spi: spi-qpic-snand: unregister ECC engine on probe error and device remove

The on-host hardware ECC engine remains registered both when
the spi_register_controller() function returns with an error
and also on device removal.

Change the qcom_spi_probe() function to unregister the engine
on the error path, and add the missing unregistering call to
qcom_spi_remove() to avoid possible use-after-free issues.

Fixes: 7304d1909080 ("spi: spi-qpic: add driver for QCOM SPI NAND flash Interface")
Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Message-ID: <20250903-qpic-snand-unregister-ecceng-v1-1-ef5387b0abdc@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-qpic-snand.c b/drivers/spi/spi-qpic-snand.c
index 0ceaad7dba3cb5ae68eb428f27d4ebbb2a26cdf2..780abb967822a5ac59b799cf5b942a935ea6deee 100644 (file)
--- a/drivers/spi/spi-qpic-snand.c
+++ b/drivers/spi/spi-qpic-snand.c
@@ -1615,11 +1615,13 @@ static int qcom_spi_probe(struct platform_device *pdev)
        ret = spi_register_controller(ctlr);
        if (ret) {
                dev_err(&pdev->dev, "spi_register_controller failed.\n");
-               goto err_spi_init;
+               goto err_register_controller;
        }
 
        return 0;
 
+err_register_controller:
+       nand_ecc_unregister_on_host_hw_engine(&snandc->qspi->ecc_eng);
 err_spi_init:
        qcom_nandc_unalloc(snandc);
 err_snand_alloc:
@@ -1641,7 +1643,7 @@ static void qcom_spi_remove(struct platform_device *pdev)
        struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
        spi_unregister_controller(ctlr);
-
+       nand_ecc_unregister_on_host_hw_engine(&snandc->qspi->ecc_eng);
        qcom_nandc_unalloc(snandc);
 
        clk_disable_unprepare(snandc->aon_clk);