[MIPS] VPE loader: Check result of memory allocation.

And while at it, make it a little cleaner.  Issue originally reported by
Tiejun Chen (tiejun.chen@windriver.com).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index eed2dc4..39804c5 100644 (file)
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -262,13 +262,21 @@ void dump_mtregs(void)
 /* Find some VPE program space  */
 static void *alloc_progmem(unsigned long len)
 {
+       void *addr;
+
 #ifdef CONFIG_MIPS_VPE_LOADER_TOM
-       /* this means you must tell linux to use less memory than you physically have */
-       return pfn_to_kaddr(max_pfn);
+       /*
+        * This means you must tell Linux to use less memory than you
+        * physically have, for example by passing a mem= boot argument.
+        */
+       addr = pfn_to_kaddr(max_pfn);
+       memset(addr, 0, len);
 #else
-       // simple grab some mem for now
-       return kmalloc(len, GFP_KERNEL);
+       /* simple grab some mem for now */
+       addr = kzalloc(len, GFP_KERNEL);
 #endif
+
+       return addr;
 }
 
 static void release_progmem(void *ptr)
@@ -884,9 +892,10 @@ static int vpe_elfload(struct vpe * v)
        }
 
        v->load_addr = alloc_progmem(mod.core_size);
-       memset(v->load_addr, 0, mod.core_size);
+       if (!v->load_addr)
+               return -ENOMEM;
 
-       printk("VPE loader: loading to %p\n", v->load_addr);
+       pr_info("VPE loader: loading to %p\n", v->load_addr);
 
        if (relocate) {
                for (i = 0; i < hdr->e_shnum; i++) {