From 7eaa48e9e497ecdddfbcd9323520908d6239a498 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 11 Jan 2024 13:17:23 +0000 Subject: [PATCH] scsi: 3w-sas: 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 Signed-off-by: Lee Jones Link: https://lore.kernel.org/r/20240111131732.1815560-3-lee@kernel.org Signed-off-by: Martin K. Petersen --- drivers/scsi/3w-sas.c | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c index 9bdb75dfdcd7..caa6713a62a4 100644 --- a/drivers/scsi/3w-sas.c +++ b/drivers/scsi/3w-sas.c @@ -166,24 +166,24 @@ static ssize_t twl_show_stats(struct device *dev, ssize_t len; spin_lock_irqsave(tw_dev->host->host_lock, flags); - len = snprintf(buf, PAGE_SIZE, "3w-sas Driver version: %s\n" - "Current commands posted: %4d\n" - "Max commands posted: %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->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-sas Driver version: %s\n" + "Current commands posted: %4d\n" + "Max commands posted: %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->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 twl_show_stats() */