From: Lukas Wunner <lukas@xxxxxxxxx>
commit 8f96c434dfbc85ffa755d6634c8c1cb2233fcf24 upstream.
spi_geni_remove() accesses the driver's private data after calling
spi_unregister_master() even though that function releases the last
reference on the spi_master and thereby frees the private data.
Moreover, since commit 1a9e489e6128 ("spi: spi-geni-qcom: Use OPP API to
set clk/perf state"), spi_geni_probe() leaks the spi_master allocation
if the calls to dev_pm_opp_set_clkname() or dev_pm_opp_of_add_table()
fail.
Fix by switching over to the new devm_spi_alloc_master() helper which
keeps the private data accessible until the driver has unbound and also
avoids the spi_master leak on probe.
Fixes: 561de45f72bd ("spi: spi-geni-qcom: Add SPI driver support for GENI based QUP")
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v4.20+: 5e844cc37a5c: spi: Introduce device-managed SPI controller allocation
Cc: <stable@xxxxxxxxxxxxxxx> # v4.20+
Cc: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
Cc: Girish Mahadevan <girishm@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/dfa1d8c41b8acdfad87ec8654cd124e6e3cb3f31.1607286887.git.lukas@xxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-geni-qcom.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/spi/spi-geni-qcom.c
+++ b/drivers/spi/spi-geni-qcom.c
@@ -603,7 +603,7 @@ static int spi_geni_probe(struct platfor
if (IS_ERR(clk))
return PTR_ERR(clk);
- spi = spi_alloc_master(dev, sizeof(*mas));
+ spi = devm_spi_alloc_master(dev, sizeof(*mas));
if (!spi)
return -ENOMEM;
@@ -673,7 +673,6 @@ spi_geni_probe_free_irq:
free_irq(mas->irq, spi);
spi_geni_probe_runtime_disable:
pm_runtime_disable(dev);
- spi_master_put(spi);
dev_pm_opp_of_remove_table(&pdev->dev);
put_clkname:
dev_pm_opp_put_clkname(mas->se.opp_table);
