Check if this 3-step procedure exhibits any issues with device recover
after unplug. Such issues may indicate insufficient device hardware
re-initialization performed by the device driver, or other kernel bugs
outside the driver code.
v2: rebase on upstream
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@xxxxxxxxxxxxxxx>
---
tests/core_hotunplug.c | 40 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 38 insertions(+), 2 deletions(-)
diff --git a/tests/core_hotunplug.c b/tests/core_hotunplug.c
index 35eba9b8a..a4809720b 100644
--- a/tests/core_hotunplug.c
+++ b/tests/core_hotunplug.c
@@ -211,6 +211,35 @@ static void unbind_rebind(void)
healthcheck();
}
+static void unbind_unplug_rescan(void)
+{
+ struct hotunplug priv;
+ char buf[PATH_MAX];
+
+ /* prepare for unbind */
+ prepare_for_rebind(&priv, buf, sizeof(buf));
+
+ /* also prepare for unplug */
+ local_debug("closing the device");
+ close(priv.fd.drm);
+ prepare_for_rescan(&priv);
+
+ local_debug("closing the device");
+ close(priv.fd.drm);
+
+ local_debug("unbinding the driver from the device");
+ driver_unbind(priv.fd.sysfs_drv, priv.dev_bus_addr);
+ close(priv.fd.sysfs_drv);
+
+ local_debug("unplugging the device");
+ device_unplug(priv.fd.sysfs_dev);
+
+ local_debug("recovering the device");
+ bus_rescan(priv.fd.sysfs_bus);
+
+ healthcheck();
+}
+
static void unplug_rescan(void)
{
struct hotunplug priv;
@@ -290,14 +319,21 @@ igt_main
close(fd_drm);
}
- igt_describe("Check if the driver can be cleanly unbound from a device believed to be closed");
+ igt_describe("Check if the driver can be cleanly unbound from a device believed to be closed, then rebound");
igt_subtest("unbind-rebind")
unbind_rebind();
igt_fixture
igt_abort_on_f(failure, "%s\n", failure);
- igt_describe("Check if a device believed to be closed can be cleanly unplugged");
+ igt_describe("Check if a device with the driver unbound from it can be cleanly recovered after being unplugged\n");
+ igt_subtest("unbind-unplug-rescan")
+ unbind_unplug_rescan();
+
+ igt_fixture
+ igt_abort_on_f(failure, "%s\n", failure);
+
+ igt_describe("Check if a device believed to be closed can be cleanly unplugged and recovered");
igt_subtest("unplug-rescan")
unplug_rescan();
--
2.21.1
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