Add a test for the dm drivers command. Also fix a null pointer dereference revealed by said test.
Signed-off-by: Sean Anderson <sean...@gmail.com> Reviewed-by: Bin Meng <bmeng...@gmail.com> Tested-by: Bin Meng <bmeng...@gmail.com> Reviewed-by: Simon Glass <s...@chromium.org> --- The changes in this patch were originally submitted as v3 of 7b9d60fc1ff "cmd: Add command to dump drivers and compatible strings" [1]. I have retained the Reviewed-by and Tested-by tags since no other changes besides rebasing on v1 have been made. [1] https://patchwork.ozlabs.org/patch/1234460/ cmd/dm.c | 4 ++-- drivers/core/dump.c | 3 ++- test/py/tests/test_dm.py | 17 +++++++++++++++++ 3 files changed, 21 insertions(+), 3 deletions(-) create mode 100644 test/py/tests/test_dm.py diff --git a/cmd/dm.c b/cmd/dm.c index 108707c298..7a90685f8b 100644 --- a/cmd/dm.c +++ b/cmd/dm.c @@ -41,7 +41,7 @@ static int do_dm_dump_devres(cmd_tbl_t *cmdtp, int flag, int argc, } static int do_dm_dump_drivers(cmd_tbl_t *cmdtp, int flag, int argc, - char * const argv[]) + char * const argv[]) { dm_dump_drivers(); @@ -94,5 +94,5 @@ U_BOOT_CMD( "tree Dump driver model tree ('*' = activated)\n" "dm uclass Dump list of instances for each uclass\n" "dm devres Dump list of device resources for each device\n" - "dm drivers Dump list of drivers and their compatible strings\n" + "dm drivers Dump list of drivers and their compatible strings" ); diff --git a/drivers/core/dump.c b/drivers/core/dump.c index e73ebeabcc..b5046398d4 100644 --- a/drivers/core/dump.c +++ b/drivers/core/dump.c @@ -107,7 +107,8 @@ void dm_dump_drivers(void) puts("Driver Compatible\n"); puts("--------------------------------\n"); for (entry = d; entry < d + n_ents; entry++) { - for (match = entry->of_match; match->compatible; match++) + for (match = entry->of_match; + match && match->compatible; match++) printf("%-20.20s %s\n", match == entry->of_match ? entry->name : "", match->compatible); diff --git a/test/py/tests/test_dm.py b/test/py/tests/test_dm.py new file mode 100644 index 0000000000..f6fbf8ba4c --- /dev/null +++ b/test/py/tests/test_dm.py @@ -0,0 +1,17 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2020 Sean Anderson + +import pytest + +@pytest.mark.buildconfigspec('cmd_dm') +def test_dm_drivers(u_boot_console): + """Test that each driver in `dm tree` is also listed in `dm drivers`.""" + response = u_boot_console.run_command('dm tree') + driver_index = response.find('Driver') + assert driver_index != -1 + drivers = (line[driver_index:].split()[0] + for line in response[:-1].split('\n')[2:]) + + response = u_boot_console.run_command('dm drivers') + for driver in drivers: + assert driver in response -- 2.25.1
