[PATCH] I2O: first code cleanup of spare warnings and unused functions
Changes:
- Removed unnecessary checking of NULL before calling kfree()
- Make some functions static
- Changed pr_debug() into osm_debug()
- Use i2o_msg_in_to_virt() for getting a pointer to the message frame
- Cleaned up some comments
- Changed some le32_to_cpu() into readl() where necessary
- Make error messages of OSM's look the same
- Cleaned up error handling in i2o_block_end_request()
- Removed unused error handling of failed messages in Block-OSM, which
are not allowed by the I2O spec
- Corrected the blocksize detection in i2o_block
- Added hrt and lct sysfs-attribute to controller
- Call done() function in SCSI-OSM after freeing DMA buffers
- Removed unneeded variable for message size calculation in
i2o_scsi_queuecommand()
- Make some changes to remove sparse warnings
- Reordered some functions
- Cleaned up controller initialization
- Replaced some magic numbers by defines
- Removed unnecessary dma_sync_single_for_cpu() call on coherent DMA
- Removed some unused fields in i2o_controller and removed some unused
functions
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index 4830b77..e69421e 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -104,7 +104,8 @@
struct i2o_device *i2o_dev = to_i2o_device(dev);
struct i2o_block_device *i2o_blk_dev = dev_get_drvdata(dev);
- osm_info("Device removed %s\n", i2o_blk_dev->gd->disk_name);
+ osm_info("device removed (TID: %03x): %s\n", i2o_dev->lct_data.tid,
+ i2o_blk_dev->gd->disk_name);
i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0);
@@ -400,6 +401,49 @@
};
/**
+ * i2o_block_end_request - Post-processing of completed commands
+ * @req: request which should be completed
+ * @uptodate: 1 for success, 0 for I/O error, < 0 for specific error
+ * @nr_bytes: number of bytes to complete
+ *
+ * Mark the request as complete. The lock must not be held when entering.
+ *
+ */
+static void i2o_block_end_request(struct request *req, int uptodate,
+ int nr_bytes)
+{
+ struct i2o_block_request *ireq = req->special;
+ struct i2o_block_device *dev = ireq->i2o_blk_dev;
+ request_queue_t *q = dev->gd->queue;
+ unsigned long flags;
+
+ if (end_that_request_chunk(req, uptodate, nr_bytes)) {
+ int leftover = (req->hard_nr_sectors << 9);
+
+ if (blk_pc_request(req))
+ leftover = req->data_len;
+
+ if (end_io_error(uptodate))
+ end_that_request_chunk(req, 0, leftover);
+ }
+
+ add_disk_randomness(req->rq_disk);
+
+ spin_lock_irqsave(q->queue_lock, flags);
+
+ end_that_request_last(req);
+ dev->open_queue_depth--;
+ list_del(&ireq->queue);
+
+ blk_start_queue(q);
+
+ spin_unlock_irqrestore(q->queue_lock, flags);
+
+ i2o_block_sglist_free(ireq);
+ i2o_block_request_free(ireq);
+};
+
+/**
* i2o_block_reply - Block OSM reply handler.
* @c: I2O controller from which the message arrives
* @m: message id of reply
@@ -411,60 +455,8 @@
static int i2o_block_reply(struct i2o_controller *c, u32 m,
struct i2o_message *msg)
{
- struct i2o_block_request *ireq;
struct request *req;
- struct i2o_block_device *dev;
- struct request_queue *q;
- u8 st;
- unsigned long flags;
-
- /* FAILed message */
- if (unlikely(le32_to_cpu(msg->u.head[0]) & (1 << 13))) {
- struct i2o_message *pmsg;
- u32 pm;
-
- /*
- * FAILed message from controller
- * We increment the error count and abort it
- *
- * In theory this will never happen. The I2O block class
- * specification states that block devices never return
- * FAILs but instead use the REQ status field...but
- * better be on the safe side since no one really follows
- * the spec to the book :)
- */
- pm = le32_to_cpu(msg->body[3]);
- pmsg = i2o_msg_in_to_virt(c, pm);
-
- req = i2o_cntxt_list_get(c, le32_to_cpu(pmsg->u.s.tcntxt));
- if (unlikely(!req)) {
- osm_err("NULL reply received!\n");
- return -1;
- }
-
- ireq = req->special;
- dev = ireq->i2o_blk_dev;
- q = dev->gd->queue;
-
- req->errors++;
-
- spin_lock_irqsave(q->queue_lock, flags);
-
- while (end_that_request_chunk(req, !req->errors,
- le32_to_cpu(pmsg->body[1]))) ;
- end_that_request_last(req);
-
- dev->open_queue_depth--;
- list_del(&ireq->queue);
- blk_start_queue(q);
-
- spin_unlock_irqrestore(q->queue_lock, flags);
-
- /* Now flush the message by making it a NOP */
- i2o_msg_nop(c, pm);
-
- return -1;
- }
+ int uptodate = 1;
req = i2o_cntxt_list_get(c, le32_to_cpu(msg->u.s.tcntxt));
if (unlikely(!req)) {
@@ -472,61 +464,13 @@
return -1;
}
- ireq = req->special;
- dev = ireq->i2o_blk_dev;
- q = dev->gd->queue;
-
- if (unlikely(!dev->i2o_dev)) {
- /*
- * This is HACK, but Intel Integrated RAID allows user
- * to delete a volume that is claimed, locked, and in use
- * by the OS. We have to check for a reply from a
- * non-existent device and flag it as an error or the system
- * goes kaput...
