Re: [PATCH 5/8] iio: accel: kx022a: Switch to sparse friendly iio_device_claim/release_direct()

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On 17/02/2025 16:01, Jonathan Cameron wrote:
From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

These new functions allow sparse to find failures to release
direct mode reducing chances of bugs over the claim_direct_mode()
functions that are deprecated.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Cc: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
---
  drivers/iio/accel/kionix-kx022a.c | 14 ++++++--------
  1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/accel/kionix-kx022a.c b/drivers/iio/accel/kionix-kx022a.c
index 727e007c5fc1..07dcf5f0599f 100644
--- a/drivers/iio/accel/kionix-kx022a.c
+++ b/drivers/iio/accel/kionix-kx022a.c
@@ -577,13 +577,12 @@ static int kx022a_write_raw(struct iio_dev *idev,
  	 * issues if users trust the watermark to be reached within known
  	 * time-limit).
  	 */
-	ret = iio_device_claim_direct_mode(idev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(idev))
+		return -EBUSY;

Not really in the scope of this review - but in my opinion the logic of this check is terribly counter intuitive. I mean,

> +	if (iio_device_claim_direct(idev))
> +		return -EBUSY;

would feel much more familiar. I actually had to look up the implementation of the iio_device_claim_direct() to see this was not a bug.

Other than that this looks very good to me.

Yours,
	-- Matti




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