Interestingly, sata_sil raises spurious interrupts if it's coupled with Sil SATA_PATA bridge. Currently, sata_sil interrupt handler is strict about spurious interrupts and freezes the port when it occurs. This patch makes it more forgiving. * On SATA PHY event interrupt, serror value is checked to see whether it really is PHYRDY CHG event. If not, SATA PHY event interrupt is ignored. * If ATA interrupt occurs while no command is in progress, it's cleared and ignored. This fixes bugzilla bug 9505. http://bugzilla.kernel.org/show_bug.cgi?id=9505 Signed-off-by: Tejun Heo <htejun@xxxxxxxxx> --- drivers/ata/sata_sil.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) Index: work/drivers/ata/sata_sil.c =================================================================== --- work.orig/drivers/ata/sata_sil.c +++ work/drivers/ata/sata_sil.c @@ -390,23 +390,28 @@ static void sil_host_intr(struct ata_por sil_scr_read(ap, SCR_ERROR, &serror); sil_scr_write(ap, SCR_ERROR, serror); - /* Trigger hotplug and accumulate SError only if the - * port isn't already frozen. Otherwise, PHY events - * during hardreset makes controllers with broken SIEN - * repeat probing needlessly. + /* Sometimes spurious interrupts occur, double check + * it's PHYRDY CHG. */ - if (!(ap->pflags & ATA_PFLAG_FROZEN)) { - ata_ehi_hotplugged(&ap->link.eh_info); - ap->link.eh_info.serror |= serror; + if (serror & SERR_PHYRDY_CHG) { + /* Trigger hotplug and accumulate SError only + * if the port isn't already frozen. + * Otherwise, PHY events during hardreset + * makes controllers with broken SIEN repeat + * probing needlessly. + */ + if (!(ap->pflags & ATA_PFLAG_FROZEN)) { + ata_ehi_hotplugged(&ap->link.eh_info); + ap->link.eh_info.serror |= serror; + } + goto freeze; } - goto freeze; + if (!(bmdma2 & SIL_DMA_COMPLETE)) + return; } - if (unlikely(!qc)) - goto freeze; - - if (unlikely(qc->tf.flags & ATA_TFLAG_POLLING)) { + if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) { /* this sometimes happens, just clear IRQ */ ata_chk_status(ap); return; - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
