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mtd: nand: lpc32xx: fix invalid error handling of a requested irq 

Semantics of NR_IRQS is different on machines with SPARSE_IRQ option
disabled or enabled, in the latter case IRQs are allocated starting
at least from the value specified by NR_IRQS and going upwards, so
the check of (irq >= NR_IRQ) to decide about an error code returned by
platform_get_irq() is completely invalid, don't attempt to overrule
irq subsystem in the driver.

The change fixes LPC32xx NAND MLC driver initialization on boot.

Fixes: 8cb17b5ed0 ("irqchip: Add LPC32xx interrupt controller driver")
Cc: stable@kernel.org # v4.7+
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Vladimir Zapolskiy 2016-12-05 03:47:10 +02:00 committed by Boris Brezillon
parent 8043d25b3c
commit cf9e1672a6
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/lpc32xx_mlc.c
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@ -775,7 +775,7 @@ static int lpc32xx_nand_probe(struct platform_device *pdev)
init_completion(&host->comp_controller);
host->irq = platform_get_irq(pdev, 0);
if ((host->irq < 0) || (host->irq >= NR_IRQS)) {
if (host->irq < 0) {
dev_err(&pdev->dev, "failed to get platform irq\n");
res = -EINVAL;
goto err_exit3;