[PATCH 0/2] functions with useless return

[PATCH 0/2] functions with useless return

[Stephen Hemminger]

Fix a couple of cases (there are more) where functions
always return 0, by changing them to be void.

Stephen Hemminger (2):
  log: rte_openlog_stream should be void
  eal: pci probe and adjust_config should be void

 lib/librte_eal/common/eal_common_log.c     | 3 +--
 lib/librte_eal/common/eal_common_options.c | 3 +--
 lib/librte_eal/common/eal_common_pci.c     | 7 ++-----
 lib/librte_eal/common/eal_options.h        | 2 +-
 lib/librte_eal/common/include/rte_log.h    | 5 +----
 lib/librte_eal/common/include/rte_pci.h    | 6 +-----
 lib/librte_eal/linuxapp/eal/eal.c          | 6 ++----
 7 files changed, 9 insertions(+), 23 deletions(-)

-- 
2.1.4

[PATCH 1/2] log: rte_openlog_stream should be void

[Stephen Hemminger]

Function always returned 0 and no one was checking anyway.

Signed-off-by: Stephen Hemminger <stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org>
---
 lib/librte_eal/common/eal_common_log.c  | 3 +--
 lib/librte_eal/common/include/rte_log.h | 5 +----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index ff44d23..3802f9c 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -158,14 +158,13 @@ rte_log_set_history(int enable)
 }
 
 /* Change the stream that will be used by logging system */
-int
+void
 rte_openlog_stream(FILE *f)
 {
 	if (f == NULL)
 		rte_logs.file = default_log_stream;
 	else
 		rte_logs.file = f;
-	return 0;
 }
 
 /* Set global log level */
diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
index f83a0d9..888ee19 100644
--- a/lib/librte_eal/common/include/rte_log.h
+++ b/lib/librte_eal/common/include/rte_log.h
@@ -110,11 +110,8 @@ extern FILE *eal_default_log_stream;
  *
  * @param f
  *   Pointer to the stream.
- * @return
- *   - 0 on success.
- *   - Negative on error.
  */
-int rte_openlog_stream(FILE *f);
+void rte_openlog_stream(FILE *f);
 
 /**
  * Set the global log level.
-- 
2.1.4

[PATCH 2/2] eal: pci probe and adjust_config should be void

[Stephen Hemminger]

This functions always returned 0 and therefore should be void.

Signed-off-by: Stephen Hemminger <stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org>
---
 lib/librte_eal/common/eal_common_options.c | 3 +--
 lib/librte_eal/common/eal_common_pci.c     | 7 ++-----
 lib/librte_eal/common/eal_options.h        | 2 +-
 lib/librte_eal/common/include/rte_pci.h    | 6 +-----
 lib/librte_eal/linuxapp/eal/eal.c          | 6 ++----
 5 files changed, 7 insertions(+), 17 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 8fcb1ab..f47b401 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -794,7 +794,7 @@ eal_parse_common_option(int opt, const char *optarg,
 	return 0;
 }
 
-int
+void
 eal_adjust_config(struct internal_config *internal_cfg)
 {
 	int i;
@@ -812,7 +812,6 @@ eal_adjust_config(struct internal_config *internal_cfg)
 	for (i = 0; i < RTE_MAX_NUMA_NODES; i++)
 		internal_cfg->memory += internal_cfg->socket_mem[i];
 
-	return 0;
 }
 
 int
diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index 808b87b..93c8e84 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -223,7 +223,7 @@ err_return:
  * all registered drivers that have a matching entry in its id_table
  * for discovered devices.
  */
-int
+void
 rte_eal_pci_probe(void)
 {
 	struct rte_pci_device *dev = NULL;
@@ -252,12 +252,10 @@ rte_eal_pci_probe(void)
 				 " cannot be used\n", dev->addr.domain, dev->addr.bus,
 				 dev->addr.devid, dev->addr.function);
 	}
-
-	return 0;
 }
 
