openwrtv3/target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch
Florian Fainelli 499fa7f7a1 add 2.6.28 patches and kernel config
SVN-Revision: 14884
2009-03-15 12:56:39 +00:00

33 lines
1.2 KiB
Diff

* rename the offset definition to avoid abiguity with the standard ATA
IO address
* read and write four bytes at once like the original driver does
* use writesl() and readsl() which implicitly iterate over the data
This patch assumes buflen to be a multiple of four, which is true for
ATA devices. ATAPI support is not known, though unlikely, as the
original driver always transfers 512 Bytes at once.
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Acked-by: Sergei Shtyltov <sshtylyov@ru.mvista.com>
---
diff -urN linux-2.6.28.7/drivers/ata/pata_rb532_cf.c linux-2.6.28.7.new/drivers/ata/pata_rb532_cf.c
--- linux-2.6.28.7/drivers/ata/pata_rb532_cf.c 2009-03-15 13:24:24.000000000 +0100
+++ linux-2.6.28.7.new/drivers/ata/pata_rb532_cf.c 2009-03-15 13:26:19.000000000 +0100
@@ -82,13 +82,10 @@
void __iomem *ioaddr = ap->ioaddr.data_addr;
int retlen = buflen;
- if (write_data) {
- for (; buflen > 0; buflen--, buf++)
- writeb(*buf, ioaddr);
- } else {
- for (; buflen > 0; buflen--, buf++)
- *buf = readb(ioaddr);
- }
+ if (write_data)
+ writesl(ioaddr, buf, buflen / sizeof(u32));
+ else
+ readsl(ioaddr, buf, buflen / sizeof(u32));
rb532_pata_finish_io(adev->link->ap);
return retlen;