Re: SATA exceptions with 2.6.20-rc5

[Björn Steinbrink <B.Steinbrink@gmx.de>]

On 2007.01.21 13:58:01 -0600, Robert Hancock wrote:
> Björn Steinbrink wrote:
> >All kernels were bad using that approach. So back to square 1. :/
> >
> >Björn
> >
> 
> OK guys, here's a new patch to try against 2.6.20-rc5:
> 
> Right now when switching between ADMA mode and legacy mode (i.e. when 
> going from doing normal DMA reads/writes to doing a FLUSH CACHE) we just 
> set the ADMA GO register bit appropriately and continue with no delay. 
> It looks like in some cases the controller doesn't respond to this 
> immediately, it takes some nanoseconds for the controller's status 
> registers to reflect the change that was made. It's possible that if we 
> were trying to issue commands during this time, the controller might not 
> react properly. This patch adds some code to wait for the status 
> register to change to the state we asked for before continuing.

Just got two exceptions with your patch, none of the debug messages were
issued.

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