From 9f515b6898d0f2c1b9eb34ae9986794045f34e2b Mon Sep 17 00:00:00 2001 From: Jaroslav Kysela Date: Tue, 17 Jun 2008 16:20:13 +0200 Subject: [PATCH] ALSA: emu10k1 - fix possible memory leak in memory allocation routines The leak was introduced in "[ALSA] emu10k1 - simplify page allocation for synth" commit. Signed-off-by: Jaroslav Kysela --- sound/pci/emu10k1/memory.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/sound/pci/emu10k1/memory.c b/sound/pci/emu10k1/memory.c index 42943b4fcb7b..759e29f89478 100644 --- a/sound/pci/emu10k1/memory.c +++ b/sound/pci/emu10k1/memory.c @@ -464,11 +464,17 @@ static int synth_alloc_pages(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk /* first try to allocate from <4GB zone */ struct page *p = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_NOWARN); - if (!p || (page_to_pfn(p) & ~(emu->dma_mask >> PAGE_SHIFT))) + if (!p || (page_to_pfn(p) & ~(emu->dma_mask >> PAGE_SHIFT))) { /* try to allocate from <16MB zone */ - p = alloc_page(GFP_ATOMIC | GFP_DMA | + struct page *p1 = + alloc_page(GFP_ATOMIC | GFP_DMA | __GFP_NORETRY | /* no OOM-killer */ __GFP_NOWARN); + /* free page outside dma_mask range */ + if (p) + free_page((unsigned long)page_address(p)); + p = p1; + } if (!p) { __synth_free_pages(emu, first_page, page - 1); return -ENOMEM; -- 2.20.1