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swiotlb: fix debugfs reporting of reserved memory pools 

[ Upstream commit 5499d01c02 ]

For io_tlb_nslabs, the debugfs code reports the correct value for a
specific reserved memory pool.  But for io_tlb_used, the value reported
is always for the default pool, not the specific reserved pool. Fix this.

Fixes: 5c850d3188 ("swiotlb: fix passing local variable to debugfs_create_ulong()")
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michael Kelley 2023-04-13 08:37:30 -07:00 committed by Greg Kroah-Hartman
parent be138dfeba
commit eceb1cd49c
1 changed files with 4 additions and 2 deletions
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6
kernel/dma/swiotlb.c
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@ -935,7 +935,9 @@ EXPORT_SYMBOL_GPL(is_swiotlb_active);
static int io_tlb_used_get(void *data, u64 *val)
{
*val = mem_used(&io_tlb_default_mem);
struct io_tlb_mem *mem = data;
*val = mem_used(mem);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_io_tlb_used, io_tlb_used_get, NULL, "%llu\n");
@ -948,7 +950,7 @@ static void swiotlb_create_debugfs_files(struct io_tlb_mem *mem,
return;
debugfs_create_ulong("io_tlb_nslabs", 0400, mem->debugfs, &mem->nslabs);
debugfs_create_file("io_tlb_used", 0400, mem->debugfs, NULL,
debugfs_create_file("io_tlb_used", 0400, mem->debugfs, mem,
&fops_io_tlb_used);
}