | ce6b8ccdef959ba86b2711e090e84a987a000bf7 (diff) | |
| download | linux-trace-526e8262856027cea38c45a5ff45fbe4204aed04.tar.gz | |
Merge tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fix from Juergen Gross:
"A single fix for an issue in the xenbus driver (initialization of
multi-page rings for Xen PV devices)"
* tag 'for-linus-6.0-rc7-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/xenbus: fix xenbus_setup_ring()
| -rw-r--r-- | drivers/xen/xenbus/xenbus_client.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index d5f3f763717eae..d4b2519257962d 100644 --- a/drivers/xen/xenbus/xenbus_client.c +++ b/drivers/xen/xenbus/xenbus_client.c @@ -382,9 +382,10 @@ int xenbus_setup_ring(struct xenbus_device *dev, gfp_t gfp, void **vaddr, unsigned long ring_size = nr_pages * XEN_PAGE_SIZE; grant_ref_t gref_head; unsigned int i; + void *addr; int ret; - *vaddr = alloc_pages_exact(ring_size, gfp | __GFP_ZERO); + addr = *vaddr = alloc_pages_exact(ring_size, gfp | __GFP_ZERO); if (!*vaddr) { ret = -ENOMEM; goto err; @@ -401,13 +402,15 @@ int xenbus_setup_ring(struct xenbus_device *dev, gfp_t gfp, void **vaddr, unsigned long gfn; if (is_vmalloc_addr(*vaddr)) - gfn = pfn_to_gfn(vmalloc_to_pfn(vaddr[i])); + gfn = pfn_to_gfn(vmalloc_to_pfn(addr)); else - gfn = virt_to_gfn(vaddr[i]); + gfn = virt_to_gfn(addr); grefs[i] = gnttab_claim_grant_reference(&gref_head); gnttab_grant_foreign_access_ref(grefs[i], dev->otherend_id, gfn, 0); + + addr += XEN_PAGE_SIZE; } return 0; |