As per the kernel's documentation, sysfs_emit() is the preferred way to format strings for sysfs attributes. It handles buffer overruns safely. Replace sprintf calls with sysfs_emit across all loopback sysfs show macros.
Signed-off-by: Luis Soza Rodriguez contact@sluisr.com --- v2: align backslashes in macros as requested by Dan Carpenter.
drivers/staging/greybus/loopback.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/greybus/loopback.c b/drivers/staging/greybus/loopback.c index aa9c73cb0..3a502d89d 100644 --- a/drivers/staging/greybus/loopback.c +++ b/drivers/staging/greybus/loopback.c @@ -125,7 +125,7 @@ static ssize_t field##_show(struct device *dev, \ char *buf) \ { \ struct gb_loopback *gb = dev_get_drvdata(dev); \ - return sprintf(buf, "%u\n", gb->field); \ + return sysfs_emit(buf, "%u\n", gb->field); \ } \ static DEVICE_ATTR_RO(field)
@@ -137,8 +137,8 @@ static ssize_t name##_##field##_show(struct device *dev, \ struct gb_loopback *gb = dev_get_drvdata(dev); \ /* Report 0 for min and max if no transfer succeeded */ \ if (!gb->requests_completed) \ - return sprintf(buf, "0\n"); \ - return sprintf(buf, "%" #type "\n", gb->name.field); \ + return sysfs_emit(buf, "0\n"); \ + return sysfs_emit(buf, "%" #type "\n", gb->name.field); \ } \ static DEVICE_ATTR_RO(name##_##field)
@@ -158,7 +158,7 @@ static ssize_t name##_avg_show(struct device *dev, \ rem = do_div(avg, count); \ rem *= 1000000; \ do_div(rem, count); \ - return sprintf(buf, "%llu.%06u\n", avg, (u32)rem); \ + return sysfs_emit(buf, "%llu.%06u\n", avg, (u32)rem); \ } \ static DEVICE_ATTR_RO(name##_avg)
@@ -173,7 +173,7 @@ static ssize_t field##_show(struct device *dev, \ char *buf) \ { \ struct gb_loopback *gb = dev_get_drvdata(dev); \ - return sprintf(buf, "%" #type "\n", gb->field); \ + return sysfs_emit(buf, "%" #type "\n", gb->field); \ } \ static ssize_t field##_store(struct device *dev, \ struct device_attribute *attr, \ @@ -199,7 +199,7 @@ static ssize_t field##_show(struct device *dev, \ char *buf) \ { \ struct gb_loopback *gb = dev_get_drvdata(dev); \ - return sprintf(buf, "%u\n", gb->field); \ + return sysfs_emit(buf, "%u\n", gb->field); \ } \ static DEVICE_ATTR_RO(field)
@@ -209,7 +209,7 @@ static ssize_t field##_show(struct device *dev, \ char *buf) \ { \ struct gb_loopback *gb = dev_get_drvdata(dev); \ - return sprintf(buf, "%" #type "\n", gb->field); \ + return sysfs_emit(buf, "%" #type "\n", gb->field); \ } \ static ssize_t field##_store(struct device *dev, \ struct device_attribute *attr, \