libata: kill port_info->sht and ->irq_handler

libata core layer doesn't care about sht or ->irq_handler.  Those are
only of interest to the LLD during initialization.  This is confusing
and has caused several drivers to have duplicate unused initializers
for these fields.

Currently only sata_nv uses these fields.  Make sata_nv use
->private_data, which is supposed to carry LLD-specific information,
instead and kill ->sht and ->irq_handler.  nv_pi_priv structure is
defined and struct literals are used to initialize private_data.
Notational overhead is negligible.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index e7f10a88efe1..88c6fa84ed74 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -748,14 +748,12 @@ struct ata_port_operations {
 };
 
 struct ata_port_info {
-        struct scsi_host_template       *sht;
         unsigned long           flags;
         unsigned long           link_flags;
         unsigned long           pio_mask;
         unsigned long           mwdma_mask;
         unsigned long           udma_mask;
         struct ata_port_operations *port_ops;
-        irq_handler_t           irq_handler;
         void                    *private_data;
 };