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scsi: 3w-xxxx: Remove snprintf() from sysfs call-backs and replace with sysfs_emit()

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Since snprintf() has the documented, but still rather strange trait of
returning the length of the data that *would have been* written to the
array if space were available, rather than the arguably more useful
length of data *actually* written, it is usually considered wise to use
something else instead in order to avoid confusion.

In the case of sysfs call-backs, new wrappers exist that do just that.

Link: https://lwn.net/Articles/69419/
Link: https://github.com/KSPP/linux/issues/105
Cc: Adam Radford <aradford@gmail.com>
Cc: Joel Jacobson <linux@3ware.com>
Cc: de Melo <acme@conectiva.com.br>
Cc: Andre Hedrick <andre@suse.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20240111131732.1815560-4-lee@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Lee Jones 2024-01-11 13:17:24 +00:00 committed by Martin K. Petersen
parent 7eaa48e9e4
commit 30cc6aa09e
1 changed files with 22 additions and 22 deletions
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44
drivers/scsi/3w-xxxx.c
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@ -496,28 +496,28 @@ static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr,
ssize_t len;
spin_lock_irqsave(tw_dev->host->host_lock, flags);
len = snprintf(buf, PAGE_SIZE, "3w-xxxx Driver version: %s\n"
"Current commands posted: %4d\n"
"Max commands posted: %4d\n"
"Current pending commands: %4d\n"
"Max pending commands: %4d\n"
"Last sgl length: %4d\n"
"Max sgl length: %4d\n"
"Last sector count: %4d\n"
"Max sector count: %4d\n"
"SCSI Host Resets: %4d\n"
"AEN's: %4d\n",
TW_DRIVER_VERSION,
tw_dev->posted_request_count,
tw_dev->max_posted_request_count,
tw_dev->pending_request_count,
tw_dev->max_pending_request_count,
tw_dev->sgl_entries,
tw_dev->max_sgl_entries,
tw_dev->sector_count,
tw_dev->max_sector_count,
tw_dev->num_resets,
tw_dev->aen_count);
len = sysfs_emit(buf, "3w-xxxx Driver version: %s\n"
"Current commands posted: %4d\n"
"Max commands posted: %4d\n"
"Current pending commands: %4d\n"
"Max pending commands: %4d\n"
"Last sgl length: %4d\n"
"Max sgl length: %4d\n"
"Last sector count: %4d\n"
"Max sector count: %4d\n"
"SCSI Host Resets: %4d\n"
"AEN's: %4d\n",
TW_DRIVER_VERSION,
tw_dev->posted_request_count,
tw_dev->max_posted_request_count,
tw_dev->pending_request_count,
tw_dev->max_pending_request_count,
tw_dev->sgl_entries,
tw_dev->max_sgl_entries,
tw_dev->sector_count,
tw_dev->max_sector_count,
tw_dev->num_resets,
tw_dev->aen_count);
spin_unlock_irqrestore(tw_dev->host->host_lock, flags);
return len;
} /* End tw_show_stats() */