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SubjectRe: [PATCH] west bridge, block driver fixes
On Tue, 07 Sep 2010 12:37:33 -0700 David Cross wrote:

> This patch makes minor fixes to the block driver for locking issues,
> printk statements and minor change for a kernel update to 2.6.36.
> Please let me know if there are issues or concerns with this patch.
> Thanks,
> David
>
> Signed-off-by: David Cross <david.cross@cypress.com>

Missing "---" line after S-O-B line and before the first diff.

It's a good idea (but not required) to include a diffstat, like so:

> diffstat -p1 -w70 wb-block-drvr.patch
drivers/staging/westbridge/astoria/block/cyasblkdev_block.c | 188 +++++-----
drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c | 12
drivers/staging/westbridge/astoria/block/cyasblkdev_queue.h | 2
3 files changed, 105 insertions(+), 97 deletions(-)


See Documentation/SubmittingPatches for info on both of these.


>
> diff -uprN -X linux-next-vanilla/Documentation/dontdiff linux-next-vanilla/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c linux-next-incl-sdk/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c
> --- linux-next-vanilla/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c 2010-08-31 19:32:51.000000000 -0700
> +++ linux-next-incl-sdk/drivers/staging/westbridge/astoria/block/cyasblkdev_block.c 2010-09-07 11:28:49.000000000 -0700
> @@ -202,7 +202,7 @@ static struct cyasblkdev_blk_data *cyasb
> if (bd) {
> bd->usage++;
> #ifndef NBDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev_blk_get: usage = %d\n", bd->usage) ;

No space before ';'.
Better to use __func__ for the function name, especially when it's long.

What usage is this telling about?
(This is what I thought should have been in userspace, but I was reading
this as telling someone about usage syntax and I now see that it's not
doing that at all.)


> #endif
> }
> @@ -222,12 +222,12 @@ static void cyasblkdev_blk_put(
> if (bd) {
> bd->usage--;
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> " cyasblkdev_blk_put , bd->usage= %d\n", bd->usage);

same question here.

> #endif
> } else {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev: blk_put(bd) on bd = NULL!: usage = %d\n",
> bd->usage);

This appears to be a debugging message, not user info.

> #endif
> @@ -244,7 +244,7 @@ static void cyasblkdev_blk_put(
> if (CY_AS_ERROR_SUCCESS !=
> cy_as_storage_release(bd->dev_handle, 0, 0, 0, 0)) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev: cannot release bus 0\n") ;

Ditto.
And no space before ';'.

> #endif
> }
> @@ -252,7 +252,7 @@ static void cyasblkdev_blk_put(
> if (CY_AS_ERROR_SUCCESS !=
> cy_as_storage_release(bd->dev_handle, 1, 0, 0, 0)) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev: cannot release bus 1\n") ;

Ditto.

> #endif
> }
> @@ -260,7 +260,7 @@ static void cyasblkdev_blk_put(
> if (CY_AS_ERROR_SUCCESS !=
> cy_as_storage_stop(bd->dev_handle, 0, 0)) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev: cannot stop storage stack\n") ;

Ditto.

> #endif
> }
> @@ -278,7 +278,7 @@ static void cyasblkdev_blk_put(
> }
>
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "cyasblkdev (blk_put): usage = %d\n",
> bd->usage) ;
> #endif
> @@ -304,7 +304,7 @@ static int cyasblkdev_blk_open(
> if (bdev->bd_disk == bd->user_disk_0) {
> if ((mode & FMODE_WRITE) && bd->user_disk_0_read_only) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "device marked as readonly "
> "and write requested\n");

More debugging code.

> #endif
> @@ -315,7 +315,7 @@ static int cyasblkdev_blk_open(
> } else if (bdev->bd_disk == bd->user_disk_1) {
> if ((mode & FMODE_WRITE) && bd->user_disk_1_read_only) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "device marked as readonly "
> "and write requested\n");
> #endif
> @@ -326,7 +326,7 @@ static int cyasblkdev_blk_open(
> } else if (bdev->bd_disk == bd->system_disk) {
> if ((mode & FMODE_WRITE) && bd->system_disk_read_only) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "device marked as readonly "
> "and write requested\n");
> #endif
...
> @@ -452,7 +452,7 @@ static int cyasblkdev_blk_prep_rq(
> /* If we have no device, we haven't finished initialising. */
> if (!bd || !bd->dev_handle) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(KERN_ERR
> + printk(KERN_ERR
> "cyasblkdev %s: killing request - no device/host\n",

ditto.

