bootstd: Report missing labels only when asked

Use the -l flag to indicate whether to report missing uclasses.

Also try to be more helpful when no devices are found. For example, when
we see something 'scsi0' requested and nothing was found, this indicates
that there are no SCSI devices, so show a suitable message.

Move messages out of the low-level functions so that silent operation
is possible.

This means they are never reported unless BOOTSTD_FULL is enabled, since
the -l flag cannot otherwise be set.

Suggested-by: Tom Rini <trini@konsulko.com>

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 31 insertions, 15 deletions

diff --git a/boot/bootdev-uclass.c b/boot/bootdev-uclass.c
index d34b7e37cf..91087981d2 100644
--- a/boot/bootdev-uclass.c
+++ b/boot/bootdev-uclass.c
@@ -364,7 +364,8 @@ int bootdev_unbind_dev(struct udevice *parent)
  * @seqp: Returns the sequence number, or -1 if none
  * @method_flagsp: If non-NULL, returns any flags implied by the label
  * (enum bootflow_meth_flags_t), 0 if none
- * Returns: sequence number on success, else -ve error code
+ * Returns: sequence number on success, -EPFNOSUPPORT is the uclass is not
+ * known, other -ve error code on other error
  */
 static int label_to_uclass(const char *label, int *seqp, int *method_flagsp)
 {
@@ -394,8 +395,7 @@ static int label_to_uclass(const char *label, int *seqp, int *method_flagsp)
 			id = UCLASS_ETH;
 			method_flags |= BOOTFLOW_METHF_DHCP_ONLY;
 		} else {
-			log_warning("Unknown uclass '%s' in label\n", label);
-			return -EINVAL;
+			return -EPFNOSUPPORT;
 		}
 	}
 	if (id == UCLASS_USB)
@@ -458,7 +458,6 @@ int bootdev_find_by_label(const char *label, struct udevice **devp,
 		}
 		log_debug("- no device in %s\n", media->name);
 	}
-	log_warning("Unknown seq %d for label '%s'\n", seq, label);
 
 	return -ENOENT;
 }
@@ -577,9 +576,28 @@ int bootdev_next_label(struct bootflow_iter *iter, struct udevice **devp,
 
 	log_debug("next\n");
 	for (dev = NULL; !dev && iter->labels[++iter->cur_label];) {
-		log_debug("Scanning: %s\n", iter->labels[iter->cur_label]);
-		bootdev_hunt_and_find_by_label(iter->labels[iter->cur_label],
-					       &dev, method_flagsp);
+		const char *label = iter->labels[iter->cur_label];
+		int ret;
+
+		log_debug("Scanning: %s\n", label);
+		ret = bootdev_hunt_and_find_by_label(label, &dev,
+						     method_flagsp);
+		if (iter->flags & BOOTFLOWIF_SHOW) {
+			if (ret == -EPFNOSUPPORT) {
+				log_warning("Unknown uclass '%s' in label\n",
+					    label);
+			} else if (ret == -ENOENT) {
+				/*
+				 * looking for, e.g. 'scsi0' should find
+				 * something if SCSI is present
+				 */
+				if (!trailing_strtol(label)) {
+					log_warning("No bootdevs for '%s'\n",
+						    label);
+				}
+			}
+		}
+
 	}
 
 	if (!dev)
diff --git a/include/bootdev.h b/include/bootdev.h
index b92ff4d4f1..e72ef3650f 100644
--- a/include/bootdev.h
+++ b/include/bootdev.h
@@ -258,7 +258,7 @@ int bootdev_find_by_label(const char *label, struct udevice **devp,
  * @devp: returns the device found, on success
  * @method_flagsp: If non-NULL, returns any flags implied by the label
  * (enum bootflow_meth_flags_t), 0 if none. Unset if function fails
- * Return: 0 if OK, -EINVAL if the uclass is not supported by this board,
+ * Return: 0 if OK, -EPFNOSUPPORT if the uclass is not supported by this board,
  * -ENOENT if there is no device with that number
  */
 int bootdev_find_by_any(const char *name, struct udevice **devp,
diff --git a/test/boot/bootdev.c b/test/boot/bootdev.c
index 4fe9fd7220..0899c78c2c 100644
--- a/test/boot/bootdev.c
+++ b/test/boot/bootdev.c
@@ -124,7 +124,8 @@ static int bootdev_test_labels(struct unit_test_state *uts)
 		    mflags);
 
 	/* Check invalid uclass */
-	ut_asserteq(-EINVAL, bootdev_find_by_label("fred0", &dev, &mflags));
+	ut_asserteq(-EPFNOSUPPORT,
+		    bootdev_find_by_label("fred0", &dev, &mflags));
 
 	/* Check unknown sequence number */
 	ut_asserteq(-ENOENT, bootdev_find_by_label("mmc6", &dev, &mflags));
@@ -179,9 +180,8 @@ static int bootdev_test_any(struct unit_test_state *uts)
 
 	/* Check invalid uclass */
 	mflags = 123;
-	ut_asserteq(-EINVAL, bootdev_find_by_any("fred0", &dev, &mflags));
-	ut_assert_nextline("Unknown uclass 'fred0' in label");
-	ut_assert_nextline("Cannot find bootdev 'fred0' (err=-22)");
+	ut_asserteq(-EPFNOSUPPORT, bootdev_find_by_any("fred0", &dev, &mflags));
+	ut_assert_nextline("Cannot find bootdev 'fred0' (err=-96)");
 	ut_asserteq(123, mflags);
 	ut_assert_console_end();
 
@@ -512,9 +512,8 @@ static int bootdev_test_hunt_label(struct unit_test_state *uts)
 	old = (void *)&mflags;   /* arbitrary pointer to check against dev */
 	dev = old;
 	mflags = 123;
-	ut_asserteq(-EINVAL,
+	ut_asserteq(-EPFNOSUPPORT,
 		    bootdev_hunt_and_find_by_label("fred", &dev, &mflags));
-	ut_assert_nextline("Unknown uclass 'fred' in label");
 	ut_asserteq_ptr(old, dev);
 	ut_asserteq(123, mflags);
 	ut_assert_console_end();
@@ -525,7 +524,6 @@ static int bootdev_test_hunt_label(struct unit_test_state *uts)
 		    bootdev_hunt_and_find_by_label("mmc4", &dev, &mflags));
 	ut_asserteq_ptr(old, dev);
 	ut_asserteq(123, mflags);
-	ut_assert_nextline("Unknown seq 4 for label 'mmc4'");
 	ut_assert_console_end();
 
 	ut_assertok(bootstd_test_check_mmc_hunter(uts));