[PATCH] drm/nouveau/nvkm: do not use assignment in if condition

[sunran001@208suo.com]

Assignments in if condition are less readable and error-prone.  Fixes
also checkpatch warning:

ERROR: do not use assignment in if condition

Signed-off-by:Ran Sun <sunran001@208suo.com>
---
  drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c 
b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
index 976539de4220..054fa42f1d04 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
@@ -286,7 +286,8 @@ nvkm_i2c_new_(const struct nvkm_i2c_func *func, 
struct nvkm_device *device,

          if (ccbE.share != DCB_I2C_UNUSED) {
              const int id = NVKM_I2C_PAD_HYBRID(ccbE.share);
-            if (!(pad = nvkm_i2c_pad_find(i2c, id)))
+            pad = nvkm_i2c_pad_find(i2c, id);
+            if (!pad)
                  ret = func->pad_s_new(i2c, id, &pad);
              else
                  ret = 0;