linux-kernel - [PATCH] staging: pi433: goto abort when setting failed in tx

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Date:   Thu, 23 Sep 2021 08:31:15 +0100
From:   Sidong Yang <realwakka@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Cc:     Sidong Yang <realwakka@...il.com>
Subject: [PATCH] staging: pi433: goto abort when setting failed in tx_thread

tx_thread in pi433 works for transmitting. it reads tx_cfg and data
stored in kfifo put in pi433_write() and transmits. If it exits,
pi433_write() just store its data and no one transmits data. So,
tx_thread should not exit even when it failed for setting registers.
It seems that it's okay to go to abort and continue to loop and wait for
writing.

Signed-off-by: Sidong Yang <realwakka@...il.com>
---
 drivers/staging/pi433/pi433_if.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index c8d0c63fdd1d..29bd37669059 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -649,7 +649,7 @@ pi433_tx_thread(void *data)
 		/* clear fifo, set fifo threshold, set payload length */
 		retval = rf69_set_mode(spi, standby); /* this clears the fifo */
 		if (retval < 0)
-			return retval;
+			goto abort;
 
 		if (device->rx_active && !rx_interrupted) {
 			/*
@@ -661,33 +661,33 @@ pi433_tx_thread(void *data)
 
 		retval = rf69_set_fifo_threshold(spi, FIFO_THRESHOLD);
 		if (retval < 0)
-			return retval;
+			goto abort;
 		if (tx_cfg.enable_length_byte == OPTION_ON) {
 			retval = rf69_set_payload_length(spi, size * tx_cfg.repetitions);
 			if (retval < 0)
-				return retval;
+				goto abort;
 		} else {
 			retval = rf69_set_payload_length(spi, 0);
 			if (retval < 0)
-				return retval;
+				goto abort;
 		}
 
 		/* configure the rf chip */
 		retval = rf69_set_tx_cfg(device, &tx_cfg);
 		if (retval < 0)
-			return retval;
+			goto abort;
 
 		/* enable fifo level interrupt */
 		retval = rf69_set_dio_mapping(spi, DIO1, DIO_FIFO_LEVEL);
 		if (retval < 0)
-			return retval;
+			goto abort;
 		device->irq_state[DIO1] = DIO_FIFO_LEVEL;
 		irq_set_irq_type(device->irq_num[DIO1], IRQ_TYPE_EDGE_FALLING);
 
 		/* enable packet sent interrupt */
 		retval = rf69_set_dio_mapping(spi, DIO0, DIO_PACKET_SENT);
 		if (retval < 0)
-			return retval;
+			goto abort;
 		device->irq_state[DIO0] = DIO_PACKET_SENT;
 		irq_set_irq_type(device->irq_num[DIO0], IRQ_TYPE_EDGE_RISING);
 		enable_irq(device->irq_num[DIO0]); /* was disabled by rx active check */
@@ -695,7 +695,7 @@ pi433_tx_thread(void *data)
 		/* enable transmission */
 		retval = rf69_set_mode(spi, transmit);
 		if (retval < 0)
-			return retval;
+			goto abort;
 
 		/* transfer this msg (and repetitions) to chip fifo */
 		device->free_in_fifo = FIFO_SIZE;
@@ -742,7 +742,7 @@ pi433_tx_thread(void *data)
 		dev_dbg(device->dev, "thread: Packet sent. Set mode to stby.");
 		retval = rf69_set_mode(spi, standby);
 		if (retval < 0)
-			return retval;
+			goto abort;
 
 		/* everything sent? */
 		if (kfifo_is_empty(&device->tx_fifo)) {
-- 
2.20.1