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Index: sys/compat/x86bios/x86bios.c
===================================================================
--- sys/compat/x86bios/x86bios.c
+++ sys/compat/x86bios/x86bios.c
@@ -655,18 +655,24 @@
static __inline void
x86bios_unmap_mem(void)
{
-
- free(x86bios_map, M_DEVBUF);
- if (x86bios_ivt != NULL)
+ if (x86bios_map != NULL) {
+ free(x86bios_map, M_DEVBUF);
+ x86bios_map = NULL;
+ }
+ if (x86bios_ivt != NULL) {
#ifdef X86BIOS_NATIVE_ARCH
pmap_unmapbios((vm_offset_t)x86bios_ivt, X86BIOS_IVT_SIZE);
#else
free(x86bios_ivt, M_DEVBUF);
+ x86bios_ivt = NULL;
#endif
+ }
if (x86bios_rom != NULL)
pmap_unmapdev((vm_offset_t)x86bios_rom, X86BIOS_ROM_SIZE);
- if (x86bios_seg != NULL)
+ if (x86bios_seg != NULL) {
contigfree(x86bios_seg, X86BIOS_SEG_SIZE, M_DEVBUF);
+ x86bios_seg = NULL;
+ }
}
static __inline int
@@ -674,7 +680,9 @@
{
x86bios_map = malloc(sizeof(*x86bios_map) * X86BIOS_PAGES, M_DEVBUF,
- M_WAITOK | M_ZERO);
+ M_NOWAIT | M_ZERO);
+ if (x86bios_map == NULL)
+ goto fail;
#ifdef X86BIOS_NATIVE_ARCH
x86bios_ivt = pmap_mapbios(X86BIOS_IVT_BASE, X86BIOS_IVT_SIZE);
@@ -688,7 +696,9 @@
rounddown(x86bios_rom_phys, X86BIOS_PAGE_SIZE);
else
#else
- x86bios_ivt = malloc(X86BIOS_IVT_SIZE, M_DEVBUF, M_ZERO | M_WAITOK);
+ x86bios_ivt = malloc(X86BIOS_IVT_SIZE, M_DEVBUF, M_ZERO | M_NOWAIT);
+ if (x86bios_ivt == NULL)
+ goto fail;
#endif
x86bios_rom_phys = X86BIOS_ROM_BASE;
@@ -703,8 +713,10 @@
goto fail;
#endif
- x86bios_seg = contigmalloc(X86BIOS_SEG_SIZE, M_DEVBUF, M_WAITOK,
+ x86bios_seg = contigmalloc(X86BIOS_SEG_SIZE, M_DEVBUF, M_NOWAIT,
X86BIOS_RAM_BASE, x86bios_rom_phys, X86BIOS_PAGE_SIZE, 0);
+ if (x86bios_seg == NULL)
+ goto fail;
x86bios_seg_phys = vtophys(x86bios_seg);
x86bios_set_pages((vm_offset_t)x86bios_ivt, X86BIOS_IVT_BASE,

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