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authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 15:35:47 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 15:35:47 -0800
commit67acd8b4b7a3f1b183ae358e1dfdb8a80e170736 (patch)
tree4418034f6e83f954337a17bc6a872fa5ae3c4b5e /drivers/scsi
parentb13d3720ecd29d5044334fdbbae3432f26802bae (diff)
parentad160d23198193135cb2bcc75222e0816b5838c0 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async
* git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async: async: don't do the initcall stuff post boot bootchart: improve output based on Dave Jones' feedback async: make the final inode deletion an asynchronous event fastboot: Make libata initialization even more async fastboot: make the libata port scan asynchronous fastboot: make scsi probes asynchronous async: Asynchronous function calls to speed up kernel boot
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_scan.c3
-rw-r--r--drivers/scsi/sd.c109
2 files changed, 70 insertions, 42 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 18486b51668d..17914a346f71 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -32,6 +32,7 @@
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/spinlock.h>
+#include <linux/async.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -179,6 +180,8 @@ int scsi_complete_async_scans(void)
spin_unlock(&async_scan_lock);
kfree(data);
+ /* Synchronize async operations globally */
+ async_synchronize_full();
return 0;
}
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 62b28d58e65e..e035c1114010 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -48,6 +48,7 @@
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/string_helpers.h>
+#include <linux/async.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
@@ -1802,6 +1803,71 @@ static int sd_format_disk_name(char *prefix, int index, char *buf, int buflen)
return 0;
}
+/*
+ * The asynchronous part of sd_probe
+ */
+static void sd_probe_async(void *data, async_cookie_t cookie)
+{
+ struct scsi_disk *sdkp = data;
+ struct scsi_device *sdp;
+ struct gendisk *gd;
+ u32 index;
+ struct device *dev;
+
+ sdp = sdkp->device;
+ gd = sdkp->disk;
+ index = sdkp->index;
+ dev = &sdp->sdev_gendev;
+
+ if (!sdp->request_queue->rq_timeout) {
+ if (sdp->type != TYPE_MOD)
+ blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
+ else
+ blk_queue_rq_timeout(sdp->request_queue,
+ SD_MOD_TIMEOUT);
+ }
+
+ device_initialize(&sdkp->dev);
+ sdkp->dev.parent = &sdp->sdev_gendev;
+ sdkp->dev.class = &sd_disk_class;
+ strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE);
+
+ if (device_add(&sdkp->dev))
+ goto out_free_index;
+
+ get_device(&sdp->sdev_gendev);
+
+ if (index < SD_MAX_DISKS) {
+ gd->major = sd_major((index & 0xf0) >> 4);
+ gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
+ gd->minors = SD_MINORS;
+ }
+ gd->fops = &sd_fops;
+ gd->private_data = &sdkp->driver;
+ gd->queue = sdkp->device->request_queue;
+
+ sd_revalidate_disk(gd);
+
+ blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
+
+ gd->driverfs_dev = &sdp->sdev_gendev;
+ gd->flags = GENHD_FL_EXT_DEVT | GENHD_FL_DRIVERFS;
+ if (sdp->removable)
+ gd->flags |= GENHD_FL_REMOVABLE;
+
+ dev_set_drvdata(dev, sdkp);
+ add_disk(gd);
+ sd_dif_config_host(sdkp);
+
+ sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
+ sdp->removable ? "removable " : "");
+
+ return;
+
+ out_free_index:
+ ida_remove(&sd_index_ida, index);
+}
+
/**
* sd_probe - called during driver initialization and whenever a
* new scsi device is attached to the system. It is called once
@@ -1865,48 +1931,7 @@ static int sd_probe(struct device *dev)
sdkp->openers = 0;
sdkp->previous_state = 1;
- if (!sdp->request_queue->rq_timeout) {
- if (sdp->type != TYPE_MOD)
- blk_queue_rq_timeout(sdp->request_queue, SD_TIMEOUT);
- else
- blk_queue_rq_timeout(sdp->request_queue,
- SD_MOD_TIMEOUT);
- }
-
- device_initialize(&sdkp->dev);
- sdkp->dev.parent = &sdp->sdev_gendev;
- sdkp->dev.class = &sd_disk_class;
- strncpy(sdkp->dev.bus_id, sdp->sdev_gendev.bus_id, BUS_ID_SIZE);
-
- if (device_add(&sdkp->dev))
- goto out_free_index;
-
- get_device(&sdp->sdev_gendev);
-
- if (index < SD_MAX_DISKS) {
- gd->major = sd_major((index & 0xf0) >> 4);
- gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
- gd->minors = SD_MINORS;
- }
- gd->fops = &sd_fops;
- gd->private_data = &sdkp->driver;
- gd->queue = sdkp->device->request_queue;
-
- sd_revalidate_disk(gd);
-
- blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
-
- gd->driverfs_dev = &sdp->sdev_gendev;
- gd->flags = GENHD_FL_EXT_DEVT | GENHD_FL_DRIVERFS;
- if (sdp->removable)
- gd->flags |= GENHD_FL_REMOVABLE;
-
- dev_set_drvdata(dev, sdkp);
- add_disk(gd);
- sd_dif_config_host(sdkp);
-
- sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
- sdp->removable ? "removable " : "");
+ async_schedule(sd_probe_async, sdkp);
return 0;