Exporting only the bbu handler and nothing else over fastboot
via usbgadget -A '' -b used to work. Restore this.

Signed-off-by: Ahmad Fatoum <[email protected]>
---
 common/fastboot.c          |  2 ++
 drivers/usb/gadget/multi.c | 15 ++++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/common/fastboot.c b/common/fastboot.c
index 330a06f5a32f..72e6ba3c402a 100644
--- a/common/fastboot.c
+++ b/common/fastboot.c
@@ -171,6 +171,8 @@ int fastboot_generic_init(struct fastboot *fb, bool 
export_bbu)
        if (!fb->tempname)
                return -ENOMEM;
 
+       if (!fb->files)
+               fb->files = file_list_new();
        if (export_bbu)
                bbu_append_handlers_to_file_list(fb->files);
 
diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 102d8714f86d..6225e9a313a1 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -137,6 +137,12 @@ static int multi_bind_fastboot(struct usb_composite_dev 
*cdev)
        return usb_add_function(&config, f_fastboot);
 }
 
+static bool fastboot_has_exports(struct f_multi_opts *opts)
+{
+       return !file_list_empty(opts->fastboot_opts.files) ||
+               opts->fastboot_opts.export_bbu;
+}
+
 static int multi_bind_ums(struct usb_composite_dev *cdev)
 {
        int ret;
@@ -179,7 +185,7 @@ static int multi_unbind(struct usb_composite_dev *cdev)
                usb_put_function_instance(fi_dfu);
        }
 
-       if (gadget_multi_opts->fastboot_opts.files) {
+       if (fastboot_has_exports(gadget_multi_opts)) {
                usb_put_function(f_fastboot);
                usb_put_function_instance(fi_fastboot);
        }
@@ -219,7 +225,7 @@ static int multi_bind(struct usb_composite_dev *cdev)
        if (ret)
                return ret;
 
-       if (gadget_multi_opts->fastboot_opts.files) {
+       if (fastboot_has_exports(gadget_multi_opts)) {
                printf("%s: creating Fastboot function\n", __func__);
                ret = multi_bind_fastboot(cdev);
                if (ret)
@@ -259,7 +265,7 @@ unbind_dfu:
        if (gadget_multi_opts->dfu_opts.files)
                usb_put_function_instance(fi_dfu);
 unbind_fastboot:
-       if (gadget_multi_opts->fastboot_opts.files)
+       if (fastboot_has_exports(gadget_multi_opts))
                usb_put_function_instance(fi_fastboot);
 
        return ret;
@@ -312,8 +318,7 @@ unsigned usb_multi_count_functions(struct f_multi_opts 
*opts)
 {
        unsigned count = 0;
 
-       count += !file_list_empty(opts->fastboot_opts.files) ||
-               opts->fastboot_opts.export_bbu;
+       count += fastboot_has_exports(opts);
        count += !file_list_empty(opts->dfu_opts.files);
        count += !file_list_empty(opts->ums_opts.files);
        count += opts->create_acm;
-- 
2.30.2


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