drm/xe/tests: remove unused leftover xe_call_for_each_device()

xe_call_for_each_device() has been unused since commit 57ecead3
("drm/xe/tests: Convert xe_mocs live tests"). Remove it and the related
dev_to_xe_device_fn() and struct kunit_test_data.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fa3bb23d005313c9797f557e1211fde09fcb59cc.1723458544.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/xe/tests/xe_pci.c

@@ -12,58 +12,6 @@
 #include <kunit/test-bug.h>
 #include <kunit/visibility.h>
 
-struct kunit_test_data {
-	int ndevs;
-	xe_device_fn xe_fn;
-};
-
-static int dev_to_xe_device_fn(struct device *dev, void *__data)
-
-{
-	struct drm_device *drm = dev_get_drvdata(dev);
-	struct kunit_test_data *data = __data;
-	int ret = 0;
-	int idx;
-
-	data->ndevs++;
-
-	if (drm_dev_enter(drm, &idx))
-		ret = data->xe_fn(to_xe_device(dev_get_drvdata(dev)));
-	drm_dev_exit(idx);
-
-	return ret;
-}
-
-/**
- * xe_call_for_each_device - Iterate over all devices this driver binds to
- * @xe_fn: Function to call for each device.
- *
- * This function iterated over all devices this driver binds to, and calls
- * @xe_fn: for each one of them. If the called function returns anything else
- * than 0, iteration is stopped and the return value is returned by this
- * function. Across each function call, drm_dev_enter() / drm_dev_exit() is
- * called for the corresponding drm device.
- *
- * Return: Number of devices iterated or
- *         the error code of a call to @xe_fn returning an error code.
- */
-int xe_call_for_each_device(xe_device_fn xe_fn)
-{
-	int ret;
-	struct kunit_test_data data = {
-	    .xe_fn = xe_fn,
-	    .ndevs = 0,
-	};
-
-	ret = driver_for_each_device(&xe_pci_driver.driver, NULL,
-				     &data, dev_to_xe_device_fn);
-
-	if (!data.ndevs)
-		kunit_skip(current->kunit_test, "test runs only on hardware\n");
-
-	return ret ?: data.ndevs;
-}
-
 /**
  * xe_call_for_each_graphics_ip - Iterate over all recognized graphics IPs
  * @xe_fn: Function to call for each device.

drivers/gpu/drm/xe/tests/xe_pci_test.h

@@ -19,7 +19,6 @@ typedef int (*xe_device_fn)(struct xe_device *);
 typedef void (*xe_graphics_fn)(const struct xe_graphics_desc *);
 typedef void (*xe_media_fn)(const struct xe_media_desc *);
 
-int xe_call_for_each_device(xe_device_fn xe_fn);
 void xe_call_for_each_graphics_ip(xe_graphics_fn xe_fn);
 void xe_call_for_each_media_ip(xe_media_fn xe_fn);