2019-08-09 17:39:44

by Colin King

[permalink] [raw]
Subject: [PATCH] USB: storage: isd200: remove redundant assignment to variable sendToTransport

From: Colin Ian King <[email protected]>

The variable sendToTransport is being initialized with a value that is
never read and is being re-assigned a little later on. The assignment
is redundant and hence can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <[email protected]>
---
drivers/usb/storage/isd200.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
index 2b474d60b4db..28e1128d53a4 100644
--- a/drivers/usb/storage/isd200.c
+++ b/drivers/usb/storage/isd200.c
@@ -1511,7 +1511,7 @@ static int isd200_Initialization(struct us_data *us)

static void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
{
- int sendToTransport = 1, orig_bufflen;
+ int sendToTransport, orig_bufflen;
union ata_cdb ataCdb;

/* Make sure driver was initialized */
--
2.20.1


2019-08-09 19:29:58

by Alan Stern

[permalink] [raw]
Subject: Re: [PATCH] USB: storage: isd200: remove redundant assignment to variable sendToTransport

On Fri, 9 Aug 2019, Colin King wrote:

> From: Colin Ian King <[email protected]>
>
> The variable sendToTransport is being initialized with a value that is
> never read and is being re-assigned a little later on. The assignment
> is redundant and hence can be removed.
>
> Addresses-Coverity: ("Unused value")

Of what use is that tag to general kernel developers?

> Signed-off-by: Colin Ian King <[email protected]>
> ---
> drivers/usb/storage/isd200.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
> index 2b474d60b4db..28e1128d53a4 100644
> --- a/drivers/usb/storage/isd200.c
> +++ b/drivers/usb/storage/isd200.c
> @@ -1511,7 +1511,7 @@ static int isd200_Initialization(struct us_data *us)
>
> static void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
> {
> - int sendToTransport = 1, orig_bufflen;
> + int sendToTransport, orig_bufflen;
> union ata_cdb ataCdb;
>
> /* Make sure driver was initialized */

Otherwise:

Acked-by: Alan Stern <[email protected]>

Alan Stern

2019-08-09 19:33:33

by Colin King

[permalink] [raw]
Subject: Re: [PATCH] USB: storage: isd200: remove redundant assignment to variable sendToTransport

On 09/08/2019 20:29, Alan Stern wrote:
> On Fri, 9 Aug 2019, Colin King wrote:
>
>> From: Colin Ian King <[email protected]>
>>
>> The variable sendToTransport is being initialized with a value that is
>> never read and is being re-assigned a little later on. The assignment
>> is redundant and hence can be removed.
>>
>> Addresses-Coverity: ("Unused value")
>
> Of what use is that tag to general kernel developers?

This is being informally used so that we can track which bugs are
getting found with specific static analysis tools. The public coverity
bug reports also have a CID# number. I'm working on range of coverity
builds (different build configs) that are not public because I can crank
multiple builds per day to find issues.

Colin

>
>> Signed-off-by: Colin Ian King <[email protected]>
>> ---
>> drivers/usb/storage/isd200.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
>> index 2b474d60b4db..28e1128d53a4 100644
>> --- a/drivers/usb/storage/isd200.c
>> +++ b/drivers/usb/storage/isd200.c
>> @@ -1511,7 +1511,7 @@ static int isd200_Initialization(struct us_data *us)
>>
>> static void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
>> {
>> - int sendToTransport = 1, orig_bufflen;
>> + int sendToTransport, orig_bufflen;
>> union ata_cdb ataCdb;
>>
>> /* Make sure driver was initialized */
>
> Otherwise:
>
> Acked-by: Alan Stern <[email protected]>
>
> Alan Stern
>