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| author | Lee Jones <lee@kernel.org> | 2024-01-11 13:17:22 +0000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2024-01-29 20:34:52 -0500 |
| commit | a977c8158a42146dcb0f25c5ce8e1122d781b845 (patch) | |
| tree | f83e78ae1e8edba4021f06a6947e912b26af4bfe | |
| parent | a34fc8c7361c4abb7474a77ce907065db371657f (diff) | |
| download | lwn-a977c8158a42146dcb0f25c5ce8e1122d781b845.tar.gz lwn-a977c8158a42146dcb0f25c5ce8e1122d781b845.zip | |
scsi: 3w-9xxx: Remove snprintf() from sysfs call-backs and replace with sysfs_emit()
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>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20240111131732.1815560-2-lee@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/3w-9xxx.c | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c index f925f8664c2c..6fb61c88ea11 100644 --- a/drivers/scsi/3w-9xxx.c +++ b/drivers/scsi/3w-9xxx.c @@ -161,28 +161,28 @@ static ssize_t twa_show_stats(struct device *dev, ssize_t len; spin_lock_irqsave(tw_dev->host->host_lock, flags); - len = snprintf(buf, PAGE_SIZE, "3w-9xxx 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-9xxx 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 twa_show_stats() */ |