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    Subject[PATCH 21/30] hpsa: Add an shost_to_hba helper function.
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    From: Stephen M. Cameron <scameron@beardog.cce.hp.com>

    hpsa: Add an shost_to_hba helper function.

    Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
    ---
    drivers/scsi/hpsa.c | 9 +++++++--
    1 files changed, 7 insertions(+), 2 deletions(-)

    diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
    index 320d686..e81df76 100644
    --- a/drivers/scsi/hpsa.c
    +++ b/drivers/scsi/hpsa.c
    @@ -197,6 +197,12 @@ static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
    return (struct ctlr_info *) *priv;
    }

    +static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
    +{
    + unsigned long *priv = shost_priv(sh);
    + return (struct ctlr_info *) *priv;
    +}
    +
    static struct task_struct *hpsa_scan_thread;
    static DEFINE_MUTEX(hpsa_scan_mutex);
    static LIST_HEAD(hpsa_scan_q);
    @@ -381,8 +387,7 @@ static ssize_t host_store_rescan(struct device *dev,
    {
    struct ctlr_info *h;
    struct Scsi_Host *shost = class_to_shost(dev);
    - unsigned long *priv = shost_priv(shost);
    - h = (struct ctlr_info *) *priv;
    + h = shost_to_hba(shost);
    if (add_to_scan_list(h)) {
    wake_up_process(hpsa_scan_thread);
    wait_for_completion_interruptible(&h->scan_wait);


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