[PATCH] usb: gadget: Fix unsigned comparison with less than zero

[PATCH] usb: gadget: Fix unsigned comparison with less than zero

[Jiapeng Chong]

This was found by coccicheck:

./drivers/usb/gadget/udc/aspeed_udc.c:496:8-13: WARNING: Unsigned expression compared with zero: chunk >= 0.

Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
 drivers/usb/gadget/udc/aspeed_udc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/udc/aspeed_udc.c b/drivers/usb/gadget/udc/aspeed_udc.c
index 1fc15228ff15..387a7abdcee4 100644
--- a/drivers/usb/gadget/udc/aspeed_udc.c
+++ b/drivers/usb/gadget/udc/aspeed_udc.c
@@ -476,8 +476,8 @@ static int ast_dma_descriptor_setup(struct ast_udc_ep *ep, u32 dma_buf,
 {
 	struct ast_udc_dev *udc = ep->udc;
 	struct device *dev = &udc->pdev->dev;
-	u32 offset, chunk;
-	int count, last;
+	u32 offset;
+	int count, last, chunk;
 
 	if (!ep->descs) {
 		dev_warn(dev, "%s: Empty DMA descs list failure\n",
-- 
2.20.1.7.g153144c


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Re: [PATCH] usb: gadget: Fix unsigned comparison with less than zero

[Greg KH]

On Thu, Jun 23, 2022 at 04:43:47PM +0800, Jiapeng Chong wrote:
> This was found by coccicheck:
> 
> ./drivers/usb/gadget/udc/aspeed_udc.c:496:8-13: WARNING: Unsigned expression compared with zero: chunk >= 0.

What does this mean?  Where is the error?

Please explain the reason for changes, not just the output of a random
tool that you ran on the code.

> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>

What commit does this fix?

thanks,

greg k-h

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Re: 回复：[PATCH] usb: gadget: Fix unsigned comparison with less than zero

[Greg KH]

On Wed, Jun 29, 2022 at 01:51:01PM +0800, Jiapeng.Chong wrote:
> Sorry, we didn't see this patch.
> commit c09b1f372e746aeeb61ef8ffe0fea3970fd9273e

I am sorry, I do not understand what you mean here at all.

confused,

greg k-h

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