linux-kernel - Re: amd5536udc interrupts bug

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 8 Jan 2009 10:27:18 -0800
From:	Vadim Lobanov <vlobanov@...akeasy.net>
To:	Thomas Dahlmann <dahlmann.thomas@...or.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: amd5536udc interrupts bug

On Thursday 08 January 2009 08:40:28 Thomas Dahlmann wrote:
> Ah, right. Thanks for your analysis! Never ran into this condition as on
> the Geode systems I had the IRQ is shared between UDC and 
UOC/OTG
> (both on the CS5536 chip) and UOC never fires interrupts while UDC
> driver is loaded as both drivers (UOC/OTG driver is not in the kernel 
yet)
> register each other which makes sure that interrupts are enabled
> after  udc_pci_probe().

Ok, I understand.

> I could provide a fix within the next weeks. Currently I move to another
> company and
> have no hardware to test it.

No worries. :) I can also test your patches on my board here, if it helps 
any.

> Maybe you want to try this. It should work to place the register init
> from udc_probe()
>
> /* udc csr registers base */
> dev->csr = dev->virt_addr + UDC_CSR_ADDR;
> /* dev registers base */
> dev->regs = dev->virt_addr + UDC_DEVCFG_ADDR;
> /* ep registers base */
> dev->ep_regs = dev->virt_addr + UDC_EPREGS_ADDR;
> /* fifo's base */
> dev->rxfifo = (u32 __iomem *)(dev->virt_addr + UDC_RXFIFO_ADDR);
> dev->txfifo = (u32 __iomem *)(dev->virt_addr + UDC_TXFIFO_ADDR);
>
> just before request_irq(...) to allow the interrupt handler to read the
> interrupt status
> registers.

I'll slip this into the next kernel build and see what happens. Thanks!

-- Vadim Lobanov

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/