[PATCH next] drm/st7571-i2c: Fix IS_ERR() vs NULL checks in probe()

[Dan Carpenter]

The devm_kzalloc() function returns NULL on failure, not error pointers.
Also printing an error message for kmalloc() failures is against kernel
style so just return -ENOMEM without printing a message.  (Kmalloc
already prints a message).

Fixes: 4b35f0f41ee2 ("drm/st7571-i2c: add support for Sitronix ST7571 LCD 
controller")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/gpu/drm/tiny/st7571-i2c.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/tiny/st7571-i2c.c 
b/drivers/gpu/drm/tiny/st7571-i2c.c
index dc410ec41baf..eec846892962 100644
--- a/drivers/gpu/drm/tiny/st7571-i2c.c
+++ b/drivers/gpu/drm/tiny/st7571-i2c.c
@@ -908,16 +908,14 @@ static int st7571_probe(struct i2c_client *client)
        st7571->hwbuf = devm_kzalloc(&client->dev,
                                     (st7571->nlines * st7571->ncols * 
st7571->bpp) / 8,
                                     GFP_KERNEL);
-       if (IS_ERR(st7571->hwbuf))
-               return dev_err_probe(&client->dev, PTR_ERR(st7571->hwbuf),
-                                    "Failed to allocate intermediate 
buffer\n");
+       if (!st7571->hwbuf)
+               return -ENOMEM;
 
        st7571->row = devm_kzalloc(&client->dev,
                                   (st7571->ncols * st7571->bpp),
                                   GFP_KERNEL);
-       if (IS_ERR(st7571->row))
-               return dev_err_probe(&client->dev, PTR_ERR(st7571->row),
-                                    "Failed to allocate row buffer\n");
+       if (!st7571->row)
+               return -ENOMEM;
 
        ret = st7571_mode_config_init(st7571);
        if (ret)
-- 
2.47.2