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Subject[PATCH] gpu: host1x: fix error return code in host1x_probe()
platform_get_irq() returns an error code, but the host1x driver
ignores it and always returns -ENXIO. 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>
---
drivers/gpu/host1x/dev.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c
index 7782725..7f22c5c 100644
--- a/drivers/gpu/host1x/dev.c
+++ b/drivers/gpu/host1x/dev.c
@@ -134,8 +134,8 @@ static int host1x_probe(struct platform_device *pdev)

syncpt_irq = platform_get_irq(pdev, 0);
if (syncpt_irq < 0) {
- dev_err(&pdev->dev, "failed to get IRQ\n");
- return -ENXIO;
+ dev_err(&pdev->dev, "failed to get IRQ: %d\n", syncpt_irq);
+ return syncpt_irq;
}

host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
--
2.5.0
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