spi: rspi: Use devm_kasprintf()

Use the devm_kasprintf() helper function instead of open coding
error-prone buffer handling and string formatting.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index a4d8d3cf2912..aa1c6a893570 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -1046,12 +1046,11 @@ static int rspi_request_irq(struct device *dev, unsigned int irq,
                             irq_handler_t handler, const char *suffix,
                             void *dev_id)
 {
-        const char *base = dev_name(dev);
-        size_t len = strlen(base) + strlen(suffix) + 2;
-        char *name = devm_kzalloc(dev, len, GFP_KERNEL);
+        const char *name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s",
+                                          dev_name(dev), suffix);
         if (!name)
                 return -ENOMEM;
-        snprintf(name, len, "%s:%s", base, suffix);
+
         return devm_request_irq(dev, irq, handler, 0, name, dev_id);
 }