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-rw-r--r--firmware/2lib/2api.c18
-rw-r--r--firmware/2lib/include/2api.h3
2 files changed, 21 insertions, 0 deletions
diff --git a/firmware/2lib/2api.c b/firmware/2lib/2api.c
index 7f12d22c..059cb6c2 100644
--- a/firmware/2lib/2api.c
+++ b/firmware/2lib/2api.c
@@ -111,6 +111,24 @@ int vb2api_fw_phase2(struct vb2_context *ctx)
{
int rv;
+ /*
+ * Use the slot from the last boot if this is a resume. Do not set
+ * VB2_SD_STATUS_CHOSE_SLOT so the try counter is not decremented on
+ * failure as we are explicitly not attempting to boot from a new slot.
+ */
+ if (ctx->flags & VB2_CONTEXT_S3_RESUME) {
+ struct vb2_shared_data *sd = vb2_get_sd(ctx);
+
+ /* Set the current slot to the last booted slot */
+ sd->fw_slot = vb2_nv_get(ctx, VB2_NV_FW_TRIED);
+
+ /* Set context flag if we're using slot B */
+ if (sd->fw_slot)
+ ctx->flags |= VB2_CONTEXT_FW_SLOT_B;
+
+ return VB2_SUCCESS;
+ }
+
/* Always clear RAM when entering developer mode */
if (ctx->flags & VB2_CONTEXT_DEVELOPER_MODE)
ctx->flags |= VB2_CONTEXT_CLEAR_RAM;
diff --git a/firmware/2lib/include/2api.h b/firmware/2lib/include/2api.h
index bf8f6393..709db48b 100644
--- a/firmware/2lib/include/2api.h
+++ b/firmware/2lib/include/2api.h
@@ -129,6 +129,9 @@ enum vb2_context_flags {
* unrecoverable crash loop.
*/
VB2_CONTEXT_SECDATA_WANTS_REBOOT = (1 << 13),
+
+ /* Boot is S3->S0 resume, not S5->S0 normal boot */
+ VB2_CONTEXT_S3_RESUME = (1 << 14),
};
/*