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thunderbolt: Fix memory leaks in {port|retimer}_sb_regs_write()

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Add missing free_page() call for the memory allocated by
validate_and_copy_from_user().

Fixes: 6d241fa001 ("thunderbolt: Add sideband register access to debugfs")
Signed-off-by: Aapo Vienamo <aapo.vienamo@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Aapo Vienamo 2024-06-20 13:43:03 +03:00 committed by Mika Westerberg
parent 8400291e28
commit ab3de2c7ec
1 changed files with 6 additions and 4 deletions
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10
drivers/thunderbolt/debugfs.c
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@ -323,16 +323,17 @@ static ssize_t port_sb_regs_write(struct file *file, const char __user *user_buf
if (mutex_lock_interruptible(&tb->lock)) {
ret = -ERESTARTSYS;
goto out_rpm_put;
goto out;
}
ret = sb_regs_write(port, port_sb_regs, ARRAY_SIZE(port_sb_regs),
USB4_SB_TARGET_ROUTER, 0, buf, count, ppos);
mutex_unlock(&tb->lock);
out_rpm_put:
out:
pm_runtime_mark_last_busy(&sw->dev);
pm_runtime_put_autosuspend(&sw->dev);
free_page((unsigned long)buf);
return ret < 0 ? ret : count;
}
@ -355,16 +356,17 @@ static ssize_t retimer_sb_regs_write(struct file *file,
if (mutex_lock_interruptible(&tb->lock)) {
ret = -ERESTARTSYS;
goto out_rpm_put;
goto out;
}
ret = sb_regs_write(rt->port, retimer_sb_regs, ARRAY_SIZE(retimer_sb_regs),
USB4_SB_TARGET_RETIMER, rt->index, buf, count, ppos);
mutex_unlock(&tb->lock);
out_rpm_put:
out:
pm_runtime_mark_last_busy(&rt->dev);
pm_runtime_put_autosuspend(&rt->dev);
free_page((unsigned long)buf);
return ret < 0 ? ret : count;
}