linux-kernel - [PATCH] dma: intel_mid_dma: fix double free on mid_setup

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Date:	Tue, 02 Nov 2010 09:52:17 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH] dma: intel_mid_dma: fix double free on mid_setup_dma error
	path

We should not call kfree(dma) in mid_setup_dma error path because
the memory is allocated in intel_mid_dma_probe and will be freed
in intel_mid_dma_probe error path if mid_setup_dma return error.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/dma/intel_mid_dma.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c
index 338bc4e..4c55d45 100644
--- a/drivers/dma/intel_mid_dma.c
+++ b/drivers/dma/intel_mid_dma.c
@@ -1075,7 +1075,6 @@ static int mid_setup_dma(struct pci_dev *pdev)
 	if (NULL == dma->dma_pool) {
 		pr_err("ERR_MDMA:pci_pool_create failed\n");
 		err = -ENOMEM;
-		kfree(dma);
 		goto err_dma_pool;
 	}
 
@@ -1186,7 +1185,6 @@ err_engine:
 	free_irq(pdev->irq, dma);
 err_irq:
 	pci_pool_destroy(dma->dma_pool);
-	kfree(dma);
 err_dma_pool:
 	pr_err("ERR_MDMA:setup_dma failed: %d\n", err);
 	return err;
-- 
1.7.2



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