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Subject[PATCH v3] scsi_debug: Convert to use root_device_register() and root_device_unregister()
Date
From: Nicholas Bellinger <nab@linux-iscsi.org>

Hi Doug and Co,

This patch updates the scsi_debug virtual LLD to use root_device_register()
and root_device_unregister() from include/linux/device.h instead of device_register()
and device_unregister() respectively within scsi_debug_init() and scsi_debug_exit()
This simply involved converting the static struct device pseudo_primary into a
pointer that is setup by the call to root_device_register().

This patch also contains the correct IS_ERR() conditional check of
root_device_register() from within scsi_debug_init().

Thanks to Richard Sharpe and Dmitry Torokhov for their help with this item.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/scsi/scsi_debug.c | 25 ++++++++-----------------
1 files changed, 8 insertions(+), 17 deletions(-)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index b02bdc6..6047c10 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -3207,16 +3207,7 @@ static void do_remove_driverfs_files(void)
driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
}

-static void pseudo_0_release(struct device *dev)
-{
- if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
- printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
-}
-
-static struct device pseudo_primary = {
- .init_name = "pseudo_0",
- .release = pseudo_0_release,
-};
+struct device *pseudo_primary;

static int __init scsi_debug_init(void)
{
@@ -3352,10 +3343,10 @@ static int __init scsi_debug_init(void)
map_region(0, 2);
}

- ret = device_register(&pseudo_primary);
- if (ret < 0) {
- printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
- ret);
+ pseudo_primary = root_device_register("pseudo_0");
+ if (IS_ERR(pseudo_primary)) {
+ printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
+ ret = PTR_ERR(pseudo_primary);
goto free_vm;
}
ret = bus_register(&pseudo_lld_bus);
@@ -3402,7 +3393,7 @@ del_files:
bus_unreg:
bus_unregister(&pseudo_lld_bus);
dev_unreg:
- device_unregister(&pseudo_primary);
+ root_device_unregister(pseudo_primary);
free_vm:
if (map_storep)
vfree(map_storep);
@@ -3423,7 +3414,7 @@ static void __exit scsi_debug_exit(void)
do_remove_driverfs_files();
driver_unregister(&sdebug_driverfs_driver);
bus_unregister(&pseudo_lld_bus);
- device_unregister(&pseudo_primary);
+ root_device_unregister(pseudo_primary);

if (dif_storep)
vfree(dif_storep);
@@ -3474,7 +3465,7 @@ static int sdebug_add_adapter(void)
spin_unlock(&sdebug_host_list_lock);

sdbg_host->dev.bus = &pseudo_lld_bus;
- sdbg_host->dev.parent = &pseudo_primary;
+ sdbg_host->dev.parent = pseudo_primary;
sdbg_host->dev.release = &sdebug_release_adapter;
dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);

--
1.5.6.5


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