Re: [PATCH v3] eal/linuxapp: check mmap return value MAP_FAILED

If mmap fails, it will return the value MAP_FAILED. Checking for this
return code allows us to properly identify mmap failures and report
them as such to the calling function.

Signed-off-by: Seth Howell <redacted>
---
  lib/librte_eal/linuxapp/eal/eal_memory.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5279128..63fec29 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c

@@ -716,6 +716,8 @@ create_shared_memory(const char *filename, const size_t mem_size)
  	}
  	retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  	close(fd);
+	if (retval == MAP_FAILED)
+		return NULL;
  	return retval;
  }