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. This patch replaces the 2 uses of snprintf() found in the sysfs .show() call-backs with the new sysfs_emit() helpers. Whist we're at it, let's replace the sprintf()s as well. For no other reason than consistency. Link: https://lwn.net/Articles/69419/ Link: https://github.com/KSPP/linux/issues/105 Cc: Matthieu CASTET <castet.matthieu@xxxxxxx> Cc: Stanislaw Gruszka <stf_xl@xxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Damien Bergamini <damien.bergamini@xxxxxxx> Cc: linux-usb@xxxxxxxxxxxxxxx Signed-off-by: Lee Jones <lee@xxxxxxxxxx> --- drivers/usb/atm/ueagle-atm.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c index 5812f7ea7f902..8d5580d8d20a8 100644 --- a/drivers/usb/atm/ueagle-atm.c +++ b/drivers/usb/atm/ueagle-atm.c @@ -2252,7 +2252,7 @@ static ssize_t stat_status_show(struct device *dev, struct device_attribute *att sc = dev_to_uea(dev); if (!sc) goto out; - ret = snprintf(buf, 10, "%08x\n", sc->stats.phy.state); + ret = sysfs_emit(buf, "%08x\n", sc->stats.phy.state); out: mutex_unlock(&uea_mutex); return ret; @@ -2318,19 +2318,19 @@ static ssize_t stat_human_status_show(struct device *dev, switch (modem_state) { case 0: - ret = sprintf(buf, "Modem is booting\n"); + ret = sysfs_emit(buf, "Modem is booting\n"); break; case 1: - ret = sprintf(buf, "Modem is initializing\n"); + ret = sysfs_emit(buf, "Modem is initializing\n"); break; case 2: - ret = sprintf(buf, "Modem is operational\n"); + ret = sysfs_emit(buf, "Modem is operational\n"); break; case 3: - ret = sprintf(buf, "Modem synchronization failed\n"); + ret = sysfs_emit(buf, "Modem synchronization failed\n"); break; default: - ret = sprintf(buf, "Modem state is unknown\n"); + ret = sysfs_emit(buf, "Modem state is unknown\n"); break; } out: @@ -2364,7 +2364,7 @@ static ssize_t stat_delin_show(struct device *dev, struct device_attribute *attr delin = "LOSS"; } - ret = sprintf(buf, "%s\n", delin); + ret = sysfs_emit(buf, "%s\n", delin); out: mutex_unlock(&uea_mutex); return ret; @@ -2384,7 +2384,7 @@ static ssize_t stat_##name##_show(struct device *dev, \ sc = dev_to_uea(dev); \ if (!sc) \ goto out; \ - ret = snprintf(buf, 10, "%08x\n", sc->stats.phy.name); \ + ret = sysfs_emit(buf, "%08x\n", sc->stats.phy.name); \ if (reset) \ sc->stats.phy.name = 0; \ out: \ -- 2.43.0.rc1.413.gea7ed67945-goog
