cb2d3883c6
During the MSI bitmap test on boot kmemleak spews the following trace:
unreferenced object 0xc00000016e86c900 (size 64):
comm "swapper/0", pid 1, jiffies 4294893173 (age 518.024s)
hex dump (first 32 bytes):
00 00 01 ff 7f ff 7f 37 00 00 00 00 00 00 00 00
.......7........
ff ff ff ff ff ff ff ff 01 ff ff ff ff
ff ff ff
................
backtrace:
[<c00000000003eebc>] .zalloc_maybe_bootmem+0x3c/0x380
[<c000000000042d6c>] .msi_bitmap_alloc+0x3c/0xb0
[<c000000000a9aff8>] .msi_bitmap_selftest+0x30/0x2b4
[<c0000000000090f4>] .do_one_initcall+0xd4/0x270
[<c000000000a8e250>] .kernel_init_freeable+0x1a0/0x280
[<c000000000009b5c>] .kernel_init+0x1c/0x120
[<c000000000007fbc>] .ret_from_kernel_thread+0x58/0x9c
Add a flag to msi_bitmap for tracking allocations from slab and memblock
so we can properly free/handle memory in msi_bitmap_free().
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
[mpe: Reword changelog & use bitmap_from_slab in the if]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
37 lines
1 KiB
C
37 lines
1 KiB
C
#ifndef _POWERPC_SYSDEV_MSI_BITMAP_H
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#define _POWERPC_SYSDEV_MSI_BITMAP_H
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/*
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* Copyright 2008, Michael Ellerman, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2 of the
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* License.
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*
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*/
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#include <linux/of.h>
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#include <asm/irq.h>
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struct msi_bitmap {
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struct device_node *of_node;
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unsigned long *bitmap;
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spinlock_t lock;
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unsigned int irq_count;
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bool bitmap_from_slab;
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};
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int msi_bitmap_alloc_hwirqs(struct msi_bitmap *bmp, int num);
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void msi_bitmap_free_hwirqs(struct msi_bitmap *bmp, unsigned int offset,
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unsigned int num);
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void msi_bitmap_reserve_hwirq(struct msi_bitmap *bmp, unsigned int hwirq);
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int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp);
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int msi_bitmap_alloc(struct msi_bitmap *bmp, unsigned int irq_count,
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struct device_node *of_node);
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void msi_bitmap_free(struct msi_bitmap *bmp);
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#endif /* _POWERPC_SYSDEV_MSI_BITMAP_H */
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