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spi: fix misleading controller deregistration kernel-doc

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The controller reference count is not decremented on deregistration if
the controller has been allocated using devm_spi_alloc_host/target().

Amend the kernel-doc for devm_spi_register_controller() and
spi_unregister_controller() so that it reflects this (more recent)
behaviour.

Fixes: 5e844cc37a ("spi: Introduce device-managed SPI controller allocation")
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260312151817.32100-6-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Johan Hovold 2026-03-12 16:18:17 +01:00 committed by Mark Brown
parent edc463d72d
commit 3f174274d2
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1 changed files with 4 additions and 2 deletions
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6
drivers/spi/spi.c
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@ -3523,7 +3523,8 @@ static void devm_spi_unregister_controller(void *ctlr)
* Context: can sleep
*
* Register a SPI device as with spi_register_controller() which will
* automatically be unregistered and freed.
* automatically be unregistered (and freed unless it has been allocated using
* devm_spi_alloc_host/target()).
*
* Return: zero on success, else a negative error code.
*/
@ -3557,7 +3558,8 @@ static int __unregister(struct device *dev, void *null)
*
* This must be called from context that can sleep.
*
* Note that this function also drops a reference to the controller.
* Note that this function also drops a reference to the controller unless it
* has been allocated using devm_spi_alloc_host/target().
*/
void spi_unregister_controller(struct spi_controller *ctlr)
{