- */
- req->errors++;
- osm_warn("Data transfer to deleted device!\n");
- spin_lock_irqsave(q->queue_lock, flags);
- while (end_that_request_chunk
- (req, !req->errors, le32_to_cpu(msg->body[1]))) ;
- end_that_request_last(req);
-
- dev->open_queue_depth--;
- list_del(&ireq->queue);
- blk_start_queue(q);
-
- spin_unlock_irqrestore(q->queue_lock, flags);
- return -1;
- }
-
/*
* Lets see what is cooking. We stuffed the
* request in the context.
*/
- st = le32_to_cpu(msg->body[0]) >> 24;
-
- if (st != 0) {
- int err;
- char *bsa_errors[] = {
- "Success",
- "Media Error",
- "Failure communicating to device",
- "Device Failure",
- "Device is not ready",
- "Media not present",
- "Media is locked by another user",
- "Media has failed",
- "Failure communicating to device",
- "Device bus failure",
- "Device is locked by another user",
- "Device is write protected",
- "Device has reset",
- "Volume has changed, waiting for acknowledgement"
- };
-
- err = le32_to_cpu(msg->body[0]) & 0xffff;
-
+ if ((le32_to_cpu(msg->body[0]) >> 24) != 0) {
+ u32 status = le32_to_cpu(msg->body[0]);
/*
* Device not ready means two things. One is that the
* the thing went offline (but not a removal media)
@@ -539,40 +483,23 @@
* Don't stick a supertrak100 into cache aggressive modes
*/
- osm_err("block-osm: /dev/%s error: %s", dev->gd->disk_name,
- bsa_errors[le32_to_cpu(msg->body[0]) & 0xffff]);
- if (le32_to_cpu(msg->body[0]) & 0x00ff0000)
- printk(KERN_ERR " - DDM attempted %d retries",
- (le32_to_cpu(msg->body[0]) >> 16) & 0x00ff);
- printk(KERN_ERR ".\n");
+ osm_err("%03x error status: %02x, detailed status: %04x\n",
+ (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff),
+ status >> 24, status & 0xffff);
+
req->errors++;
- } else
- req->errors = 0;
- if (!end_that_request_chunk
- (req, !req->errors, le32_to_cpu(msg->body[1]))) {
- add_disk_randomness(req->rq_disk);
- spin_lock_irqsave(q->queue_lock, flags);
+ uptodate = 0;
+ }
- end_that_request_last(req);
-
- dev->open_queue_depth--;
- list_del(&ireq->queue);
- blk_start_queue(q);
-
- spin_unlock_irqrestore(q->queue_lock, flags);
-
- i2o_block_sglist_free(ireq);
- i2o_block_request_free(ireq);
- } else
- osm_err("still remaining chunks\n");
+ i2o_block_end_request(req, uptodate, le32_to_cpu(msg->body[1]));
return 1;
};
static void i2o_block_event(struct i2o_event *evt)
{
- osm_info("block-osm: event received\n");
+ osm_info("event received\n");
kfree(evt);
};
@@ -875,9 +802,7 @@
sg++;
}
- writel(I2O_MESSAGE_SIZE
- (((unsigned long)mptr -
- (unsigned long)&msg->u.head[0]) >> 2) | SGL_OFFSET_8,
+ writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | SGL_OFFSET_8,
&msg->u.head[0]);
list_add_tail(&ireq->queue, &dev->open_queue);
@@ -1048,7 +973,6 @@
int rc;
u64 size;
u32 blocksize;
- u16 power;
u32 flags, status;
int segments;
@@ -1058,8 +982,6 @@
return -ENODEV;
}
- osm_info("New device detected (TID: %03x)\n", i2o_dev->lct_data.tid);
-
if (i2o_device_claim(i2o_dev)) {
osm_warn("Unable to claim device. Installation aborted\n");
rc = -EFAULT;
@@ -1111,15 +1033,21 @@
* Ask for the current media data. If that isn't supported
* then we ask for the device capacity data
*/
- if (i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) != 0
- || i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) != 0) {
- i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4);
- i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8);
- }
- osm_debug("blocksize = %d\n", blocksize);
+ if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8))
+ if (!i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) {
+ osm_warn("could not get size of %s\n", gd->disk_name);
+ size = 0;
+ }
- if (i2o_parm_field_get(i2o_dev, 0x0000, 2, &power, 2))
- power = 0;
+ if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4))
+ if (!i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) {
+ osm_warn("unable to get blocksize of %s\n",
+ gd->disk_name);
+ blocksize = 0;
+ }
+
+ if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &i2o_blk_dev->power, 2))
+ i2o_blk_dev->power = 0;
i2o_parm_field_get(i2o_dev, 0x0000, 5, &flags, 4);
i2o_parm_field_get(i2o_dev, 0x0000, 6, &status, 4);
@@ -1131,6 +1059,9 @@
unit++;
+ osm_info("device added (TID: %03x): %s\n", i2o_dev->lct_data.tid,
+ i2o_blk_dev->gd->disk_name);
+
return 0;
claim_release: