linux-next: manual merge of the dmaengine tree with Linus' tree

linux-next: manual merge of the dmaengine tree with Linus' tree

[Stephen Rothwell]

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Hi all,

Today's linux-next merge of the dmaengine tree got a conflict in:

  drivers/dma/idxd/device.c

between commit:

  1cd8e751d96c ("dmaengine: idxd: skip clearing device context when device is read-only")

from Linus' tree and commit:

  cf4ac3fef338 ("dmaengine: idxd: fix lockdep warning on device driver removal")

from the dmaengine tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/dma/idxd/device.c
index f652da6ab47d,1143886f4a80..000000000000
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@@ -699,21 -716,23 +716,26 @@@ static void idxd_device_wqs_clear_state
  		struct idxd_wq *wq = idxd->wqs[i];
  
  		if (wq->state == IDXD_WQ_ENABLED) {
+ 			mutex_lock(&wq->wq_lock);
  			idxd_wq_disable_cleanup(wq);
 -			idxd_wq_device_reset_cleanup(wq);
  			wq->state = IDXD_WQ_DISABLED;
+ 			mutex_unlock(&wq->wq_lock);
  		}
 +		idxd_wq_device_reset_cleanup(wq);
  	}
  }
  
  void idxd_device_clear_state(struct idxd_device *idxd)
  {
 +	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
 +		return;
 +
+ 	idxd_device_wqs_clear_state(idxd);
+ 	spin_lock(&idxd->dev_lock);
  	idxd_groups_clear_state(idxd);
  	idxd_engines_clear_state(idxd);
- 	idxd_device_wqs_clear_state(idxd);
+ 	idxd->state = IDXD_DEV_DISABLED;
+ 	spin_unlock(&idxd->dev_lock);
  }
  
  static void idxd_group_config_write(struct idxd_group *group)

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Re: linux-next: manual merge of the dmaengine tree with Linus' tree

[Vinod Koul]

On 17-05-22, 15:34, Stephen Rothwell wrote:
> Hi all,
> 
> Today's linux-next merge of the dmaengine tree got a conflict in:
> 
>   drivers/dma/idxd/device.c
> 
> between commit:
> 
>   1cd8e751d96c ("dmaengine: idxd: skip clearing device context when device is read-only")
> 
> from Linus' tree and commit:
> 
>   cf4ac3fef338 ("dmaengine: idxd: fix lockdep warning on device driver removal")

Thank you Stephen, the merge looks right to me. Dave pls verify and test
-next

> 
> from the dmaengine tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc drivers/dma/idxd/device.c
> index f652da6ab47d,1143886f4a80..000000000000
> --- a/drivers/dma/idxd/device.c
> +++ b/drivers/dma/idxd/device.c
> @@@ -699,21 -716,23 +716,26 @@@ static void idxd_device_wqs_clear_state
>   		struct idxd_wq *wq = idxd->wqs[i];
>   
>   		if (wq->state == IDXD_WQ_ENABLED) {
> + 			mutex_lock(&wq->wq_lock);
>   			idxd_wq_disable_cleanup(wq);
>  -			idxd_wq_device_reset_cleanup(wq);
>   			wq->state = IDXD_WQ_DISABLED;
> + 			mutex_unlock(&wq->wq_lock);
>   		}
>  +		idxd_wq_device_reset_cleanup(wq);
>   	}
>   }
>   
>   void idxd_device_clear_state(struct idxd_device *idxd)
>   {
>  +	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
>  +		return;
>  +
> + 	idxd_device_wqs_clear_state(idxd);
> + 	spin_lock(&idxd->dev_lock);
>   	idxd_groups_clear_state(idxd);
>   	idxd_engines_clear_state(idxd);
> - 	idxd_device_wqs_clear_state(idxd);
> + 	idxd->state = IDXD_DEV_DISABLED;
> + 	spin_unlock(&idxd->dev_lock);
>   }
>   
>   static void idxd_group_config_write(struct idxd_group *group)



-- 
~Vinod

Re: linux-next: manual merge of the dmaengine tree with Linus' tree

[Dave Jiang]

