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Message-ID: <20090917184831.15105.21502.stgit@beardog.cce.hp.com>
Date: Thu, 17 Sep 2009 13:48:31 -0500
From: "Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
To: akpm@...ux-foundation.org, axboe@...nel.dk
Cc: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
andrew.patterson@...com, mikem@...rdog.cce.hp.com,
scameron@...rdog.cce.hp.com
Subject: [PATCH 20/20] cciss: Dynamically allocate the drive_info_struct for
each logical drive.
cciss: Dynamically allocate the drive_info_struct for each logical drive.
This reduces the size of the per-hba ctlr_info structure from 106936
bytes to 8132 bytes. That's on 32-bit systems. On 64-bit systems, the
improvement is even bigger. Without this, the ctlr_info struct is so big
that the driver won't even load on a 64 bit system if CISS_MAX_LUN was
at it's current setting of 1024 logical drives.
Signed-off-by: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
---
drivers/block/cciss.c | 293 ++++++++++++++++++++++++++++---------------------
drivers/block/cciss.h | 5 +
2 files changed, 168 insertions(+), 130 deletions(-)
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index f3f30c5..3c74ddf 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -200,6 +200,7 @@ static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
static void cciss_hba_release(struct device *dev);
static void cciss_device_release(struct device *dev);
static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
+static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
#ifdef CONFIG_PROC_FS
static void cciss_procinit(int i);
@@ -326,7 +327,7 @@ static int cciss_seq_show(struct seq_file *seq, void *v)
ctlr_info_t *h = seq->private;
unsigned ctlr = h->ctlr;
loff_t *pos = v;
- drive_info_struct *drv = &h->drv[*pos];
+ drive_info_struct *drv = h->drv[*pos];
if (*pos > h->highest_lun)
return 0;
@@ -460,6 +461,7 @@ static void __devinit cciss_procinit(int i)
#define MAX_PRODUCT_NAME_LEN 19
#define to_hba(n) container_of(n, struct ctlr_info, dev)
+#define to_drv(n) container_of(n, drive_info_struct, dev)
static ssize_t host_store_rescan(struct device *dev,
struct device_attribute *attr,
@@ -479,8 +481,8 @@ static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
__u8 sn[16];
unsigned long flags;
int ret = 0;
@@ -509,8 +511,8 @@ static ssize_t dev_show_vendor(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
char vendor[VENDOR_LEN + 1];
unsigned long flags;
int ret = 0;
@@ -533,8 +535,8 @@ static ssize_t dev_show_model(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
char model[MODEL_LEN + 1];
unsigned long flags;
int ret = 0;
@@ -557,8 +559,8 @@ static ssize_t dev_show_rev(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
char rev[REV_LEN + 1];
unsigned long flags;
int ret = 0;
@@ -580,8 +582,8 @@ DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
static ssize_t cciss_show_lunid(struct device *dev,
struct device_attribute *attr, char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
unsigned long flags;
unsigned char lunid[8];
@@ -605,8 +607,8 @@ DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
static ssize_t cciss_show_raid_level(struct device *dev,
struct device_attribute *attr, char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
int raid;
unsigned long flags;
@@ -628,8 +630,8 @@ DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
static ssize_t cciss_show_usage_count(struct device *dev,
struct device_attribute *attr, char *buf)
{
- drive_info_struct *drv = dev_get_drvdata(dev);
- struct ctlr_info *h = to_hba(drv->dev->parent);
+ drive_info_struct *drv = to_drv(dev);
+ struct ctlr_info *h = to_hba(drv->dev.parent);
unsigned long flags;
int count;
@@ -732,11 +734,12 @@ static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
}
/* cciss_device_release is called when the reference count
- * of h->drv[x].dev goes to zero.
+ * of h->drv[x]dev goes to zero.
*/
static void cciss_device_release(struct device *dev)
{
- kfree(dev);
+ drive_info_struct *drv = to_drv(dev);
+ kfree(drv);
}
/*
@@ -750,20 +753,16 @@ static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
{
struct device *dev;
- /* Special case for c*d0, we only create it once. */
- if (drv_index == 0 && h->drv[drv_index].dev != NULL)
+ if (h->drv[drv_index]->device_initialized)
return 0;
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
+ dev = &h->drv[drv_index]->dev;
device_initialize(dev);
dev->type = &cciss_dev_type;
dev->bus = &cciss_bus_type;
dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
dev->parent = &h->dev;
- h->drv[drv_index].dev = dev;
- dev_set_drvdata(dev, &h->drv[drv_index]);
+ h->drv[drv_index]->device_initialized = 1;
return device_add(dev);
}
@@ -773,7 +772,7 @@ static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
int ctlr_exiting)
{
- struct device *dev = h->drv[drv_index].dev;
+ struct device *dev = &h->drv[drv_index]->dev;
/* special case for c*d0, we only destroy it on controller exit */
if (drv_index == 0 && !ctlr_exiting)
@@ -781,7 +780,7 @@ static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
device_del(dev);
put_device(dev); /* the "final" put. */
- h->drv[drv_index].dev = NULL;
+ h->drv[drv_index] = NULL;
}
/*
@@ -1624,7 +1623,10 @@ static void cciss_check_queues(ctlr_info_t *h)
/* make sure the disk has been added and the drive is real
* because this can be called from the middle of init_one.
