[PATCH] usb: gadget: fastboot: fix barebox update without using buffer

[Michael Grzeschik]

Commit e5098495 "usb: gadget: fastboot: Add option to download to a buffer"
breaks the use of temporary files for fastboot barebox_update.

In the patch the ".imagefile = FASTBOOT_TMPFILE" allocation gets
removed, but data.imagefile is still used. This leads to an NULL
pointer dereference. We fix it by using sourcefile instead.

Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
---
 drivers/usb/gadget/f_fastboot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 787b1205ec..7ccf227714 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -999,7 +999,7 @@ static void cb_flash(struct f_fastboot *f_fb, const char *cmd)
 		if (fastboot_download_to_buf(f_fb)) {
 			data.len = f_fb->download_size;
 		} else {
-			ret = read_file_2(data.imagefile, &data.len, &f_fb->buf,
+			ret = read_file_2(sourcefile, &data.len, &f_fb->buf,
 					f_fb->download_size);
 			if (ret) {
 				fastboot_tx_print(f_fb, "FAILreading barebox");
-- 
2.17.0