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hwrng: xgene - fix handling platform_get_irq

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The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Andrzej Hajda 2015-09-21 15:33:42 +02:00 committed by Herbert Xu
parent 17762c5ace
commit 09185e2756
1 changed files with 4 additions and 3 deletions
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7
drivers/char/hw_random/xgene-rng.c
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@ -344,11 +344,12 @@ static int xgene_rng_probe(struct platform_device *pdev)
if (IS_ERR(ctx->csr_base))
return PTR_ERR(ctx->csr_base);
ctx->irq = platform_get_irq(pdev, 0);
if (ctx->irq < 0) {
rc = platform_get_irq(pdev, 0);
if (rc < 0) {
dev_err(&pdev->dev, "No IRQ resource\n");
return ctx->irq;
return rc;
}
ctx->irq = rc;
dev_dbg(&pdev->dev, "APM X-Gene RNG BASE %p ALARM IRQ %d",
ctx->csr_base, ctx->irq);