On 5/18/2022 4:46 AM, Vinod Koul wrote:
> On 17-05-22, 15:34, Stephen Rothwell wrote:
>> Hi all,
>>
>> Today's linux-next merge of the dmaengine tree got a conflict in:
>>
>>    drivers/dma/idxd/device.c
>>
>> between commit:
>>
>>    1cd8e751d96c ("dmaengine: idxd: skip clearing device context when device is read-only")
>>
>> from Linus' tree and commit:
>>
>>    cf4ac3fef338 ("dmaengine: idxd: fix lockdep warning on device driver removal")
> Thank you Stephen, the merge looks right to me. Dave pls verify and test
> -next
>
>> from the dmaengine tree.
>>
>> I fixed it up (see below) and can carry the fix as necessary. This
>> is now fixed as far as linux-next is concerned, but any non trivial
>> conflicts should be mentioned to your upstream maintainer when your tree
>> is submitted for merging.  You may also want to consider cooperating
>> with the maintainer of the conflicting tree to minimise any particularly
>> complex conflicts.
>>
>> -- 
>> Cheers,
>> Stephen Rothwell
>>
>> diff --cc drivers/dma/idxd/device.c
>> index f652da6ab47d,1143886f4a80..000000000000
>> --- a/drivers/dma/idxd/device.c
>> +++ b/drivers/dma/idxd/device.c
>> @@@ -699,21 -716,23 +716,26 @@@ static void idxd_device_wqs_clear_state
>>    		struct idxd_wq *wq = idxd->wqs[i];
>>    
>>    		if (wq->state == IDXD_WQ_ENABLED) {
>> + 			mutex_lock(&wq->wq_lock);
>>    			idxd_wq_disable_cleanup(wq);
>>   -			idxd_wq_device_reset_cleanup(wq);
>>    			wq->state = IDXD_WQ_DISABLED;
>> + 			mutex_unlock(&wq->wq_lock);
>>    		}
>>   +		idxd_wq_device_reset_cleanup(wq);


The lock needs to go around both functions, we can move it outside the 
if().

  + 		mutex_lock(&wq->wq_lock);
   		if (wq->state == IDXD_WQ_ENABLED) {
   			idxd_wq_disable_cleanup(wq);
  -			idxd_wq_device_reset_cleanup(wq);
   			wq->state = IDXD_WQ_DISABLED;
   		}
  +		idxd_wq_device_reset_cleanup(wq);
  + 		mutex_unlock(&wq->wq_lock);


>>    	}
>>    }
>>    
>>    void idxd_device_clear_state(struct idxd_device *idxd)
>>    {
>>   +	if (!test_bit(IDXD_FLAG_CONFIGURABLE, &idxd->flags))
>>   +		return;
>>   +
>> + 	idxd_device_wqs_clear_state(idxd);
>> + 	spin_lock(&idxd->dev_lock);
>>    	idxd_groups_clear_state(idxd);
>>    	idxd_engines_clear_state(idxd);
>> - 	idxd_device_wqs_clear_state(idxd);
>> + 	idxd->state = IDXD_DEV_DISABLED;
>> + 	spin_unlock(&idxd->dev_lock);
>>    }
>>    
>>    static void idxd_group_config_write(struct idxd_group *group)
>
>

Re: linux-next: manual merge of the dmaengine tree with Linus' tree

[Stephen Rothwell]

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Hi Dave,

On Wed, 18 May 2022 10:20:59 -0700 Dave Jiang <dave.jiang@intel.com> wrote:
>
> The lock needs to go around both functions, we can move it outside the if().
> 
>   + 		mutex_lock(&wq->wq_lock);
>    		if (wq->state == IDXD_WQ_ENABLED) {
>    			idxd_wq_disable_cleanup(wq);
>   -			idxd_wq_device_reset_cleanup(wq);
>    			wq->state = IDXD_WQ_DISABLED;
>    		}
>   +		idxd_wq_device_reset_cleanup(wq);
>   + 		mutex_unlock(&wq->wq_lock);

