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spi: Move comment about chipselect check to the right place

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The part of the comment about locking isn't that relevant compared to
the chip select check. So drop the sentence about locking.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20211007121415.2401638-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Uwe Kleine-König 2021-10-07 14:14:12 +02:00 committed by Mark Brown
parent 9e1ff307c7
commit 6bfb15f34d
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GPG Key ID: 24D68B725D5487D0
1 changed files with 5 additions and 4 deletions
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9
drivers/spi/spi.c
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@ -564,6 +564,11 @@ static int __spi_add_device(struct spi_device *spi)
struct device *dev = ctlr->dev.parent;
int status;
/*
* We need to make sure there's no other device with this
* chipselect **BEFORE** we call setup(), else we'll trash
* its configuration.
*/
status = bus_for_each_dev(&spi_bus_type, NULL, spi, spi_dev_check);
if (status) {
dev_err(dev, "chipselect %d already in use\n",
@ -632,10 +637,6 @@ int spi_add_device(struct spi_device *spi)
/* Set the bus ID string */
spi_dev_set_name(spi);
/* We need to make sure there's no other device with this
* chipselect **BEFORE** we call setup(), else we'll trash
* its configuration. Lock against concurrent add() calls.
*/
mutex_lock(&spi_add_lock);
status = __spi_add_device(spi);
mutex_unlock(&spi_add_lock);