Alan Cox wrote:
On Wed, 26 Sep 2007 10:33:28 -0400
Jeff Garzik <[email protected]> wrote:
Alan Cox wrote:
NAK - mmio is an iomap so writel and readl are the wrong things to use
The patch is consistent with the rest of the driver.
You are welcome to submit a patch to convert ahci to using ioremap.
You could just flip the relevant function to use ioread while you are
tidying it up, instead of spreading new bugs into the code.
No, as I just noted above, the proper fix for this driver is to use
ioremap rather than pci_iomap.
Adding support to ahci for legacy PIO is completely pointless.
iomap isn't just for legacy PIO. It allows us to handle future weird
mappings in ways ioremap cannot.
Well, when needs dictate, we can re-evaluate.
Until some future date arrives where it matters for all these MMIO-only
drivers and hardware, it's just a bunch of pointless overhead for ahci
and many other drivers. It's also just not the Linux way to punish
everybody for some edge case that so far only exists in email conversations.
The beauty of libata is that you don't have to enforce such a pogrom
across all libata drivers. The libata high level API is completely free
from ioread/iowrite junk, leaving each driver to make its own decision.
Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
