[PATCH 4.4 076/114] spi: xlp: fix error return code in xlp_spi_probe()

Greg Kroah-Hartman
2018-11-08T21:51:31Z

[ Upstream commit 9a6b94796ae6feaf275ec6200e9b2964db208182 ]

platform_get_irq() returns an error code, but the spi-xlp driver ignores
it and always returns -EINVAL. This is not correct and, prevents
-EPROBE_DEFER from being propagated properly.

Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af

Print and propagate the return value of platform_get_irq on failure.

This issue was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-xlp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-xlp.c b/drivers/spi/spi-xlp.c
index 8f04feca6ee3..0ddb0adaa8aa 100644
--- a/drivers/spi/spi-xlp.c
+++ b/drivers/spi/spi-xlp.c
@@ -392,8 +392,8 @@ static int xlp_spi_probe(struct platform_device *pdev)

irq = platform_get_irq(pdev, 0);
if (irq < 0) {
- dev_err(&pdev->dev, "no IRQ resource found\n");
- return -EINVAL;
+ dev_err(&pdev->dev, "no IRQ resource found: %d\n", irq);
+ return irq;
}
err = devm_request_irq(&pdev->dev, irq, xlp_spi_interrupt, 0,
pdev->name, xspi);
--
2.17.1