ata: ahci_platform: fix owner module reference mismatch for scsi host

The owner module reference of the ahci platform's scsi_host is
initialized to libahci_platform's one, because these drivers use a
scsi_host_template defined in libahci_platform.  So these drivers can
be unloaded even if the scsi device is being accessed.

This fixes it by pushing the scsi_host_template from libahci_platform
to all leaf drivers.  The scsi_host_template is passed through a new
argument of ahci_platform_init_host().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-scsi@vger.kernel.org

drivers/ata/ahci_mvebu.c

@@ -19,6 +19,8 @@
 #include <linux/platform_device.h>
 #include "ahci.h"
 
+#define DRV_NAME "ahci-mvebu"
+
 #define AHCI_VENDOR_SPECIFIC_0_ADDR  0xa0
 #define AHCI_VENDOR_SPECIFIC_0_DATA  0xa4
 
@@ -67,6 +69,10 @@ static const struct ata_port_info ahci_mvebu_port_info = {
 	.port_ops  = &ahci_platform_ops,
 };
 
+static struct scsi_host_template ahci_platform_sht = {
+	AHCI_SHT(DRV_NAME),
+};
+
 static int ahci_mvebu_probe(struct platform_device *pdev)
 {
 	struct ahci_host_priv *hpriv;
@@ -88,7 +94,8 @@ static int ahci_mvebu_probe(struct platform_device *pdev)
 	ahci_mvebu_mbus_config(hpriv, dram);
 	ahci_mvebu_regret_option(hpriv);
 
-	rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info);
+	rc = ahci_platform_init_host(pdev, hpriv, &ahci_mvebu_port_info,
+				     &ahci_platform_sht);
 	if (rc)
 		goto disable_resources;
 
@@ -114,7 +121,7 @@ static struct platform_driver ahci_mvebu_driver = {
 	.probe = ahci_mvebu_probe,
 	.remove = ata_platform_remove_one,
 	.driver = {
-		.name = "ahci-mvebu",
+		.name = DRV_NAME,
 		.of_match_table = ahci_mvebu_of_match,
 	},
 };