[PATCH] iommu: of: Fix check for returning EPROBE_DEFER

[PATCH] iommu: of: Fix check for returning EPROBE_DEFER

[Sricharan R]

While returning EPROBE_DEFER for iommu masters
take in to account of iommu nodes that could be
marked in DT as 'status=disabled', in which case
simply return NULL and let the master's probe
continue rather than deferring.

Signed-off-by: Sricharan R <sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Tested-by: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
Acked-by: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
---
 drivers/iommu/of_iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 9f44ee8..e6e9bec 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -118,6 +118,7 @@ static bool of_iommu_driver_present(struct device_node *np)
 
 	ops = iommu_ops_from_fwnode(fwnode);
 	if ((ops && !ops->of_xlate) ||
+	    !of_device_is_available(iommu_spec->np) ||
 	    (!ops && !of_iommu_driver_present(iommu_spec->np)))
 		return NULL;
 
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH] iommu: of: Fix check for returning EPROBE_DEFER

[Jonathan Neuschäfer]

Hi, I have a few suggestions on how to make this commit message more
readable:

On Tue, May 16, 2017 at 10:54:13AM +0530, Sricharan R wrote:
> While returning EPROBE_DEFER for iommu masters

Add a comma at the end of this line

> take in to account of iommu nodes that could be

s/in to/into/
s/of iommu/of_iommu/

> marked in DT as 'status=disabled', in which case
> simply return NULL and let the master's probe
> continue rather than deferring.
> 
> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> Tested-by: Will Deacon <will.deacon@arm.com>
> Acked-by: Will Deacon <will.deacon@arm.com>


Thanks,
Jonathan Neuschäfer

Re: [PATCH] iommu: of: Fix check for returning EPROBE_DEFER

[Sricharan R]

Hi,

On 5/16/2017 7:39 PM, Jonathan Neuschäfer wrote:
> Hi, I have a few suggestions on how to make this commit message more
> readable:
> 
> On Tue, May 16, 2017 at 10:54:13AM +0530, Sricharan R wrote:
>> While returning EPROBE_DEFER for iommu masters
> 
> Add a comma at the end of this line
> 
>> take in to account of iommu nodes that could be
> 
> s/in to/into/
> s/of iommu/of_iommu/
> 

ok, will correct the above.

Regards,
 Sricharan

>> marked in DT as 'status=disabled', in which case
>> simply return NULL and let the master's probe
>> continue rather than deferring.
>>
>> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
>> Tested-by: Will Deacon <will.deacon@arm.com>
>> Acked-by: Will Deacon <will.deacon@arm.com>
> 
> 
> Thanks,
> Jonathan Neuschäfer
> 

-- 
"QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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