From: Amit Kumar Mahapatra Date: Mon, 17 Jun 2024 15:30:52 +0000 (+0530) Subject: spi: Fix SPI slave probe failure X-Git-Tag: v6.10-rc5~9^2~1 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2c1b7bbe253986619fa5623a13055316e730e746;p=thirdparty%2Flinux.git spi: Fix SPI slave probe failure While adding a SPI device, the SPI core ensures that multiple logical CS doesn't map to the same physical CS. For example, spi->chip_select[0] != spi->chip_select[1] and so forth. However, unlike the SPI master, the SPI slave doesn't have the list of chip selects, this leads to probe failure when the SPI controller is configured as slave. Update the __spi_add_device() function to perform this check only if the SPI controller is configured as master. Fixes: 4d8ff6b0991d ("spi: Add multi-cs memories support in SPI core") Signed-off-by: Amit Kumar Mahapatra Link: https://msgid.link/r/20240617153052.26636-1-amit.kumar-mahapatra@amd.com Signed-off-by: Mark Brown --- diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 9da736d51a2ba..fc13fa1921895 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -689,10 +689,12 @@ static int __spi_add_device(struct spi_device *spi) * Make sure that multiple logical CS doesn't map to the same physical CS. * For example, spi->chip_select[0] != spi->chip_select[1] and so on. */ - for (idx = 0; idx < SPI_CS_CNT_MAX; idx++) { - status = spi_dev_check_cs(dev, spi, idx, spi, idx + 1); - if (status) - return status; + if (!spi_controller_is_target(ctlr)) { + for (idx = 0; idx < SPI_CS_CNT_MAX; idx++) { + status = spi_dev_check_cs(dev, spi, idx, spi, idx + 1); + if (status) + return status; + } } /* Set the bus ID string */