> req->rq_disk->disk_name);
> #endif
> @@ -466,7 +466,7 @@ static int cyasblkdev_blk_prep_rq(
>
> /* Check for excessive requests.*/
> if (blk_rq_pos(req) + blk_rq_sectors(req) > get_capacity(req->rq_disk)) {
> - cy_as_hal_print_message("cyasblkdev: bad request address\n");
> + printk(KERN_INFO "cyasblkdev: bad request address\n");

ditto.

> stat = BLKPREP_KILL;
> }
>
> @@ -496,20 +496,23 @@ static void cyasblkdev_issuecallback(
>
> if (status != CY_AS_ERROR_SUCCESS) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "%s: async r/w: op:%d failed with error %d at address %d\n",
> __func__, op, status, block_number) ;
> #endif
> }
>
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO
> "%s calling blk_end_request from issue_callback "
> "req=0x%x, status=0x%x, nr_sectors=0x%x\n",
> __func__, (unsigned int) gl_bd->queue.req, status,
> (unsigned int) blk_rq_sectors(gl_bd->queue.req)) ;

ditto.

> #endif
>
> + if (rq_data_dir(gl_bd->queue.req) != READ)
> + cy_as_release_common_lock();
> +
> /* note: blk_end_request w/o __ prefix should
> * not require spinlocks on the queue*/
> while (blk_end_request(gl_bd->queue.req,
> @@ -533,7 +536,7 @@ static void cyasblkdev_issuecallback(
> /* queue is not plugged */
> gl_bd->queue.req = blk_fetch_request(gl_bd->queue.queue);
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s blkdev_callback: "
> + printk(KERN_INFO "%s blkdev_callback: "
> "blk_fetch_request():%p\n",

Line above should be indented same as the line below.

> __func__, gl_bd->queue.req);
> #endif
> @@ -543,7 +546,7 @@ static void cyasblkdev_issuecallback(
> spin_unlock_irq(&gl_bd->lock);
>
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s blkdev_callback: about to "
> + printk(KERN_INFO "%s blkdev_callback: about to "
> "call issue_fn:%p\n", __func__, gl_bd->queue.req);

Indent line above more.

> #endif
>
...
> @@ -651,13 +654,14 @@ static int cyasblkdev_blk_issue_rq(
> bq->req = NULL ;
> }
> } else {
> + cy_as_acquire_common_lock();
> ret = cy_as_storage_write_async(bd->dev_handle, bus_num, 0,
> lcl_unit_no, req_sector, bd->sg, req_nr_sectors,
> (cy_as_storage_callback)cyasblkdev_issuecallback);
>
> if (ret != CY_AS_ERROR_SUCCESS) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s: write failed with "
> + printk(KERN_INFO "%s: write failed with "

indentation

> "error %d at address %ld, unit no %d\n",
> __func__, ret, blk_rq_pos(req), lcl_unit_no);
> #endif
> @@ -690,7 +694,7 @@ static void cyasblkdev_storage_callback(
> )
> {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s: bus:%d, device:%d, evtype:%d, "
> + printk(KERN_INFO "%s: bus:%d, device:%d, evtype:%d, "

indentation

> "evdata:%p\n ", __func__, bus, device, evtype, evdata);
> #endif
>
...
> @@ -821,7 +825,7 @@ static int cyasblkdev_add_disks(int bus_
> cy_as_storage_query_unit_data unit_data = {0} ;
>
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s:query device: "
> + printk(KERN_INFO "%s:query device: "

indentation

> "type:%d, removable:%d, writable:%d, "
> "blksize %d, units:%d, locked:%d, "
> "erase_sz:%d\n",
> @@ -876,7 +880,7 @@ static int cyasblkdev_add_disks(int bus_
> if ((ret != CY_AS_ERROR_SUCCESS) &&
> (ret != CY_AS_ERROR_ALREADY_PARTITIONED)) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message("%s: cy_as_storage_"
> + printk(KERN_INFO "%s: cy_as_storage_"

indentation.
But it shouldn't be here at all, unless it's in a debugging form.
(i.e., not like this)

