Re: musb: Add workaround for AM35x advisory Advisory 1.1.20

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

On 03/14/2012 07:49 AM, Gupta, Ajay Kumar wrote:
I *think* that the DMA engine is performing some access on its own to
those registers behind the bridge which leads to the same read&  clear
interrupt race.

DMA driver (CPPI4.1) is not yet available for AM35x but DMA might read
Mentor core registers. The solution is to disable non-PDR interrupt in
CONTROL register (bit D3) at offset 0x0004.
"D3 | uint | USB non-PDR interrupt enable"

I see. Care to send a patch to replace my "force DMA off"?


To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at

B and H Foto and Electronics Corp.

[Linux Media]     [Video for Linux]     [Linux Input]     [Linux Audio Users]     [Photo]     [Yosemite News]    [Yosemite Photos]    [Free Online Dating]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]     [More Archives]

Add to Google Powered by Linux