forked from luck/tmp_suning_uos_patched
ahci: improve spurious SDB FIS handling
Spurious SDB FIS during NCQ might not contain spurious completions. It could be spurious TF update or invalid async notification. Treat as HSM violation iff a spurious SDB FIS contains spurious completions; otherwise, just whine once about it. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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@ -200,6 +200,7 @@ struct ahci_port_priv {
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/* for NCQ spurious interrupt analysis */
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unsigned int ncq_saw_d2h:1;
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unsigned int ncq_saw_dmas:1;
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unsigned int ncq_saw_sdb:1;
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};
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static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
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@ -1157,23 +1158,31 @@ static void ahci_host_intr(struct ata_port *ap)
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}
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if (status & PORT_IRQ_SDB_FIS) {
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/* SDB FIS containing spurious completions might be
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* dangerous, whine and fail commands with HSM
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* violation. EH will turn off NCQ after several such
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* failures.
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*/
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const __le32 *f = pp->rx_fis + RX_FIS_SDB;
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ata_ehi_push_desc(ehi, "spurious completion during NCQ "
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if (le32_to_cpu(f[1])) {
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/* SDB FIS containing spurious completions
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* might be dangerous, whine and fail commands
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* with HSM violation. EH will turn off NCQ
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* after several such failures.
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*/
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ata_ehi_push_desc(ehi,
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"spurious completions during NCQ "
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"issue=0x%x SAct=0x%x FIS=%08x:%08x",
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readl(port_mmio + PORT_CMD_ISSUE),
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readl(port_mmio + PORT_SCR_ACT),
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le32_to_cpu(f[0]), le32_to_cpu(f[1]));
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ehi->err_mask |= AC_ERR_HSM;
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ehi->action |= ATA_EH_SOFTRESET;
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ata_port_freeze(ap);
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} else {
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if (!pp->ncq_saw_sdb)
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ata_port_printk(ap, KERN_INFO,
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"spurious SDB FIS %08x:%08x during NCQ, "
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"this message won't be printed again\n",
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le32_to_cpu(f[0]), le32_to_cpu(f[1]));
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pp->ncq_saw_sdb = 1;
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}
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known_irq = 1;
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}
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