> "create_p_partition after size > 0 check "
> "failed with error code %d\n",
> __func__, ret);
> @@ -888,7 +892,7 @@ static int cyasblkdev_add_disks(int bus_
>
> } else if (ret == CY_AS_ERROR_ALREADY_PARTITIONED) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

indentation

> "%s: cy_as_storage_create_p_partition "
> "indicates memory already partitioned\n",
> __func__);
> @@ -911,7 +915,7 @@ static int cyasblkdev_add_disks(int bus_
> unit_data.unit = 1 ;
> } else {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

indentation

> "%s: cy_as_storage_create_p_partition "
> "after removal unexpectedly failed "
> "with error %d\n", __func__, ret) ;
> @@ -932,7 +936,7 @@ static int cyasblkdev_add_disks(int bus_
> &unit_data, 0, 0) ;
> if (ret != CY_AS_ERROR_SUCCESS) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: cannot query %d "
> "device unit - reason code %d\n",
> __func__, bus_num, ret) ;
> @@ -946,7 +950,7 @@ static int cyasblkdev_add_disks(int bus_
> }
> } else {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: cy_as_storage_remove_p_partition "
> "failed with error %d\n",
> __func__, ret);
> @@ -960,7 +964,7 @@ static int cyasblkdev_add_disks(int bus_
> bd->dev_handle, &unit_data, 0, 0) ;
> if (ret != CY_AS_ERROR_SUCCESS) {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: cannot query %d "
> "device unit - reason "
> "code %d\n", __func__,
> @@ -1006,7 +1010,7 @@ static int cyasblkdev_add_disks(int bus_
> }
> } else {
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: cy_as_storage_create_p_partition "
> "created successfully\n", __func__);
> #endif
> @@ -1020,7 +1024,7 @@ static int cyasblkdev_add_disks(int bus_
> }
> #ifndef WESTBRIDGE_NDEBUG
> else {
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: invalid partition_size%d\n", __func__,
> private_partition_size);
>
...
> @@ -1224,7 +1229,7 @@ static int cyasblkdev_add_disks(int bus_
> blk_queue_logical_block_size(bd->queue.queue,
> bd->user_disk_0_blk_size);
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

indentation

> "%s: set hard sect_sz:%d\n",
> __func__,
> bd->user_disk_0_blk_size);
> @@ -1233,7 +1238,7 @@ static int cyasblkdev_add_disks(int bus_
> blk_queue_logical_block_size(bd->queue.queue,
> bd->user_disk_1_blk_size);
> #ifndef WESTBRIDGE_NDEBUG
> - cy_as_hal_print_message(
> + printk(KERN_INFO

same

> "%s: set hard sect_sz:%d\n",
> __func__,
> bd->user_disk_1_blk_size);
...
> diff -uprN -X linux-next-vanilla/Documentation/dontdiff linux-next-vanilla/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c linux-next-incl-sdk/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c
> --- linux-next-vanilla/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c 2010-09-01 15:56:46.000000000 -0700
> +++ linux-next-incl-sdk/drivers/staging/westbridge/astoria/block/cyasblkdev_queue.c 2010-09-07 11:51:23.000000000 -0700
...
> @@ -192,7 +192,7 @@ static int cyasblkdev_queue_thread(void
> "thread_sem->count=%d\n",
> __func__, bq->thread_sem.count);
> if (spin_is_locked(q->queue_lock)) {
> - cy_as_hal_print_message("%s: queue_lock "
> + printk(KERN_INFO "%s: queue_lock "

indentation

> "is locked, need to release\n", __func__);
> spin_unlock(q->queue_lock);
>


---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***


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