From: Michael Kelley mikelley@microsoft.com
[ Upstream commit 5499d01c029069044a3b3e50501c77b474c96178 ]
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: 5c850d31880e ("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 --- kernel/dma/swiotlb.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 2bb9e3b023802..09d2f4877d0f4 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -930,7 +930,9 @@ 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"); @@ -943,7 +945,7 @@ 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); }