The driver overrides the error codes returned by platform_get_irq() to -ENXIO, so if it returns -EPROBE_DEFER, the driver would fail the probe permanently instead of the deferred probing. Switch to propagating the error code upstream, still checking/overriding IRQ0 as libata regards it as "no IRQ" (thus polling) anyway... Fixes: 2fff27512600 ("PATA host controller driver for ep93xx") Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx> --- This patch is against the 'master' branch of Jens Axboe's 'linux-block.git' repo. drivers/ata/pata_ep93xx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) Index: linux-block/drivers/ata/pata_ep93xx.c =================================================================== --- linux-block.orig/drivers/ata/pata_ep93xx.c +++ linux-block/drivers/ata/pata_ep93xx.c @@ -928,7 +928,11 @@ static int ep93xx_pata_probe(struct plat /* INT[3] (IRQ_EP93XX_EXT3) line connected as pull down */ irq = platform_get_irq(pdev, 0); if (irq < 0) { - err = -ENXIO; + err = irq; + goto err_rel_gpio; + } + if (!irq) { + err = -EINVAL; goto err_rel_gpio; }