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authorStephen Boyd <sboyd@kernel.org>2023-04-13 13:55:28 -0700
committerStephen Boyd <sboyd@kernel.org>2023-04-13 15:45:46 -0700
commitd1aae06630230daf747ef5bc291c19ea7f046129 (patch)
tree98401f569fd481dde7ad9af2201324ee4d9f8b29 /drivers/reset
parent601e5d464d535d655917c2cfb29c394d367fb676 (diff)
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clk: starfive: Avoid casting iomem pointers
Let's use a wrapper struct for the auxiliary_device made in jh7110_reset_controller_register() so that we can stop casting iomem pointers. The casts trip up tools like sparse, and make for some awkward casts that are largely unnecessary. While we're here, change the allocation from devm and actually free the auxiliary_device memory in the release function. This avoids any use after free problems where the parent device driver is unbound from the device but the auxiliuary_device is still in use accessing devm freed memory. Cc: Tommaso Merciai <tomm.merciai@gmail.com> Cc: Emil Renner Berthing <emil.renner.berthing@canonical.com> Cc: Hal Feng <hal.feng@starfivetech.com> Cc: Conor Dooley <conor.dooley@microchip.com> Cc: Xingyu Wu <xingyu.wu@starfivetech.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Fixes: edab7204afe5 ("clk: starfive: Add StarFive JH7110 system clock driver") Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20230413205528.4044216-1-sboyd@kernel.org
Diffstat (limited to 'drivers/reset')
-rw-r--r--drivers/reset/starfive/reset-starfive-jh7110.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/reset/starfive/reset-starfive-jh7110.c b/drivers/reset/starfive/reset-starfive-jh7110.c
index c1b3a490d951..2d26ae95c8cc 100644
--- a/drivers/reset/starfive/reset-starfive-jh7110.c
+++ b/drivers/reset/starfive/reset-starfive-jh7110.c
@@ -7,6 +7,8 @@
#include <linux/auxiliary_bus.h>
+#include <soc/starfive/reset-starfive-jh71x0.h>
+
#include "reset-starfive-jh71x0.h"
#include <dt-bindings/reset/starfive,jh7110-crg.h>
@@ -33,14 +35,15 @@ static int jh7110_reset_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
- void __iomem **base = (void __iomem **)dev_get_drvdata(adev->dev.parent);
+ struct jh71x0_reset_adev *rdev = to_jh71x0_reset_adev(adev);
+ void __iomem *base = rdev->base;
if (!info || !base)
return -ENODEV;
return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
- *base + info->assert_offset,
- *base + info->status_offset,
+ base + info->assert_offset,
+ base + info->status_offset,
NULL,
info->nr_resets,
NULL);