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xen: fixes for 4.19-rc5

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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
This commit is contained in:
Greg Kroah-Hartman 2018-09-23 13:32:19 +02:00
commit 18d49ec3c6
2 changed files with 22 additions and 7 deletions
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2
arch/x86/xen/pmu.c
View File

@ -478,7 +478,7 @@ static void xen_convert_regs(const struct xen_pmu_regs *xen_regs,
irqreturn_t xen_pmu_irq_handler(int irq, void *dev_id)
{
int err, ret = IRQ_NONE;
struct pt_regs regs;
struct pt_regs regs = {0};
const struct xen_pmu_data *xenpmu_data = get_xenpmu_data();
uint8_t xenpmu_flags = get_xenpmu_flags();

27
drivers/xen/grant-table.c
View File

@ -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;
}
}