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* [PATCH] drm/nouveau/nvkm: Replace -ENOSYS with -ENODEV
@ 2021-09-08 19:08 Guenter Roeck
  0 siblings, 0 replies; only message in thread
From: Guenter Roeck @ 2021-09-08 19:08 UTC (permalink / raw)
  To: Ben Skeggs
  Cc: David Airlie, Daniel Vetter, dri-devel, nouveau, linux-kernel,
	Guenter Roeck

nvkm test builds fail with the following error.

	In function 'nvkm_control_mthd_pstate_info':
drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c:60:35: error:
	overflow in conversion from 'int' to '__s8' {aka 'signed char'}
		changes value from '-251' to '5'

The code builds on most architectures, but fails on parisc where ENOSYS
is defined as 251. Replace the error code with -ENODEV (-19). The actual
error code does not really matter and is not passed to userspace - it
just has to be negative.

Fixes: 7238eca4cf18 ("drm/nouveau: expose pstate selection per-power source in sysfs")
Signed-off-by: Guenter Roeck <>
 drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c
index b0ece71aefde..ce774579c89d 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/ctrl.c
@@ -57,7 +57,7 @@ nvkm_control_mthd_pstate_info(struct nvkm_control *ctrl, void *data, u32 size)
 		args->v0.count = 0;
-		args->v0.pwrsrc = -ENOSYS;
+		args->v0.pwrsrc = -ENODEV;

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2021-09-08 19:08 [PATCH] drm/nouveau/nvkm: Replace -ENOSYS with -ENODEV Guenter Roeck

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