[v2,2/4] spi: imx: Fix failure path leak on GPIO request error

Commit Message

Trent Piepho Oct. 27, 2017, 1:08 a.m. UTC

If the code that requests any chip select GPIOs fails, the cleanup of
spi_bitbang_start() by calling spi_bitbang_stop() is not done.

Fix this by moving spi_bitbang_start() to after the code that requets
GPIOs.  The GPIOs are dev managed and don't need explicit cleanup.
Since spi_bitbang_start() is now the last operation, it doesn't need
to be cleaned up in the failure path.

CC: Shawn Guo <[e-mail]>
CC: Sascha Hauer <[e-mail]>
CC: Fabio Estevam <[e-mail]>
CC: Mark Brown <[e-mail]>
Reviewed-by: Oleksij Rempel <[e-mail]>
Signed-off-by: Trent Piepho <[e-mail]>
---
 drivers/spi/spi-imx.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 07e6250f2dad..fea46cbf458a 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -1451,11 +1451,6 @@  static int spi_imx_probe(struct platform_device *pdev)
 	spi_imx->devtype_data->intctrl(spi_imx, 0);
 
 	master->dev.of_node = pdev->dev.of_node;
-	ret = spi_bitbang_start(&spi_imx->bitbang);
-	if (ret) {
-		dev_err(&pdev->dev, "bitbang start failed with %d\n", ret);
-		goto out_clk_put;
-	}
 
 	/* Request GPIO CS lines, if any */
 	if (master->cs_gpios) {
@@ -1473,6 +1468,12 @@  static int spi_imx_probe(struct platform_device *pdev)
 		}
 	}
 
+	ret = spi_bitbang_start(&spi_imx->bitbang);
+	if (ret) {
+		dev_err(&pdev->dev, "bitbang start failed with %d\n", ret);
+		goto out_clk_put;
+	}
+
 	dev_info(&pdev->dev, "probed\n");
 
 	clk_disable(spi_imx->clk_ipg);