@@ -350,7 +350,7 @@ static int mt7621_spi_probe(struct platform_device *pdev)
if (status)
return status;
- master = spi_alloc_master(&pdev->dev, sizeof(*rs));
+ master = devm_spi_alloc_master(&pdev->dev, sizeof(*rs));
if (!master) {
dev_info(&pdev->dev, "master allocation failed\n");
clk_disable_unprepare(clk);
@@ -382,7 +382,7 @@ static int mt7621_spi_probe(struct platform_device *pdev)
return ret;
}
- ret = devm_spi_register_controller(&pdev->dev, master);
+ ret = spi_register_controller(master);
if (ret)
clk_disable_unprepare(clk);
@@ -397,6 +397,7 @@ static int mt7621_spi_remove(struct platform_device *pdev)
master = dev_get_drvdata(&pdev->dev);
rs = spi_controller_get_devdata(master);
+ spi_unregister_controller(master);
clk_disable_unprepare(rs->clk);
return 0;
If the calls to device_reset() or devm_spi_register_controller() fail on probe of the MediaTek MT7621 SPI driver, the spi_controller struct is erroneously not freed. Fix by switching over to the new devm_spi_alloc_master() helper. Additionally, there's an ordering issue in mt7621_spi_remove() wherein the spi_controller is unregistered after disabling the SYS clock. The correct order is to call spi_unregister_controller() *before* this teardown step because bus accesses may still be ongoing until that function returns. All of these bugs have existed since the driver was first introduced, so it seems fair to fix them together in a single commit. Fixes: 1ab7f2a43558 ("staging: mt7621-spi: add mt7621 support") Signed-off-by: Lukas Wunner <lukas@wunner.de> Reviewed-by: Stefan Roese <sr@denx.de> Cc: <stable@vger.kernel.org> # v4.17+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation Cc: <stable@vger.kernel.org> # v4.17+ --- drivers/spi/spi-mt7621.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)