linux-kernel - [PATCH] usb: dwc2: Use kmem_cache

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Message-ID: <20160222081032.GA9818@amitoj-Inspiron-3542>
Date:	Mon, 22 Feb 2016 13:40:32 +0530
From:	Amitoj Kaur Chawla <amitoj1606@...il.com>
To:	johnyoun@...opsys.com, gregkh@...uxfoundation.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH] usb: dwc2: Use kmem_cache_free()

Here, free memory is allocated using kmem_cache_zalloc.  So, use
kmem_cache_free instead of kfree.

This is done using Coccinelle and semantic patch used
is as follows:

//<smpl>
@@
expression x,E,c;
@@
 x =
\(kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\)(c,...)
 ... when != x = E
     when != &x
?-kfree(x)
+kmem_cache_free(c,x)
//</smpl>

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
---
 drivers/usb/dwc2/hcd_ddma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/hcd_ddma.c b/drivers/usb/dwc2/hcd_ddma.c
index 36606fc..d6ebd16 100644
--- a/drivers/usb/dwc2/hcd_ddma.c
+++ b/drivers/usb/dwc2/hcd_ddma.c
@@ -111,7 +111,7 @@ static int dwc2_desc_list_alloc(struct dwc2_hsotg *hsotg, struct dwc2_qh *qh,
 		dma_unmap_single(hsotg->dev, qh->desc_list_dma,
 				 qh->desc_list_sz,
 				 DMA_FROM_DEVICE);
-		kfree(qh->desc_list);
+		kmem_cache_free(desc_cache, qh->desc_list);
 		qh->desc_list = NULL;
 		return -ENOMEM;
 	}
-- 
1.9.1