Re: [PATCH V4 05/10] dmaengine: qcom_hidma: make pending_tre_count atomic

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 10/1/2016 2:19 AM, Vinod Koul wrote:
>> Making it atomic so that it can be updated from multiple contexts.
> How is it multiple contexts? It's either existing context of MSI, not both!
> 

I was trying to mean multiple processor contexts here. The driver allocates 11
MSI interrupts. Each MSI interrupt can be assigned to a different CPU. Then, 
we have a race condition for common variables as they share the same interrupt
handler with a different cause bit. 

I will put the above description into the commit text.

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux