[PATCH 6/9] rcutorture/kvm-recheck-*: Improve result directory readability check

[SeongJae Park <sj38.park@gmail.com>]

kvm-recheck-(lock|rcu|rcuperf).sh is checking whether user specified
result directory exists or not.  If not, it prints out error message
that says the specified directory is not readable directory.  To make
the message more precise, this commit adds readability check of the
directory.

Fixes: 2193e1604eac ("rcutorture: Abstract kvm-recheck.sh")

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
---
 tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh    | 2 +-
 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh     | 2 +-
 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh
index 43f764098e50..2de92f43ee8c 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-lock.sh
@@ -23,7 +23,7 @@
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
 i="$1"
-if test -d $i
+if test -d "$i" -a -r "$i"
 then
 	:
 else
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh
index 559e01ac86be..9e34656bf659 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcu.sh
@@ -23,7 +23,7 @@
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
 i="$1"
-if test -d $i
+if test -d "$i" -a -r "$i"
 then
 	:
 else
diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
index 8f3121afc716..6138fd94abfe 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh
@@ -23,7 +23,7 @@
 # Authors: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
 
 i="$1"
-if test -d $i
+if test -d "$i" -a -r "$i"
 then
 	:
 else
-- 
2.13.0