[PATCH] ehca: fix do_mmap() error check

[Akinobu Mita]

The return value of do_mmap() should be checked by IS_ERR().

Cc: Hoang-Nam Nguyen <[EMAIL PROTECTED]>
Cc: Christoph Raisch <[EMAIL PROTECTED]>
Signed-off-by: Akinobu Mita <[EMAIL PROTECTED]>

---
 drivers/infiniband/hw/ehca/ehca_uverbs.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: 2.6-mm/drivers/infiniband/hw/ehca/ehca_uverbs.c
===================================================================
--- 2.6-mm.orig/drivers/infiniband/hw/ehca/ehca_uverbs.c
+++ 2.6-mm/drivers/infiniband/hw/ehca/ehca_uverbs.c
@@ -321,14 +321,14 @@ int ehca_mmap_nopage(u64 foffset, u64 le
                     struct vm_area_struct **vma)
 {
        down_write(&current->mm->mmap_sem);
-       *mapped = (void*)do_mmap(NULL,0, length, PROT_WRITE,
+       *mapped = (void*)do_mmap(NULL, 0, length, PROT_WRITE,
                                 MAP_SHARED | MAP_ANONYMOUS,
                                 foffset);
        up_write(&current->mm->mmap_sem);
-       if (!(*mapped)) {
+       if (IS_ERR(*mapped)) {
                ehca_gen_err("couldn't mmap foffset=%lx length=%lx",
                             foffset, length);
-               return -EINVAL;
+               return PTR_ERR(*mmaped);
        }
 
        *vma = find_vma(current->mm, (u64)*mapped);
-
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