linux-kernel - [PATCH v3 next 1/6] iio: sca3000: cache SPI device ID in probe

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Message-ID: <20260203122109.689669-2-harshit.m.mogalapalli@oracle.com>
Date: Tue,  3 Feb 2026 04:20:45 -0800
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Andy Shevchenko <andy@...nel.org>,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        Antoniu Miclaus <antoniu.miclaus@...log.com>,
        Andrew Ijano <andrew.ijano@...il.com>, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: kernel-janitors@...r.kernel.org, error27@...il.com,
        andriy.shevchenko@...el.com
Subject: [PATCH v3 next 1/6] iio: sca3000: cache SPI device ID in probe

Store the spi_device_id at probe entry and reuse it for the name and
chip info instead of calling spi_get_device_id() repeatedly.

While at it, reshuffle variable list in a reverse Christmas tree
order. No functional change intended.

Suggested-by: Andy Shevchenko <andriy.shevchenko@...el.com>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
v2->v3: Split cachine spi device id patch from the  dev cleanup.
---
 drivers/iio/accel/sca3000.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
index 9ef4d6e27466..a0b431aff024 100644
--- a/drivers/iio/accel/sca3000.c
+++ b/drivers/iio/accel/sca3000.c
@@ -1439,9 +1439,10 @@ static const struct iio_info sca3000_info = {
 
 static int sca3000_probe(struct spi_device *spi)
 {
-	int ret;
+	const struct spi_device_id *id = spi_get_device_id(spi);
 	struct sca3000_state *st;
 	struct iio_dev *indio_dev;
+	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 	if (!indio_dev)
@@ -1451,10 +1452,9 @@ static int sca3000_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 	st->us = spi;
 	mutex_init(&st->lock);
-	st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)
-					      ->driver_data];
+	st->info = &sca3000_spi_chip_info_tbl[id->driver_data];
 
-	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->name = id->name;
 	indio_dev->info = &sca3000_info;
 	if (st->info->temp_output) {
 		indio_dev->channels = sca3000_channels_with_temp;
-- 
2.47.3