From: Michael Kelley Date: Thu, 13 Apr 2023 15:37:30 +0000 (-0700) Subject: swiotlb: fix debugfs reporting of reserved memory pools X-Git-Tag: v6.1.28~100 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4aa9243ebe1562e8c7136e637265e515c8790c9d;p=users%2Fdwmw2%2Flinux.git swiotlb: fix debugfs reporting of reserved memory pools [ 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 Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index bf1ed08ec541f..7f4ad5e70b40c 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -919,7 +919,9 @@ 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"); @@ -932,7 +934,7 @@ 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); }