[PATCH 5.10 52/57] habanalabs: fix backward compatibility of idle check

[Greg Kroah-Hartman]

From: Oded Gabbay <ogabbay@xxxxxxxxxx>

[ Upstream commit f8abaf379bfe19600f96ae79a6759eb37039ae05 ]

Need to take the lower 32 bits of the driver's 64-bit idle mask and put
it in the legacy 32-bit variable that the userspace reads to know the
idle mask.

Signed-off-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/misc/habanalabs/common/habanalabs_ioctl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/habanalabs/common/habanalabs_ioctl.c b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
index 07317ea491295..35401148969f5 100644
--- a/drivers/misc/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/misc/habanalabs/common/habanalabs_ioctl.c
@@ -133,6 +133,8 @@ static int hw_idle(struct hl_device *hdev, struct hl_info_args *args)
 
 	hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev,
 					&hw_idle.busy_engines_mask_ext, NULL);
+	hw_idle.busy_engines_mask =
+			lower_32_bits(hw_idle.busy_engines_mask_ext);
 
 	return copy_to_user(out, &hw_idle,
 		min((size_t) max_size, sizeof(hw_idle))) ? -EFAULT : 0;
-- 
2.27.0