Sometimes it's useful to only run tests which exercise a device
special driver to verify a patch for the driver doesn't introduce a
regression.

Running the whole test-suite is just a waste of time in this case, so
provide a way to only run tests which have a test_device() function
set and not a test() function.

Signed-off-by: Johannes Thumshirn <jthumsh...@suse.de>
---
 check | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/check b/check
index 4baa8dde2436..639fcc43f09d 100755
--- a/check
+++ b/check
@@ -395,6 +395,12 @@ _run_test() {
        . "tests/${TEST_NAME}"
 
        if declare -fF test >/dev/null; then
+               if [[ -v DEVICE_ONLY ]]; then
+                       SKIP_REASON="test excluded by user"
+                       _output_notrun "$TEST_NAME"
+                       return 0
+               fi
+
                if declare -fF requires >/dev/null && ! requires; then
                        _output_notrun "$TEST_NAME"
                        return 0
@@ -546,6 +552,9 @@ Test runs:
   -x, --exclude=TEST     exclude a test (or test group) from the list of
                         tests to run
 
+  -d --device-only       only run test which use a test device from the
+                         TEST_DEV config setting
+
 Miscellaneous:
   -h, --help             display this help message and exit"
 
@@ -570,6 +579,7 @@ unset TEMP
 
 # Default configuration.
 QUICK_RUN=0
+DEVICE_ONLY=0
 EXCLUDE=()
 TEST_DEVS=()
 
@@ -592,6 +602,10 @@ while true; do
                        EXCLUDE+=("$2")
                        shift 2
                        ;;
+               '-d'|'--device-only')
+                       DEVICE_ONLY=1
+                       shift 2
+                       ;;
                '-h'|'--help')
                        usage out
                        ;;
@@ -609,6 +623,10 @@ if [[ QUICK_RUN -ne 0 && ! -v TIMEOUT ]]; then
        _error "QUICK_RUN specified without TIMEOUT"
 fi
 
+if [[ DEVICE_ONLY -ne 0 && ${#TEST_DEVS[@]} -eq 0 ]]; then
+       _error "DEVICE_ONLY specified without TEST_DEVS"
+fi
+
 # Convert the exclude list to an associative array.
 TEMP_EXCLUDE=("${EXCLUDE[@]}")
 unset EXCLUDE
-- 
2.16.4

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