*/
- if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
+ if (!h->drv[curr_queue])
+ continue;
+ if (!(h->drv[curr_queue]->queue) ||
+ !(h->drv[curr_queue]->heads))
continue;
blk_start_queue(h->gendisk[curr_queue]->queue);
@@ -1684,8 +1686,8 @@ static void cciss_softirq_done(struct request *rq)
static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
unsigned char scsi3addr[], uint32_t log_unit)
{
- memcpy(scsi3addr, h->drv[log_unit].LunID,
- sizeof(h->drv[log_unit].LunID));
+ memcpy(scsi3addr, h->drv[log_unit]->LunID,
+ sizeof(h->drv[log_unit]->LunID));
}
/* This function gets the SCSI vendor, model, and revision of a logical drive
@@ -1775,12 +1777,10 @@ static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
disk->major = h->major;
disk->first_minor = drv_index << NWD_SHIFT;
disk->fops = &cciss_fops;
- if (h->drv[drv_index].dev == NULL) {
- if (cciss_create_ld_sysfs_entry(h, drv_index))
- goto cleanup_queue;
- }
- disk->private_data = &h->drv[drv_index];
- disk->driverfs_dev = h->drv[drv_index].dev;
+ if (cciss_create_ld_sysfs_entry(h, drv_index))
+ goto cleanup_queue;
+ disk->private_data = h->drv[drv_index];
+ disk->driverfs_dev = &h->drv[drv_index]->dev;
/* Set up queue information */
blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
@@ -1798,13 +1798,13 @@ static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
disk->queue->queuedata = h;
blk_queue_logical_block_size(disk->queue,
- h->drv[drv_index].block_size);
+ h->drv[drv_index]->block_size);
/* Make sure all queue data is written out before */
- /* setting h->drv[drv_index].queue, as setting this */
+ /* setting h->drv[drv_index]->queue, as setting this */
/* allows the interrupt handler to start the queue */
wmb();
- h->drv[drv_index].queue = disk->queue;
+ h->drv[drv_index]->queue = disk->queue;
add_disk(disk);
return 0;
@@ -1839,7 +1839,7 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
/* Get information about the disk and modify the driver structure */
inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
- drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
+ drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
if (inq_buff == NULL || drvinfo == NULL)
goto mem_msg;
@@ -1875,16 +1875,19 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
drvinfo->model, drvinfo->rev);
cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
sizeof(drvinfo->serial_no));
+ /* Save the lunid in case we deregister the disk, below. */
+ memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
+ sizeof(drvinfo->LunID));
/* Is it the same disk we already know, and nothing's changed? */
- if (h->drv[drv_index].raid_level != -1 &&
+ if (h->drv[drv_index]->raid_level != -1 &&
((memcmp(drvinfo->serial_no,
- h->drv[drv_index].serial_no, 16) == 0) &&
- drvinfo->block_size == h->drv[drv_index].block_size &&
- drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
- drvinfo->heads == h->drv[drv_index].heads &&
- drvinfo->sectors == h->drv[drv_index].sectors &&
- drvinfo->cylinders == h->drv[drv_index].cylinders))
+ h->drv[drv_index]->serial_no, 16) == 0) &&
+ drvinfo->block_size == h->drv[drv_index]->block_size &&
+ drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
+ drvinfo->heads == h->drv[drv_index]->heads &&
+ drvinfo->sectors == h->drv[drv_index]->sectors &&
+ drvinfo->cylinders == h->drv[drv_index]->cylinders))
/* The disk is unchanged, nothing to update */
goto freeret;
@@ -1894,18 +1897,17 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
* If the disk already exists then deregister it before proceeding
* (unless it's the first disk (for the controller node).
