lkml.org 
[lkml]   [2006]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Areca RAID driver remaining items?
From
Date
On Thu, 2006-02-23 at 17:50 +0800, erich wrote:
> Dear Arjan van de Ven,
>
> The following contex is coming from comment of Christoph Hellwig.
>
> - msi should be a module options if at all, but defintitly not
> a config options
>
> #ifdef CONFIG_SCSI_ARCMSR_MSI
> if (!pci_enable_msi(pci_device))
> pACB->acb_flags |= ACB_F_HAVE_MSI;
> #endif
>
> I make an option config for prevent some mainboards hang up if arcmsr enable
> msi function.
> Areca RAID controller is bridged hardware.
> There were a lots of mainboards had wrong IRQ routing table issue with it.
> If somebody meet this issue and people can enable msi function to fix its
> hardware bug.
> But unfortunately I found some mainboards will hang up if I always enable
> this function in my lab.
> To avoid this issue, I do an option for this case.


yes the reason for making this optional is clear, and Christoph also
understands that.

However the idea that Christoph is proposing is to not make it a compile
time option, but a runtime option. Compile-time is not very flexible,
especially not for linux distributions. Making it a module option means
it becomes runtime behavior, and the user can load the module like

modprobe aerca msi=0

and msi gets turned off. No need to recompile anything! That has many
advantages over a more inflexible (from the user view) compiletime-only
option.


-
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/

\
 
 \ /
  Last update: 2006-02-23 10:58    [W:0.164 / U:0.676 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site