target/linux/oxnas/patches-4.0/999-libata-hacks.patch

   1 Index: linux-4.0-rc4/drivers/ata/libata-core.c
   2 ===================================================================
   3 --- linux-4.0-rc4.orig/drivers/ata/libata-core.c
   4 +++ linux-4.0-rc4/drivers/ata/libata-core.c
   5 @@ -1586,6 +1586,14 @@ unsigned ata_exec_internal_sg(struct ata
   6                 return AC_ERR_SYSTEM;
   7         }
   8
   9 +       if (ap->ops->acquire_hw && !ap->ops->acquire_hw(ap, 0, 0)) {
  10 +               spin_unlock_irqrestore(ap->lock, flags);
  11 +               if (!ap->ops->acquire_hw(ap, 1, (2*HZ))) {
  12 +                       return AC_ERR_TIMEOUT;
  13 +               }
  14 +               spin_lock_irqsave(ap->lock, flags);
  15 +       }
  16 +
  17         /* initialize internal qc */
  18
  19         /* XXX: Tag 0 is used for drivers with legacy EH as some
  20 @@ -4749,6 +4757,9 @@ struct ata_queued_cmd *ata_qc_new_init(s
  21         if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
  22                 return NULL;
  23
  24 +       if (ap->ops->qc_new && ap->ops->qc_new(ap))
  25 +               return NULL;
  26 +
  27         /* libsas case */
  28         if (!ap->scsi_host) {
  29                 tag = ata_sas_allocate_tag(ap);
  30 @@ -4794,6 +4805,8 @@ void ata_qc_free(struct ata_queued_cmd *
  31                 qc->tag = ATA_TAG_POISON;
  32                 if (!ap->scsi_host)
  33                         ata_sas_free_tag(tag, ap);
  34 +               if (ap->ops->qc_free)
  35 +                       ap->ops->qc_free(qc);
  36         }
  37  }
  38
  39 Index: linux-4.0-rc4/include/linux/libata.h
  40 ===================================================================
  41 --- linux-4.0-rc4.orig/include/linux/libata.h
  42 +++ linux-4.0-rc4/include/linux/libata.h
  43 @@ -893,6 +893,8 @@ struct ata_port_operations {
  44         void (*qc_prep)(struct ata_queued_cmd *qc);
  45         unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
  46         bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
  47 +       int (*qc_new)(struct ata_port *ap);
  48 +       void (*qc_free)(struct ata_queued_cmd *qc);
  49
  50         /*
  51          * Configuration and exception handling
  52 @@ -983,6 +985,9 @@ struct ata_port_operations {
  53         void (*phy_reset)(struct ata_port *ap);
  54         void (*eng_timeout)(struct ata_port *ap);
  55
  56 +       int (*acquire_hw)(struct ata_port *ap, int may_sleep,
  57 +                         int timeout_jiffies);
  58 +
  59         /*
  60          * ->inherits must be the last field and all the preceding
  61          * fields must be pointers.