*/
- if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
+ if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
printk(KERN_WARNING "disk %d has changed.\n", drv_index);
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
- h->drv[drv_index].busy_configuring = 1;
+ h->drv[drv_index]->busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
- /* deregister_disk sets h->drv[drv_index].queue = NULL
+ /* deregister_disk sets h->drv[drv_index]->queue = NULL
* which keeps the interrupt handler from starting
* the queue.
*/
ret = deregister_disk(h, drv_index, 0, via_ioctl);
- h->drv[drv_index].busy_configuring = 0;
}
/* If the disk is in use return */
@@ -1913,22 +1915,31 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
goto freeret;
/* Save the new information from cciss_geometry_inquiry
- * and serial number inquiry.
+ * and serial number inquiry. If the disk was deregistered
+ * above, then h->drv[drv_index] will be NULL.
*/
- h->drv[drv_index].block_size = drvinfo->block_size;
- h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
- h->drv[drv_index].heads = drvinfo->heads;
- h->drv[drv_index].sectors = drvinfo->sectors;
- h->drv[drv_index].cylinders = drvinfo->cylinders;
- h->drv[drv_index].raid_level = drvinfo->raid_level;
- memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
- memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
- memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
- memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
+ if (h->drv[drv_index] == NULL) {
+ drvinfo->device_initialized = 0;
+ h->drv[drv_index] = drvinfo;
+ drvinfo = NULL; /* so it won't be freed below. */
+ } else {
+ /* special case for cxd0 */
+ h->drv[drv_index]->block_size = drvinfo->block_size;
+ h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
+ h->drv[drv_index]->heads = drvinfo->heads;
+ h->drv[drv_index]->sectors = drvinfo->sectors;
+ h->drv[drv_index]->cylinders = drvinfo->cylinders;
+ h->drv[drv_index]->raid_level = drvinfo->raid_level;
+ memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
+ memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
+ VENDOR_LEN + 1);
+ memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
+ memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
+ }
++h->num_luns;
disk = h->gendisk[drv_index];
- set_capacity(disk, h->drv[drv_index].nr_blocks);
+ set_capacity(disk, h->drv[drv_index]->nr_blocks);
/* If it's not disk 0 (drv_index != 0)
* or if it was disk 0, but there was previously
@@ -1939,6 +1950,7 @@ static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
if (drv_index || first_time) {
if (cciss_add_disk(h, disk, drv_index) != 0) {
cciss_free_gendisk(h, drv_index);
+ cciss_free_drive_info(h, drv_index);
printk(KERN_WARNING "cciss:%d could not update "
"disk %d\n", h->ctlr, drv_index);
--h->num_luns;
@@ -1955,28 +1967,64 @@ mem_msg:
}
/* This function will find the first index of the controllers drive array
- * that has a -1 for the raid_level and will return that index. This is
- * where new drives will be added. If the index to be returned is greater
- * than the highest_lun index for the controller then highest_lun is set
- * to this new index. If there are no available indexes then -1 is returned.
- * "controller_node" is used to know if this is a real logical drive, or just
- * the controller node, which determines if this counts towards highest_lun.
+ * that has a null drv pointer and allocate the drive info struct and
+ * will return that index This is where new drives will be added.
+ * If the index to be returned is greater than the highest_lun index for
+ * the controller then highest_lun is set * to this new index.
+ * If there are no available indexes or if tha allocation fails, then -1
+ * is returned. * "controller_node" is used to know if this is a real
+ * logical drive, or just the controller node, which determines if this
+ * counts towards highest_lun.
*/
-static int cciss_find_free_drive_index(int ctlr, int controller_node)
+static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
{
int i;
+ drive_info_struct *drv;
+ /* Search for an empty slot for our drive info */
for (i = 0; i < CISS_MAX_LUN; i++) {
- if (hba[ctlr]->drv[i].raid_level == -1) {
- if (i > hba[ctlr]->highest_lun)
- if (!controller_node)
- hba[ctlr]->highest_lun = i;
+
+ /* if not cxd0 case, and it's occupied, skip it. */
+ if (h->drv[i] && i != 0)
+ continue;
+ /*
+ * If it's cxd0 case, and drv is alloc'ed already, and a
+ * disk is configured there, skip it.
+ */
+ if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
+ continue;
+
+ /*
+ * We've found an empty slot. Update highest_lun
+ * provided this isn't just the fake cxd0 controller node.
+ */
+ if (i > h->highest_lun && !controller_node)
+ h->highest_lun = i;
+
+ /* If adding a real disk at cxd0, and it's already alloc'ed */
+ if (i == 0 && h->drv[i] != NULL)
return i;
- }
+
+ /*
+ * Found an empty slot, not already alloc'ed. Allocate it.
