From 6be96ac15e4d913e1f48299db083ada5321803b2 Mon Sep 17 00:00:00 2001 From: Mark Lord Date: Thu, 19 Feb 2009 10:38:04 -0500 Subject: [PATCH] sata_mv: fix SoC interrupt breakage For some reason, sata_mv doesn't clear interrupt status during init when it's running on an SoC host adapter. If the bootloader has touched the SATA controller before starting Linux, Linux can end up enabling the SATA interrupt with events pending, which will cause the interrupt to be marked as spurious and then be disabled, which then breaks all further accesses to the controller. This patch makes the SoC path clear interrupt status on init like in the non-SoC case. Signed-off-by: Lennert Buytenhek Signed-off-by: Mark Lord Signed-off-by: Jeff Garzik --- drivers/ata/sata_mv.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 4ae1a4138b47..7007edd2d451 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -3114,19 +3114,17 @@ static int mv_init_host(struct ata_host *host, unsigned int board_idx) writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS); } - if (!IS_SOC(hpriv)) { - /* Clear any currently outstanding host interrupt conditions */ - writelfl(0, mmio + hpriv->irq_cause_ofs); + /* Clear any currently outstanding host interrupt conditions */ + writelfl(0, mmio + hpriv->irq_cause_ofs); - /* and unmask interrupt generation for host regs */ - writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_ofs); + /* and unmask interrupt generation for host regs */ + writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_ofs); - /* - * enable only global host interrupts for now. - * The per-port interrupts get done later as ports are set up. - */ - mv_set_main_irq_mask(host, 0, PCI_ERR); - } + /* + * enable only global host interrupts for now. + * The per-port interrupts get done later as ports are set up. + */ + mv_set_main_irq_mask(host, 0, PCI_ERR); done: return rc; }