* [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings
@ 2022-04-14 14:02 Yihao Han
2022-04-19 7:54 ` Uwe Kleine-König
2022-04-22 6:44 ` Michael Ellerman
0 siblings, 2 replies; 4+ messages in thread
From: Yihao Han @ 2022-04-14 14:02 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Ulf Hansson, Mark Brown,
Srinivas Pandruvada, William Breathitt Gray, Sven Van Asbroeck,
Corentin Labbe, Yihao Han, Uwe Kleine-König, linuxppc-dev,
linux-kernel
Cc: kernel
drivers/macintosh/macio_asic.c:219:26-29: WARNING:
Suspicious code. resource_size is maybe missing with res
drivers/macintosh/macio_asic.c:221:26-29: WARNING:
Suspicious code. resource_size is maybe missing with res
Use resource_size function on resource object instead of
explicit computation.
Generated by: scripts/coccinelle/api/resource_size.cocci
Signed-off-by: Yihao Han <hanyihao@vivo.com>
---
drivers/macintosh/macio_asic.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 1943a007e2d5..260fccb3863e 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -216,9 +216,9 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res,
/* Some older IDE resources have bogus sizes */
if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
- if (index == 0 && (res->end - res->start) > 0xfff)
+ if (index == 0 && (resource_size(res)) > 0xfff)
res->end = res->start + 0xfff;
- if (index == 1 && (res->end - res->start) > 0xff)
+ if (index == 1 && (resource_size(res)) > 0xff)
res->end = res->start + 0xff;
}
return 0;
--
2.17.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings
2022-04-14 14:02 [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings Yihao Han
@ 2022-04-19 7:54 ` Uwe Kleine-König
2022-04-22 6:44 ` Michael Ellerman
1 sibling, 0 replies; 4+ messages in thread
From: Uwe Kleine-König @ 2022-04-19 7:54 UTC (permalink / raw)
To: Yihao Han
Cc: Benjamin Herrenschmidt, Ulf Hansson, Mark Brown,
Srinivas Pandruvada, William Breathitt Gray, Sven Van Asbroeck,
Corentin Labbe, linuxppc-dev, linux-kernel, kernel
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On Thu, Apr 14, 2022 at 07:02:42AM -0700, Yihao Han wrote:
> drivers/macintosh/macio_asic.c:219:26-29: WARNING:
> Suspicious code. resource_size is maybe missing with res
> drivers/macintosh/macio_asic.c:221:26-29: WARNING:
> Suspicious code. resource_size is maybe missing with res
For log messages it's ok to overstep the line length limitation for
commit logs. IMHO adding newlines is worse, not sure that there are no
other strong opinions though.
> Use resource_size function on resource object instead of
> explicit computation.
>
> Generated by: scripts/coccinelle/api/resource_size.cocci
>
> Signed-off-by: Yihao Han <hanyihao@vivo.com>
> ---
> drivers/macintosh/macio_asic.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
> index 1943a007e2d5..260fccb3863e 100644
> --- a/drivers/macintosh/macio_asic.c
> +++ b/drivers/macintosh/macio_asic.c
> @@ -216,9 +216,9 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res,
> /* Some older IDE resources have bogus sizes */
> if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
> of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
> - if (index == 0 && (res->end - res->start) > 0xfff)
> + if (index == 0 && (resource_size(res)) > 0xfff)
You can drop the parenthesis around resource_size(res) here.
Other than that looks fine,
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings
2022-04-14 14:02 [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings Yihao Han
2022-04-19 7:54 ` Uwe Kleine-König
@ 2022-04-22 6:44 ` Michael Ellerman
2022-04-25 17:23 ` Uwe Kleine-König
1 sibling, 1 reply; 4+ messages in thread
From: Michael Ellerman @ 2022-04-22 6:44 UTC (permalink / raw)
To: Yihao Han, Benjamin Herrenschmidt, Ulf Hansson, Mark Brown,
Srinivas Pandruvada, William Breathitt Gray, Sven Van Asbroeck,
Corentin Labbe, Yihao Han, Uwe Kleine-König, linuxppc-dev,
linux-kernel
Cc: kernel
Yihao Han <hanyihao@vivo.com> writes:
> drivers/macintosh/macio_asic.c:219:26-29: WARNING:
> Suspicious code. resource_size is maybe missing with res
> drivers/macintosh/macio_asic.c:221:26-29: WARNING:
> Suspicious code. resource_size is maybe missing with res
>
> Use resource_size function on resource object instead of
> explicit computation.
>
> Generated by: scripts/coccinelle/api/resource_size.cocci
>
> Signed-off-by: Yihao Han <hanyihao@vivo.com>
> ---
> drivers/macintosh/macio_asic.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
> index 1943a007e2d5..260fccb3863e 100644
> --- a/drivers/macintosh/macio_asic.c
> +++ b/drivers/macintosh/macio_asic.c
> @@ -216,9 +216,9 @@ static int macio_resource_quirks(struct device_node *np, struct resource *res,
> /* Some older IDE resources have bogus sizes */
> if (of_node_name_eq(np, "IDE") || of_node_name_eq(np, "ATA") ||
> of_node_is_type(np, "ide") || of_node_is_type(np, "ata")) {
> - if (index == 0 && (res->end - res->start) > 0xfff)
> + if (index == 0 && (resource_size(res)) > 0xfff)
> res->end = res->start + 0xfff;
> - if (index == 1 && (res->end - res->start) > 0xff)
> + if (index == 1 && (resource_size(res)) > 0xff)
Are you sure the conversion is correct? It's not exactly equivalent:
static inline resource_size_t resource_size(const struct resource *res)
{
return res->end - res->start + 1;
}
cheers
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings
2022-04-22 6:44 ` Michael Ellerman
@ 2022-04-25 17:23 ` Uwe Kleine-König
0 siblings, 0 replies; 4+ messages in thread
From: Uwe Kleine-König @ 2022-04-25 17:23 UTC (permalink / raw)
To: Michael Ellerman
Cc: Yihao Han, Benjamin Herrenschmidt, Ulf Hansson, Mark Brown,
Srinivas Pandruvada, William Breathitt Gray, Sven Van Asbroeck,
Corentin Labbe, linuxppc-dev, linux-kernel, kernel
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Hello Michael,
On Fri, Apr 22, 2022 at 04:44:24PM +1000, Michael Ellerman wrote:
> Yihao Han <hanyihao@vivo.com> writes:
> > - if (index == 0 && (res->end - res->start) > 0xfff)
> > + if (index == 0 && (resource_size(res)) > 0xfff)
> > res->end = res->start + 0xfff;
> > - if (index == 1 && (res->end - res->start) > 0xff)
> > + if (index == 1 && (resource_size(res)) > 0xff)
>
> Are you sure the conversion is correct? It's not exactly equivalent:
>
> static inline resource_size_t resource_size(const struct resource *res)
> {
> return res->end - res->start + 1;
> }
Indeed. I pointed out this issue in the v2 that already hit my inbox.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
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2022-04-14 14:02 [PATCH] macintosh: macio_asic: fix resource_size.cocci warnings Yihao Han
2022-04-19 7:54 ` Uwe Kleine-König
2022-04-22 6:44 ` Michael Ellerman
2022-04-25 17:23 ` Uwe Kleine-König
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