diff options
| author | Nirbhay Sharma <nirbhay.lkd@gmail.com> | 2025-11-15 11:46:47 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-11-24 17:53:49 +0100 |
| commit | 706cc5a93698195fea818ca056632a27a8e5515a (patch) | |
| tree | b8c45d0634edff02d405e5bf7b5016e30925801e /drivers | |
| parent | 47d3949a9b04cbcb0e10abae30c2b53e98706e11 (diff) | |
staging: greybus: uart: check return values during probe
Check the return values of send_control() and send_line_coding() during
device initialization in gb_uart_probe(). If these operations fail, the
device will be left in an inconsistent state, so propagate the error to
properly fail the probe.
Both functions call gb_operation_sync() which can fail with errors such
as -ENOMEM, -ENODEV, or -ETIMEDOUT. Ignoring these errors means the TTY
device would be registered despite incomplete initialization.
Signed-off-by: Nirbhay Sharma <nirbhay.lkd@gmail.com>
Link: https://patch.msgid.link/20251115061646.160847-2-nirbhay.lkd@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/greybus/uart.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c index 10df5c37c83e..5cece0a6606f 100644 --- a/drivers/staging/greybus/uart.c +++ b/drivers/staging/greybus/uart.c @@ -879,14 +879,18 @@ static int gb_uart_probe(struct gbphy_device *gbphy_dev, if (retval) goto exit_put_port; - send_control(gb_tty, gb_tty->ctrlout); + retval = send_control(gb_tty, gb_tty->ctrlout); + if (retval) + goto exit_connection_disable; /* initialize the uart to be 9600n81 */ gb_tty->line_coding.rate = cpu_to_le32(9600); gb_tty->line_coding.format = GB_SERIAL_1_STOP_BITS; gb_tty->line_coding.parity = GB_SERIAL_NO_PARITY; gb_tty->line_coding.data_bits = 8; - send_line_coding(gb_tty); + retval = send_line_coding(gb_tty); + if (retval) + goto exit_connection_disable; retval = gb_connection_enable(connection); if (retval) |