Commit d8d82ac4 authored by Vladimir Zapolskiy's avatar Vladimir Zapolskiy Committed by Greg Kroah-Hartman

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

commit cf9e1672 upstream.

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: 8cb17b5e ("irqchip: Add LPC32xx interrupt controller driver")
Signed-off-by: default avatarVladimir Zapolskiy <vz@mleia.com>
Acked-by: default avatarSylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 86249aef
......@@ -776,7 +776,7 @@ 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;
......
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