[U-Boot] [PATCH] fastboot: Fix slot names reported by getvar

Sam Protsenko semen.protsenko at linaro.org
Wed Jun 12 21:49:45 UTC 2019

In commit [1] fastboot tool was changed w.r.t. new A/B specification [2],
and now we should report slot names in "a" format instead of "_a".
Latter is now considered legacy and we shouldn't rely on that anymore.

Due to this one can observe next error with recent fastboot tool:

    $ fastboot flash boot boot.img
    Sending 'boot__a' (11301 KB)
        OKAY [  0.451s]
    Writing 'boot__a'
        FAILED (remote: 'cannot find partition')
    fastboot: error: Command failed

Let's use new slot format in order to fix double underscores "__" and to
be in sync with AOSP master.

[1] https://android.googlesource.com/platform/system/core/+/8091947847d5e5130b09d2ac0a4bdc900f3b77c5
[2] https://source.android.com/devices/tech/ota/ab/ab_implement#partitions

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
 drivers/fastboot/fb_getvar.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/fastboot/fb_getvar.c b/drivers/fastboot/fb_getvar.c
index 563bda0088..2f7fd23523 100644
--- a/drivers/fastboot/fb_getvar.c
+++ b/drivers/fastboot/fb_getvar.c
@@ -168,13 +168,13 @@ static void getvar_platform(char *var_parameter, char *response)
 static void getvar_current_slot(char *var_parameter, char *response)
-	/* A/B not implemented, for now always return _a */
-	fastboot_okay("_a", response);
+	/* A/B not implemented, for now always return "a" */
+	fastboot_okay("a", response);
 static void getvar_slot_suffixes(char *var_parameter, char *response)
-	fastboot_okay("_a,_b", response);
+	fastboot_okay("a,b", response);
 static void getvar_has_slot(char *part_name, char *response)

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