2007-12-09 21:22:34

by Marcin Ślusarz

[permalink] [raw]
Subject: [PATCH] usb/storage/initializers.c: fix signedness difference

usb/storage/initializers.c: fix signedness difference

Signed-off-by: Marcin Ślusarz <[email protected]>
---
drivers/usb/storage/initializers.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
index ee5b42a..187dd1e 100644
--- a/drivers/usb/storage/initializers.c
+++ b/drivers/usb/storage/initializers.c
@@ -66,7 +66,8 @@ int usb_stor_ucr61s2b_init(struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
- int res, partial;
+ int res;
+ unsigned int partial;
static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";

US_DEBUGP("Sending UCR-61S2B initialization packet...\n");


2007-12-18 23:37:01

by Andrew Morton

[permalink] [raw]
Subject: Re: [PATCH] usb/storage/initializers.c: fix signedness difference

On Sun, 9 Dec 2007 22:23:42 +0100
Marcin __lusarz <[email protected]> wrote:

> usb/storage/initializers.c: fix signedness difference
>
> Signed-off-by: Marcin __lusarz <[email protected]>
> ---
> drivers/usb/storage/initializers.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
> index ee5b42a..187dd1e 100644
> --- a/drivers/usb/storage/initializers.c
> +++ b/drivers/usb/storage/initializers.c
> @@ -66,7 +66,8 @@ int usb_stor_ucr61s2b_init(struct us_data *us)
> {
> struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
> struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
> - int res, partial;
> + int res;
> + unsigned int partial;
> static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
>
> US_DEBUGP("Sending UCR-61S2B initialization packet...\n");

Often we just wouldn't bother about something this minor.

But I see later on that we pass the address of `partial' into some other
function and I am guessing that this produces some warning with some tool
which you didn't tell us about?

2007-12-19 18:14:42

by Marcin Ślusarz

[permalink] [raw]
Subject: Re: [PATCH] usb/storage/initializers.c: fix signedness difference

On Tue, Dec 18, 2007 at 03:36:42PM -0800, Andrew Morton wrote:
> On Sun, 9 Dec 2007 22:23:42 +0100
> Marcin __lusarz <[email protected]> wrote:
>
> > usb/storage/initializers.c: fix signedness difference
> >
> > Signed-off-by: Marcin __lusarz <[email protected]>
> > ---
> > drivers/usb/storage/initializers.c | 3 ++-
> > 1 files changed, 2 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
> > index ee5b42a..187dd1e 100644
> > --- a/drivers/usb/storage/initializers.c
> > +++ b/drivers/usb/storage/initializers.c
> > @@ -66,7 +66,8 @@ int usb_stor_ucr61s2b_init(struct us_data *us)
> > {
> > struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
> > struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
> > - int res, partial;
> > + int res;
> > + unsigned int partial;
> > static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
> >
> > US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
>
> Often we just wouldn't bother about something this minor.
>
> But I see later on that we pass the address of `partial' into some other
> function and I am guessing that this produces some warning with some tool
> which you didn't tell us about?
it fixed 2 sparse warnings:
drivers/usb/storage/initializers.c:83:26: warning: incorrect type in argument 5 (different signedness)
drivers/usb/storage/initializers.c:83:26: expected unsigned int *act_len
drivers/usb/storage/initializers.c:83:26: got int *<noident>
drivers/usb/storage/initializers.c:89:26: warning: incorrect type in argument 5 (different signedness)
drivers/usb/storage/initializers.c:89:26: expected unsigned int *act_len
drivers/usb/storage/initializers.c:89:26: got int *<noident>

After you pointed out that I should include warnings in patch description,
I've sent this: http://lkml.org/lkml/2007/12/15/157

Marcin