test/py: Update test_fs to decode check_output calls

The check_output function from the subprocess Python module by default
returns data as encoded bytes and leaves decoding to the application.
Given our uses of the call, it makes the most sense to immediately
decode the results.

Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Simon Glass <sjg@chromium.org> [on sandbox]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/test/py/tests/test_fs/conftest.py b/test/py/tests/test_fs/conftest.py
index 354d176..1949f91 100644
--- a/test/py/tests/test_fs/conftest.py
+++ b/test/py/tests/test_fs/conftest.py
@@ -300,38 +300,38 @@
         # Generate the md5sums of reads that we will test against small file
         out = check_output(
             'dd if=%s bs=1M skip=0 count=1 2> /dev/null | md5sum'
-	    % small_file, shell=True)
+	    % small_file, shell=True).decode()
         md5val = [ out.split()[0] ]
 
         # Generate the md5sums of reads that we will test against big file
         # One from beginning of file.
         out = check_output(
             'dd if=%s bs=1M skip=0 count=1 2> /dev/null | md5sum'
-	    % big_file, shell=True)
+	    % big_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # One from end of file.
         out = check_output(
             'dd if=%s bs=1M skip=2499 count=1 2> /dev/null | md5sum'
-	    % big_file, shell=True)
+	    % big_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # One from the last 1MB chunk of 2GB
         out = check_output(
             'dd if=%s bs=1M skip=2047 count=1 2> /dev/null | md5sum'
-	    % big_file, shell=True)
+	    % big_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # One from the start 1MB chunk from 2GB
         out = check_output(
             'dd if=%s bs=1M skip=2048 count=1 2> /dev/null | md5sum'
-	    % big_file, shell=True)
+	    % big_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # One 1MB chunk crossing the 2GB boundary
         out = check_output(
             'dd if=%s bs=512K skip=4095 count=2 2> /dev/null | md5sum'
-	    % big_file, shell=True)
+	    % big_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         umount_fs(mount_dir)
@@ -390,7 +390,7 @@
             % min_file, shell=True)
         out = check_output(
             'dd if=%s bs=1K 2> /dev/null | md5sum'
-            % min_file, shell=True)
+            % min_file, shell=True).decode()
         md5val = [ out.split()[0] ]
 
         # Calculate md5sum of Test Case 4
@@ -399,7 +399,7 @@
         check_call('dd if=%s of=%s bs=1K seek=5 count=20'
             % (min_file, tmp_file), shell=True)
         out = check_output('dd if=%s bs=1K 2> /dev/null | md5sum'
-            % tmp_file, shell=True)
+            % tmp_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # Calculate md5sum of Test Case 5
@@ -408,7 +408,7 @@
         check_call('dd if=%s of=%s bs=1K seek=5 count=5'
             % (min_file, tmp_file), shell=True)
         out = check_output('dd if=%s bs=1K 2> /dev/null | md5sum'
-            % tmp_file, shell=True)
+            % tmp_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         # Calculate md5sum of Test Case 7
@@ -417,7 +417,7 @@
         check_call('dd if=%s of=%s bs=1K seek=20 count=20'
             % (min_file, tmp_file), shell=True)
         out = check_output('dd if=%s bs=1K 2> /dev/null | md5sum'
-            % tmp_file, shell=True)
+            % tmp_file, shell=True).decode()
         md5val.append(out.split()[0])
 
         check_call('rm %s' % tmp_file, shell=True)
@@ -582,11 +582,11 @@
         # Generate the md5sums of reads that we will test against small file
         out = check_output(
             'dd if=%s bs=1M skip=0 count=1 2> /dev/null | md5sum'
-            % small_file, shell=True)
+            % small_file, shell=True).decode()
         md5val = [out.split()[0]]
         out = check_output(
             'dd if=%s bs=10M skip=0 count=1 2> /dev/null | md5sum'
-            % medium_file, shell=True)
+            % medium_file, shell=True).decode()
         md5val.extend([out.split()[0]])
 
         umount_fs(mount_dir)