net_loop() returns signed int type and negative value represents error.
tftp_read_file() returns unsigned size_t type and zero value represents
error. Casting signed negative value to unsigned size_t type cause losing
information about error and bubt thinks that no error happened, and
continue erasing SPI-NOR which cause malfunction device.
Fix this issue by correctly propagating failure during tftp transport.
With this change when there is no eth link, bubt does not erase SPI-NOR
anymore.
=> bubt
Burning U-Boot image "flash-image.bin" from "tftp" to "spi"
ethernet@30000 Waiting for PHY auto negotiation to complete......... TIMEOUT !
ethernet@30000: No link.
Error: Failed to read file flash-image.bin from tftp
Signed-off-by: Pali Rohár <p...@kernel.org>
---
cmd/mvebu/bubt.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/cmd/mvebu/bubt.c b/cmd/mvebu/bubt.c
index a05e22a5479c..2924b1539f32 100644
--- a/cmd/mvebu/bubt.c
+++ b/cmd/mvebu/bubt.c
@@ -455,11 +455,14 @@ static int is_usb_active(void)
#ifdef CONFIG_CMD_NET
static size_t tftp_read_file(const char *file_name)
{
+ int ret;
+
/*
* update global variable image_load_addr before tftp file from network
*/
image_load_addr = get_load_addr();
- return net_loop(TFTPGET);
+ ret = net_loop(TFTPGET);
+ return ret > 0 ? ret : 0;
}
static int is_tftp_active(void)
--
2.20.1
