[PATCH v2 2/2] drm/xe: Allow to inject error in early probe

[Lucas De Marchi]

Allow to test if driver behaves correctly when xe_pcode_probe_early()
fails. Note that this is not sufficient for testing survivability mode
as it's still required to read the hw to check for errors, which doesn't
happen on an injected failure.

To complete the early probe coverage, allow injection in the other
functions as well: xe_mmio_probe_early() and xe_device_probe_early().

Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 1 +
 drivers/gpu/drm/xe/xe_mmio.c   | 1 +
 drivers/gpu/drm/xe/xe_pcode.c  | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 023290e5be392..1b443f54ee16a 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -728,6 +728,7 @@ int xe_device_probe_early(struct xe_device *xe)
 
 	return 0;
 }
+ALLOW_ERROR_INJECTION(xe_device_probe_early, ERRNO); /* See xe_pci_probe() */
 
 static int probe_has_flat_ccs(struct xe_device *xe)
 {
diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c
index 70a36e7775466..e1470fcf95d6d 100644
--- a/drivers/gpu/drm/xe/xe_mmio.c
+++ b/drivers/gpu/drm/xe/xe_mmio.c
@@ -138,6 +138,7 @@ int xe_mmio_probe_early(struct xe_device *xe)
 
 	return devm_add_action_or_reset(xe->drm.dev, mmio_fini, xe);
 }
+ALLOW_ERROR_INJECTION(xe_mmio_probe_early, ERRNO); /* See xe_pci_probe() */
 
 /**
  * xe_mmio_init() - Initialize an MMIO instance
diff --git a/drivers/gpu/drm/xe/xe_pcode.c b/drivers/gpu/drm/xe/xe_pcode.c
index 9333ce776a6e5..cf955b3ed52cd 100644
--- a/drivers/gpu/drm/xe/xe_pcode.c
+++ b/drivers/gpu/drm/xe/xe_pcode.c
@@ -7,6 +7,7 @@
 
 #include <linux/delay.h>
 #include <linux/errno.h>
+#include <linux/error-injection.h>
 
 #include <drm/drm_managed.h>
 
@@ -323,3 +324,4 @@ int xe_pcode_probe_early(struct xe_device *xe)
 {
 	return xe_pcode_ready(xe, false);
 }
+ALLOW_ERROR_INJECTION(xe_pcode_probe_early, ERRNO); /* See xe_pci_probe */

-- 
2.48.1