[flashrom] [PATCH] DJGPP: Avoid leak on lowmem mapping error

[Carl-Daniel Hailfinger]

DJGPP: Avoid leaking memory on lowmem mapping error.
Add a clarifying comment about why low memory is never unmapped.

Signed-off-by: Carl-Daniel Hailfinger

Index: flashrom-djgpp_physmap_noleaks/physmap.c
===================================================================
--- flashrom-djgpp_physmap_noleaks/physmap.c	(Revision 1194)
+++ flashrom-djgpp_physmap_noleaks/physmap.c	(Arbeitskopie)
@@ -56,6 +56,8 @@
    }

if (__djgpp_map_physical_memory(realmem_map, (1024 * 1024), 0)) {
+		free(realmem_map);
+		realmem_map = NULL;
    	return ERROR_PTR;
    }

@@ -95,7 +97,9 @@
 {
    __dpmi_meminfo mi;

-	/* we ignore unmaps for our first 1MB */
+	/* There is no known way to unmap the first 1 MB. The DPMI server will
+	 * do this for us on exit.
+	 */
    if ((virt_addr >= realmem_map) && ((virt_addr + len) <= (realmem_map + (1024 * 1024)))) {
    	return;
    }