 /* dump one device */
-static int
+static void
 pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
 {
 	int i;
@@ -273,7 +271,6 @@ pci_dump_one_device(FILE *f, struct rte_pci_device *dev)
 			dev->mem_resource[i].phys_addr,
 			dev->mem_resource[i].len);
 	}
-	return 0;
 }
 
 /* dump devices on the bus */
diff --git a/lib/librte_eal/common/eal_options.h b/lib/librte_eal/common/eal_options.h
index f6714d9..59a0f39 100644
--- a/lib/librte_eal/common/eal_options.h
+++ b/lib/librte_eal/common/eal_options.h
@@ -89,7 +89,7 @@ extern const struct option eal_long_options[];
 
 int eal_parse_common_option(int opt, const char *argv,
 			    struct internal_config *conf);
-int eal_adjust_config(struct internal_config *internal_cfg);
+void eal_adjust_config(struct internal_config *internal_cfg);
 int eal_check_common_options(struct internal_config *internal_cfg);
 void eal_common_usage(void);
 enum rte_proc_type_t eal_proc_type_detect(void);
diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h
index 785852d..052d3da 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -327,12 +327,8 @@ int rte_eal_pci_scan(void);
  * Scan the content of the PCI bus, and call the probe() function for
  * all registered drivers that have a matching entry in its id_table
  * for discovered devices.
- *
- * @return
- *   - 0 on success.
- *   - Negative on error.
  */
-int rte_eal_pci_probe(void);
+void rte_eal_pci_probe(void);
 
 #ifdef RTE_LIBRTE_EAL_HOTPLUG
 /**
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index bd770cf..e2a5468 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -621,8 +621,7 @@ eal_parse_args(int argc, char **argv)
 		}
 	}
 
-	if (eal_adjust_config(&internal_config) != 0)
-		return -1;
+	eal_adjust_config(&internal_config);
 
 	/* sanity checks */
 	if (eal_check_common_options(&internal_config) != 0) {
@@ -842,8 +841,7 @@ rte_eal_init(int argc, char **argv)
 	rte_eal_mp_wait_lcore();
 
 	/* Probe & Initialize PCI devices */
-	if (rte_eal_pci_probe())
-		rte_panic("Cannot probe PCI\n");
+	rte_eal_pci_probe();
 
 	return fctret;
 }
-- 
2.1.4

Re: [PATCH 0/2] functions with useless return

[Neil Horman]

On Fri, Apr 17, 2015 at 08:35:32AM -0700, Stephen Hemminger wrote:
> Fix a couple of cases (there are more) where functions
> always return 0, by changing them to be void.
> 
> Stephen Hemminger (2):
>   log: rte_openlog_stream should be void
>   eal: pci probe and adjust_config should be void
> 
>  lib/librte_eal/common/eal_common_log.c     | 3 +--
>  lib/librte_eal/common/eal_common_options.c | 3 +--
>  lib/librte_eal/common/eal_common_pci.c     | 7 ++-----
>  lib/librte_eal/common/eal_options.h        | 2 +-
>  lib/librte_eal/common/include/rte_log.h    | 5 +----
>  lib/librte_eal/common/include/rte_pci.h    | 6 +-----
>  lib/librte_eal/linuxapp/eal/eal.c          | 6 ++----
>  7 files changed, 9 insertions(+), 23 deletions(-)
> 
> -- 
> 2.1.4
> 
> 
Series
Acked-by: Neil Horman <nhorman-2XuSBdqkA4R54TAoqtyWWQ@public.gmane.org>

Re: [PATCH 2/2] eal: pci probe and adjust_config should be void

[Thomas Monjalon]

2015-04-17 08:35, Stephen Hemminger:
> This functions always returned 0 and therefore should be void.
> 
> Signed-off-by: Stephen Hemminger <stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org>
> ---
>  lib/librte_eal/common/eal_common_options.c | 3 +--
>  lib/librte_eal/common/eal_common_pci.c     | 7 ++-----
>  lib/librte_eal/common/eal_options.h        | 2 +-
>  lib/librte_eal/common/include/rte_pci.h    | 6 +-----
>  lib/librte_eal/linuxapp/eal/eal.c          | 6 ++----
>  5 files changed, 7 insertions(+), 17 deletions(-)

