diff options
Diffstat (limited to 'target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch')
| -rw-r--r-- | target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch b/target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch new file mode 100644 index 0000000000..1af14ad6f0 --- /dev/null +++ b/target/linux/rb532/patches-2.6.28/005-pata_rb532_cf_4bytes_rw.patch @@ -0,0 +1,33 @@ +* 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; |