+ * Mark it with raid_level == -1, so we know it's new later on.
+ */
+ drv = kzalloc(sizeof(*drv), GFP_KERNEL);
+ if (!drv)
+ return -1;
+ drv->raid_level = -1; /* so we know it's new */
+ h->drv[i] = drv;
+ return i;
}
return -1;
}
+static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
+{
+ kfree(h->drv[drv_index]);
+ h->drv[drv_index] = NULL;
+}
+
static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
{
put_disk(h->gendisk[drv_index]);
@@ -1997,7 +2045,7 @@ static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
{
int drv_index;
- drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
+ drv_index = cciss_alloc_drive_info(h, controller_node);
if (drv_index == -1)
return -1;
@@ -2009,24 +2057,24 @@ static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
printk(KERN_ERR "cciss%d: could not "
"allocate a new disk %d\n",
h->ctlr, drv_index);
- return -1;
+ goto err_free_drive_info;
}
}
- memcpy(h->drv[drv_index].LunID, lunid,
- sizeof(h->drv[drv_index].LunID));
- if (h->drv[drv_index].dev == NULL) {
- if (cciss_create_ld_sysfs_entry(h, drv_index))
- goto err_free_disk;
- }
+ memcpy(h->drv[drv_index]->LunID, lunid,
+ sizeof(h->drv[drv_index]->LunID));
+ if (cciss_create_ld_sysfs_entry(h, drv_index))
+ goto err_free_disk;
/* Don't need to mark this busy because nobody */
/* else knows about this disk yet to contend */
/* for access to it. */
- h->drv[drv_index].busy_configuring = 0;
+ h->drv[drv_index]->busy_configuring = 0;
wmb();
return drv_index;
err_free_disk:
cciss_free_gendisk(h, drv_index);
+err_free_drive_info:
+ cciss_free_drive_info(h, drv_index);
return -1;
}
@@ -2046,17 +2094,18 @@ static void cciss_add_controller_node(ctlr_info_t *h)
drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
if (drv_index == -1)
goto error;
- h->drv[drv_index].block_size = 512;
- h->drv[drv_index].nr_blocks = 0;
- h->drv[drv_index].heads = 0;
- h->drv[drv_index].sectors = 0;
- h->drv[drv_index].cylinders = 0;
- h->drv[drv_index].raid_level = -1;
- memset(h->drv[drv_index].serial_no, 0, 16);
+ h->drv[drv_index]->block_size = 512;
+ h->drv[drv_index]->nr_blocks = 0;
+ h->drv[drv_index]->heads = 0;
+ h->drv[drv_index]->sectors = 0;
+ h->drv[drv_index]->cylinders = 0;
+ h->drv[drv_index]->raid_level = -1;
+ memset(h->drv[drv_index]->serial_no, 0, 16);
disk = h->gendisk[drv_index];
if (cciss_add_disk(h, disk, drv_index) == 0)
return;
cciss_free_gendisk(h, drv_index);
+ cciss_free_drive_info(h, drv_index);
error:
printk(KERN_WARNING "cciss%d: could not "
"add disk 0.\n", h->ctlr);
@@ -2135,12 +2184,12 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
drv_found = 0;
/* skip holes in the array from already deleted drives */
- if (h->drv[i].raid_level == -1)
+ if (h->drv[i] == NULL)
continue;
for (j = 0; j < num_luns; j++) {
memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
- if (memcmp(h->drv[i].LunID, lunid,
+ if (memcmp(h->drv[i]->LunID, lunid,
sizeof(lunid)) == 0) {
drv_found = 1;
break;
@@ -2149,10 +2198,11 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
if (!drv_found) {
/* Deregister it from the OS, it's gone. */
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
- h->drv[i].busy_configuring = 1;
+ h->drv[i]->busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return_code = deregister_disk(h, i, 1, via_ioctl);
- h->drv[i].busy_configuring = 0;
+ if (h->drv[i] != NULL)
+ h->drv[i]->busy_configuring = 0;
}
}
@@ -2173,9 +2223,9 @@ static int rebuild_lun_table(ctlr_info_t *h, int first_time,
* the first free index and add it.
