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fel: Do a clean exit(0) after printing usage help

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Gracefully shut down the FEL utility, instead of continuing
execution. This avoids a possible "ERROR: Allwinner USB FEL
device not found!" when doing a plain `./sunxi-fel` without
any arguments (and no suitable USB device connected).

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
This commit is contained in:
Bernhard Nortmann 2016-04-13 08:39:27 +02:00
parent b7e092ec3f
commit 425278ac0d
1 changed files with 3 additions and 2 deletions
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5
fel.c
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@ -1369,8 +1369,6 @@ int main(int argc, char **argv)
libusb_device_handle *handle;
int busnum = -1, devnum = -1;
int iface_detached = -1;
int rc = libusb_init(NULL);
assert(rc == 0);
if (argc <= 1) {
printf("Usage: %s [options] command arguments... [command...]\n"
@ -1407,6 +1405,7 @@ int main(int argc, char **argv)
" fill address length value Fill memory\n"
, argv[0]
);
exit(0);
}
/* process all "prefix"-type arguments first */
@ -1434,6 +1433,8 @@ int main(int argc, char **argv)
argv += 1;
}
int rc = libusb_init(NULL);
assert(rc == 0);
handle = open_fel_device(busnum, devnum, AW_USB_VENDOR_ID, AW_USB_PRODUCT_ID);
assert(handle != NULL);
rc = libusb_claim_interface(handle, 0);