Thanks for checking.  I have made that change to my merge resolution.
-- 
Cheers,
Stephen Rothwell

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Re: linux-next: manual merge of the dmaengine tree with Linus' tree

[Dave Jiang]

On 5/18/2022 3:40 PM, Stephen Rothwell wrote:
> Hi Dave,
>
> On Wed, 18 May 2022 10:20:59 -0700 Dave Jiang <dave.jiang@intel.com> wrote:
>> The lock needs to go around both functions, we can move it outside the if().
>>
>>    + 		mutex_lock(&wq->wq_lock);
>>     		if (wq->state == IDXD_WQ_ENABLED) {
>>     			idxd_wq_disable_cleanup(wq);
>>    -			idxd_wq_device_reset_cleanup(wq);
>>     			wq->state = IDXD_WQ_DISABLED;
>>     		}
>>    +		idxd_wq_device_reset_cleanup(wq);
>>    + 		mutex_unlock(&wq->wq_lock);
> Thanks for checking.  I have made that change to my merge resolution.
Thank you!

Re: linux-next: manual merge of the dmaengine tree with Linus' tree

[Vinod Koul]

On 22-08-23, 15:13, Stephen Rothwell wrote:
> Hi all,
> 
> Today's linux-next merge of the dmaengine tree got a conflict in:
> 
>   drivers/dma/mcf-edma.c
> 
> between commit:
> 
>   0a46781c89de ("dmaengine: mcf-edma: Fix a potential un-allocated memory access")
> 
> from Linus' tree and commit:
> 
>   923b13838892 ("dmaengine: mcf-edma: Use struct_size()")
> 
> from the dmaengine tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.

Thanks for the merge, it lgtm


> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc drivers/dma/mcf-edma.c
> index 9413fad08a60,28304dd8763a..000000000000
> --- a/drivers/dma/mcf-edma.c
> +++ b/drivers/dma/mcf-edma.c
> @@@ -190,15 -189,9 +189,15 @@@ static int mcf_edma_probe(struct platfo
>   		return -EINVAL;
>   	}
>   
>  -	chans = pdata->dma_channels;
>  +	if (!pdata->dma_channels) {
>  +		dev_info(&pdev->dev, "setting default channel number to 64");
>  +		chans = 64;
>  +	} else {
>  +		chans = pdata->dma_channels;
>  +	}
>  +
> - 	len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans;
> - 	mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
> + 	mcf_edma = devm_kzalloc(&pdev->dev, struct_size(mcf_edma, chans, chans),
> + 				GFP_KERNEL);
>   	if (!mcf_edma)
>   		return -ENOMEM;
>   



-- 
~Vinod

linux-next: manual merge of the dmaengine tree with Linus' tree

[Stephen Rothwell]

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Hi all,

Today's linux-next merge of the dmaengine tree got a conflict in:

  drivers/dma/mcf-edma.c

between commit:

  0a46781c89de ("dmaengine: mcf-edma: Fix a potential un-allocated memory access")

from Linus' tree and commit:

  923b13838892 ("dmaengine: mcf-edma: Use struct_size()")

from the dmaengine tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc drivers/dma/mcf-edma.c
index 9413fad08a60,28304dd8763a..000000000000
--- a/drivers/dma/mcf-edma.c
+++ b/drivers/dma/mcf-edma.c
@@@ -190,15 -189,9 +189,15 @@@ static int mcf_edma_probe(struct platfo
  		return -EINVAL;
  	}
  
 -	chans = pdata->dma_channels;
 +	if (!pdata->dma_channels) {
 +		dev_info(&pdev->dev, "setting default channel number to 64");
 +		chans = 64;
 +	} else {
 +		chans = pdata->dma_channels;
 +	}
 +
- 	len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans;
- 	mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ 	mcf_edma = devm_kzalloc(&pdev->dev, struct_size(mcf_edma, chans, chans),
+ 				GFP_KERNEL);
  	if (!mcf_edma)
  		return -ENOMEM;
  

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