*/
for (j = 0; j <= h->highest_lun; j++) {
- if (h->drv[j].raid_level != -1 &&
- memcmp(h->drv[j].LunID, lunid,
- sizeof(h->drv[j].LunID)) == 0) {
+ if (h->drv[j] != NULL &&
+ memcmp(h->drv[j]->LunID, lunid,
+ sizeof(h->drv[j]->LunID)) == 0) {
drv_index = j;
drv_found = 1;
break;
@@ -2252,11 +2302,12 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
int i;
struct gendisk *disk;
drive_info_struct *drv;
+ int recalculate_highest_lun;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
- drv = &h->drv[drv_index];
+ drv = h->drv[drv_index];
disk = h->gendisk[drv_index];
/* make sure logical volume is NOT is use */
@@ -2266,6 +2317,8 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
} else if (drv->usage_count > 0)
return -EBUSY;
+ recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
+
/* invalidate the devices and deregister the disk. If it is disk
* zero do not deregister it but just zero out it's values. This
* allows us to delete disk zero but keep the controller registered.
@@ -2276,14 +2329,8 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
del_gendisk(disk);
}
- if (q) {
+ if (q)
blk_cleanup_queue(q);
- /* Set drv->queue to NULL so that we do not try
- * to call blk_start_queue on this queue in the
- * interrupt handler
- */
- drv->queue = NULL;
- }
/* If clear_all is set then we are deleting the logical
* drive, not just refreshing its info. For drives
* other than disk 0 we will call put_disk. We do not
@@ -2306,24 +2353,20 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
}
} else {
set_capacity(disk, 0);
+ cciss_clear_drive_info(drv);
}
--h->num_luns;
- cciss_clear_drive_info(drv);
-
- if (clear_all) {
- /* check to see if it was the last disk */
- if (drv == h->drv + h->highest_lun) {
- /* if so, find the new hightest lun */
- int i, newhighest = -1;
- for (i = 0; i <= h->highest_lun; i++) {
- /* if the disk has size > 0, it is available */
- if (h->drv[i].heads)
- newhighest = i;
- }
- h->highest_lun = newhighest;
+
+ /* if it was the last disk, find the new hightest lun */
+ if (clear_all && recalculate_highest_lun) {
+ int i, newhighest = -1;
+ for (i = 0; i <= h->highest_lun; i++) {
+ /* if the disk has size > 0, it is available */
+ if (h->drv[i] && h->drv[i]->heads)
+ newhighest = i;
}
- memset(drv->LunID, 0, sizeof(drv->LunID));
+ h->highest_lun = newhighest;
}
return 0;
}
@@ -2754,7 +2797,7 @@ static int cciss_revalidate(struct gendisk *disk)
InquiryData_struct *inq_buff = NULL;
for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
- if (memcmp(h->drv[logvol].LunID, drv->LunID,
+ if (memcmp(h->drv[logvol]->LunID, drv->LunID,
sizeof(drv->LunID)) == 0) {
FOUND = 1;
break;
@@ -4292,8 +4335,7 @@ static int __devinit cciss_init_one(struct pci_dev *pdev,
hba[i]->num_luns = 0;
hba[i]->highest_lun = -1;
for (j = 0; j < CISS_MAX_LUN; j++) {
- hba[i]->drv[j].raid_level = -1;
- hba[i]->drv[j].queue = NULL;
+ hba[i]->drv[j] = NULL;
hba[i]->gendisk[j] = NULL;
}
@@ -4348,12 +4390,7 @@ clean1:
cciss_destroy_hba_sysfs_entry(hba[i]);
clean0:
hba[i]->busy_initializing = 0;
- /* cleanup any queues that may have been initialized */
- for (j=0; j <= hba[i]->highest_lun; j++){
- drive_info_struct *drv = &(hba[i]->drv[j]);
- if (drv->queue)
- blk_cleanup_queue(drv->queue);
- }
+
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo
diff --git a/drivers/block/cciss.h b/drivers/block/cciss.h
index 5188f71..31524cf 100644
--- a/drivers/block/cciss.h
+++ b/drivers/block/cciss.h
@@ -45,13 +45,14 @@ typedef struct _drive_info_struct
* to prevent it from being opened or it's
* queue from being started.
*/
- struct device *dev;
+ struct device dev;
__u8 serial_no[16]; /* from inquiry page 0x83,
* not necc. null terminated.
*/
char vendor[VENDOR_LEN + 1]; /* SCSI vendor string */
char model[MODEL_LEN + 1]; /* SCSI model string */
char rev[REV_LEN + 1]; /* SCSI revision string */
+ char device_initialized; /* indicates whether dev is initialized */
} drive_info_struct;
struct ctlr_info
@@ -87,7 +88,7 @@ struct ctlr_info
BYTE cciss_read_capacity;
// information about each logical volume
- drive_info_struct drv[CISS_MAX_LUN];
+ drive_info_struct *drv[CISS_MAX_LUN];
struct access_method access;
--
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