diff mbox

[1/8] OMAP: hwmod: Fix the addr spaces count API.

Message ID 1315459327-3285-2-git-send-email-santosh.shilimkar@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Santosh Shilimkar Sept. 8, 2011, 5:22 a.m. UTC 
From: sricharan <r.sricharan@ti.com>

The address space count API returns the number of address space
entries for a hwmod including a additional null value present in the
address space structure introduced recently. The devices which
have multiple hwmods and use device_build_ss are broken with this,
as their address resources are populated with a extra null value,
subsequently the probe fails. So fix the API not to add the null value.

Signed-off-by: sricharan <r.sricharan@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@ti.com>
---
 arch/arm/mach-omap2/omap_hwmod.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

Comments

Benoit Cousson Sept. 8, 2011, 7:47 a.m. UTC | #1 
Hi Sricharan,

On 9/8/2011 7:22 AM, Shilimkar, Santosh wrote:
> From: sricharan<r.sricharan@ti.com>
>
> The address space count API returns the number of address space
> entries for a hwmod including a additional null value present in the
> address space structure introduced recently.

That's a minor nit, but you might give the commit you are referencing here.

> The devices which
> have multiple hwmods and use device_build_ss are broken with this,
> as their address resources are populated with a extra null value,
> subsequently the probe fails. So fix the API not to add the null value.

It seems that in every cases, we are adding an extra null resource for 
nothing. But it is true that will not crash if the driver is just 
expecting an unique entry.
What is happening with multiple hwmods is probably the introduction of 
that extra null resource in the middle of the real ones, hence shifting 
the resource index?
You might give more details here.

> Signed-off-by: sricharan<r.sricharan@ti.com>
> Signed-off-by: Santosh Shilimkar<santosh.shilimkar@ti.com>
> Cc: Benoit Cousson<b-cousson@ti.com>
> Cc: Paul Walmsley<paul@pwsan.com>
> Cc: Kevin Hilman<khilman@ti.com>
> ---
>   arch/arm/mach-omap2/omap_hwmod.c |    8 +++++---
>   1 files changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
> index 84cc0bd..32a0f48a 100644
> --- a/arch/arm/mach-omap2/omap_hwmod.c
> +++ b/arch/arm/mach-omap2/omap_hwmod.c
> @@ -791,9 +791,11 @@ static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os)
>   	if (!os || !os->addr)
>   		return 0;
>
> -	do {
> -		mem =&os->addr[i++];
> -	} while (mem->pa_start != mem->pa_end);
> +	mem =&os->addr[i];
> +
> +	while (mem->pa_start != mem->pa_end) {
> +		mem =&os->addr[++i];
> +	};
>
>   	return i;

Cannot you just do "return i - 1"?

Regards,
Benoit
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diff mbox

Patch

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 84cc0bd..32a0f48a 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -791,9 +791,11 @@  static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os)
 	if (!os || !os->addr)
 		return 0;
 
-	do {
-		mem = &os->addr[i++];
-	} while (mem->pa_start != mem->pa_end);
+	mem = &os->addr[i];
+
+	while (mem->pa_start != mem->pa_end) {
+		mem = &os->addr[++i];
+	};
 
 	return i;
 }