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xen/grant-table: Refactor gnttab_init

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We have this odd scenario of where for PV paths we take a shortcut
but for the HVM paths we first ioremap xen_hvm_resume_frames, then
assign it to gnttab_shared.addr. This is needed because gnttab_map
uses gnttab_shared.addr.

Instead of having:
	if (pv)
		return gnttab_map
	if (hvm)
		...

	gnttab_map

Lets move the HVM part before the gnttab_map and remove the
first call to gnttab_map.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2013-12-31 16:33:31 -05:00
parent 7f256020cc
commit 456847533b
1 changed files with 2 additions and 8 deletions
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10
drivers/xen/grant-table.c
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@ -1173,10 +1173,7 @@ static int gnttab_setup(void)
if (max_nr_gframes < nr_grant_frames)
return -ENOSYS;
if (xen_pv_domain())
return gnttab_map(0, nr_grant_frames - 1);
if (gnttab_shared.addr == NULL) {
if (xen_feature(XENFEAT_auto_translated_physmap) && gnttab_shared.addr == NULL) {
gnttab_shared.addr = xen_remap(xen_hvm_resume_frames,
PAGE_SIZE * max_nr_gframes);
if (gnttab_shared.addr == NULL) {
@ -1185,10 +1182,7 @@ static int gnttab_setup(void)
return -ENOMEM;
}
}
gnttab_map(0, nr_grant_frames - 1);
return 0;
return gnttab_map(0, nr_grant_frames - 1);
}
int gnttab_resume(void)