[PATCH 3/9] drm/nouveau: Use EAGAIN instead EBUSY for aux retry.

[Rodrigo Vivi]

Current EBUSY meaning is immediately retry, but this is
about to change. DRM aux transfer is about to change and
make EAGAIN the immediately retry and use EBUSY to wait
a bit for aux channels to recover for any error or wake up.

This has no functional change if the EAGAIN support is in
place already for drm aux transfer.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c   | 4 ++--
 drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c
index 954f5b7..a6cd729 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxg94.c
@@ -52,7 +52,7 @@ g94_i2c_aux_init(struct g94_i2c_aux *aux)
 		udelay(1);
 		if (!timeout--) {
 			AUX_ERR(&aux->base, "begin idle timeout %08x", ctrl);
-			return -EBUSY;
+			return -EAGAIN;
 		}
 	} while (ctrl & 0x03010000);
 
@@ -65,7 +65,7 @@ g94_i2c_aux_init(struct g94_i2c_aux *aux)
 		if (!timeout--) {
 			AUX_ERR(&aux->base, "magic wait %08x", ctrl);
 			g94_i2c_aux_fini(aux);
-			return -EBUSY;
+			return -EAGAIN;
 		}
 	} while ((ctrl & 0x03000000) != urep);
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c
index bed231b..6814e5b 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/auxgm204.c
@@ -52,7 +52,7 @@ gm204_i2c_aux_init(struct gm204_i2c_aux *aux)
 		udelay(1);
 		if (!timeout--) {
 			AUX_ERR(&aux->base, "begin idle timeout %08x", ctrl);
-			return -EBUSY;
+			return -EAGAIN;
 		}
 	} while (ctrl & 0x03010000);
 
@@ -65,7 +65,7 @@ gm204_i2c_aux_init(struct gm204_i2c_aux *aux)
 		if (!timeout--) {
 			AUX_ERR(&aux->base, "magic wait %08x", ctrl);
 			gm204_i2c_aux_fini(aux);
-			return -EBUSY;
+			return -EAGAIN;
 		}
 	} while ((ctrl & 0x03000000) != urep);
 
-- 
2.4.3