libata: introduce ata_host->n_tags to avoid oops on SAS controllers

[pandora-kernel.git] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index cafc09a..d773b21 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -392,6 +392,9 @@ enum {
        ATA_HORKAGE_NOSETXFER   = (1 << 14),    /* skip SETXFER, SATA only */
        ATA_HORKAGE_BROKEN_FPDMA_AA     = (1 << 15),    /* skip AA */
        ATA_HORKAGE_DUMP_ID     = (1 << 16),    /* dump IDENTIFY data */
+       ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),  /* Set max sects to 65535 */
+       ATA_HORKAGE_NOLPM       = (1 << 20),    /* don't use LPM */
+       ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),  /* some WDs have broken LPM */
 
         /* DMA mask for user DMA control: User visible values; DO NOT
            renumber */
@@ -537,6 +540,7 @@ struct ata_host {
        struct device           *dev;
        void __iomem * const    *iomap;
        unsigned int            n_ports;
+       unsigned int            n_tags;                 /* nr of NCQ tags */
        void                    *private_data;
        struct ata_port_operations *ops;
        unsigned long           flags;
@@ -760,6 +764,7 @@ struct ata_port {
        unsigned long           qc_allocated;
        unsigned int            qc_active;
        int                     nr_active_links; /* #links with active qcs */
+       unsigned int            last_tag;       /* track next tag hw expects */
 
        struct ata_link         link;           /* host default link */
        struct ata_link         *slave_link;    /* see ata_slave_link_init() */