Use a helper for seting driver_override to reduce amount of duplicated code.
Signed-off-by: Krzysztof Kozlowski krzysztof.kozlowski@canonical.com --- drivers/spi/spi.c | 26 ++++---------------------- include/linux/spi/spi.h | 2 ++ 2 files changed, 6 insertions(+), 22 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 4599b121d744..9d0b11017741 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -72,29 +72,11 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct spi_device *spi = to_spi_device(dev); - const char *end = memchr(buf, '\n', count); - const size_t len = end ? end - buf : count; - const char *driver_override, *old; - - /* We need to keep extra room for a newline when displaying value */ - if (len >= (PAGE_SIZE - 1)) - return -EINVAL; - - driver_override = kstrndup(buf, len, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; + int ret;
- device_lock(dev); - old = spi->driver_override; - if (len) { - spi->driver_override = driver_override; - } else { - /* Empty string, disable driver override */ - spi->driver_override = NULL; - kfree(driver_override); - } - device_unlock(dev); - kfree(old); + ret = driver_set_override(dev, &spi->driver_override, buf, count); + if (ret) + return ret;
return count; } diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 7ab3fed7b804..f99bbb20dd4b 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -136,6 +136,8 @@ extern int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer); * for driver coldplugging, and in uevents used for hotplugging * @driver_override: If the name of a driver is written to this attribute, then * the device will bind to the named driver and only the named driver. + * Do not set directly, because core frees it; use driver_set_override() to + * set or clear it. * @cs_gpio: LEGACY: gpio number of the chipselect line (optional, -ENOENT when * not using a GPIO line) use cs_gpiod in new drivers by opting in on * the spi_master.