2021-04-01 10:30:01

by Jiapeng Chong

Subject: [PATCH] xhci: remove unused variable

Fix the following clang warning:

drivers/usb/host/xhci.c:1346:15: warning: variable ‘len’ set but not
used [-Wunused-but-set-variable].

Reported-by: Abaci Robot <[email protected]>
Signed-off-by: Jiapeng Chong <[email protected]>
---
drivers/usb/host/xhci.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 1975016..0ead09c 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1343,7 +1343,6 @@ static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,

static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
{
- unsigned int len;
unsigned int buf_len;
enum dma_data_direction dir;

@@ -1359,10 +1358,9 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
dir);

if (usb_urb_dir_in(urb))
- len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
- urb->transfer_buffer,
- buf_len,
- 0);
+ sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
+ urb->transfer_buffer,
+ buf_len, 0);

urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
kfree(urb->transfer_buffer);
--
1.8.3.1

2021-04-01 10:45:47

by Greg Kroah-Hartman

Subject: Re: [PATCH] xhci: remove unused variable

On Thu, Apr 01, 2021 at 06:17:15PM +0800, Jiapeng Chong wrote:
> Fix the following clang warning:
>
> drivers/usb/host/xhci.c:1346:15: warning: variable ‘len’ set but not
> used [-Wunused-but-set-variable].
>
> Reported-by: Abaci Robot <[email protected]>
> Signed-off-by: Jiapeng Chong <[email protected]>
> ---
> drivers/usb/host/xhci.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index 1975016..0ead09c 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -1343,7 +1343,6 @@ static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,
>
> static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
> {
> - unsigned int len;
> unsigned int buf_len;
> enum dma_data_direction dir;
>
> @@ -1359,10 +1358,9 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
> dir);
>
> if (usb_urb_dir_in(urb))
> - len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
> - urb->transfer_buffer,
> - buf_len,
> - 0);
> + sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
> + urb->transfer_buffer,
> + buf_len, 0);
>
> urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
> kfree(urb->transfer_buffer);
> --
> 1.8.3.1
>

Why resubmit this same change when I rejected it in the past?

{sigh}

greg k-h

2021-04-21 10:44:14

by Jiapeng Chong

Subject: Re: [PATCH] xhci: remove unused variable

On 2021/4/1 18:44, Greg KH wrote:
> On Thu, Apr 01, 2021 at 06:17:15PM +0800, Jiapeng Chong wrote:
>> Fix the following clang warning:
>>
>> drivers/usb/host/xhci.c:1346:15: warning: variable ‘len’ set but not
>> used [-Wunused-but-set-variable].
>>
>> Reported-by: Abaci Robot <[email protected]>
>> Signed-off-by: Jiapeng Chong <[email protected]>
>> ---
>> drivers/usb/host/xhci.c | 8 +++-----
>> 1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
>> index 1975016..0ead09c 100644
>> --- a/drivers/usb/host/xhci.c
>> +++ b/drivers/usb/host/xhci.c
>> @@ -1343,7 +1343,6 @@ static bool xhci_urb_temp_buffer_required(struct usb_hcd *hcd,
>>
>> static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
>> {
>> - unsigned int len;
>> unsigned int buf_len;
>> enum dma_data_direction dir;
>>
>> @@ -1359,10 +1358,9 @@ static void xhci_unmap_temp_buf(struct usb_hcd *hcd, struct urb *urb)
>> dir);
>>
>> if (usb_urb_dir_in(urb))
>> - len = sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
>> - urb->transfer_buffer,
>> - buf_len,
>> - 0);
>> + sg_pcopy_from_buffer(urb->sg, urb->num_sgs,
>> + urb->transfer_buffer,
>> + buf_len, 0);
>>
>> urb->transfer_flags &= ~URB_DMA_MAP_SINGLE;
>> kfree(urb->transfer_buffer);
>> --
>> 1.8.3.1
>>
>
> Why resubmit this same change when I rejected it in the past?
>
> {sigh}
>
> greg k-h
>

Thanks for reminding us. We'll pay more attention next time.