libata: update libata core layer to use devres

Update libata core layer to use devres.

* ata_device_add() acquires all resources in managed mode.

* ata_host is allocated as devres associated with ata_host_release.

* Port attached status is handled as devres associated with
  ata_host_attach_release().

* Initialization failure and host removal is handedl by releasing
  devres group.

* Except for ata_scsi_release() removal, LLD interface remains the
  same.  Some functions use hacky is_managed test to support both
  managed and unmanaged devices.  These will go away once all LLDs are
  updated to use devres.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index e9a0cfdcfe2c..f96277ed184f 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -31,7 +31,7 @@
 #include <linux/pci.h>
 #include <linux/dma-mapping.h>
 #include <asm/scatterlist.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <linux/ata.h>
 #include <linux/workqueue.h>
 #include <scsi/scsi_host.h>
@@ -726,7 +726,6 @@ extern void ata_host_remove(struct ata_host *host);
 extern int ata_scsi_detect(struct scsi_host_template *sht);
 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
-extern int ata_scsi_release(struct Scsi_Host *host);
 extern void ata_sas_port_destroy(struct ata_port *);
 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
                                            struct ata_port_info *, struct Scsi_Host *);
@@ -1227,14 +1226,14 @@ static inline unsigned int __ac_err_mask(u8 status)
 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
 {
         ap->pad_dma = 0;
-        ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
-                                     &ap->pad_dma, GFP_KERNEL);
+        ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
+                                      &ap->pad_dma, GFP_KERNEL);
         return (ap->pad == NULL) ? -ENOMEM : 0;
 }
 
 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
 {
-        dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
+        dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
 }
 
 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)