Why bsdapp is not changed?
You posted a similar patch few days before which was modifying bsdapp:
	http://dpdk.org/dev/patchwork/patch/4306/

Re: [PATCH 1/2] log: rte_openlog_stream should be void

[Bruce Richardson]

On Fri, Apr 17, 2015 at 08:35:33AM -0700, Stephen Hemminger wrote:
> Function always returned 0 and no one was checking anyway.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Acked-by: Bruce Richardson <bruce.richardson@intel.com>

> ---
>  lib/librte_eal/common/eal_common_log.c  | 3 +--
>  lib/librte_eal/common/include/rte_log.h | 5 +----
>  2 files changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
> index ff44d23..3802f9c 100644
> --- a/lib/librte_eal/common/eal_common_log.c
> +++ b/lib/librte_eal/common/eal_common_log.c
> @@ -158,14 +158,13 @@ rte_log_set_history(int enable)
>  }
>  
>  /* Change the stream that will be used by logging system */
> -int
> +void
>  rte_openlog_stream(FILE *f)
>  {
>  	if (f == NULL)
>  		rte_logs.file = default_log_stream;
>  	else
>  		rte_logs.file = f;
> -	return 0;
>  }
>  
>  /* Set global log level */
> diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
> index f83a0d9..888ee19 100644
> --- a/lib/librte_eal/common/include/rte_log.h
> +++ b/lib/librte_eal/common/include/rte_log.h
> @@ -110,11 +110,8 @@ extern FILE *eal_default_log_stream;
>   *
>   * @param f
>   *   Pointer to the stream.
> - * @return
> - *   - 0 on success.
> - *   - Negative on error.
>   */
> -int rte_openlog_stream(FILE *f);
> +void rte_openlog_stream(FILE *f);
>  
>  /**
>   * Set the global log level.
> -- 
> 2.1.4
> 

Re: [PATCH 1/2] log: rte_openlog_stream should be void

[Stephen Hemminger]

On Tue, 19 May 2015 11:24:03 +0100
Bruce Richardson <bruce.richardson@intel.com> wrote:

> On Fri, Apr 17, 2015 at 08:35:33AM -0700, Stephen Hemminger wrote:
> > Function always returned 0 and no one was checking anyway.
> > 
> > Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> 
> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> 
> > ---
> >  lib/librte_eal/common/eal_common_log.c  | 3 +--
> >  lib/librte_eal/common/include/rte_log.h | 5 +----
> >  2 files changed, 2 insertions(+), 6 deletions(-)
> > 
> > diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
> > index ff44d23..3802f9c 100644
> > --- a/lib/librte_eal/common/eal_common_log.c
> > +++ b/lib/librte_eal/common/eal_common_log.c
> > @@ -158,14 +158,13 @@ rte_log_set_history(int enable)
> >  }
> >  
> >  /* Change the stream that will be used by logging system */
> > -int
> > +void
> >  rte_openlog_stream(FILE *f)
> >  {
> >  	if (f == NULL)
> >  		rte_logs.file = default_log_stream;
> >  	else
> >  		rte_logs.file = f;
> > -	return 0;
> >  }
> >  
> >  /* Set global log level */
> > diff --git a/lib/librte_eal/common/include/rte_log.h b/lib/librte_eal/common/include/rte_log.h
> > index f83a0d9..888ee19 100644
> > --- a/lib/librte_eal/common/include/rte_log.h
> > +++ b/lib/librte_eal/common/include/rte_log.h
> > @@ -110,11 +110,8 @@ extern FILE *eal_default_log_stream;
> >   *
> >   * @param f
> >   *   Pointer to the stream.
> > - * @return
> > - *   - 0 on success.
> > - *   - Negative on error.
> >   */
> > -int rte_openlog_stream(FILE *f);
> > +void rte_openlog_stream(FILE *f);
> >  
> >  /**
> >   * Set the global log level.
> > -- 
> > 2.1.4
> > 

Yes it should be void, but technically this is an ABI change.
Please drop the patch.