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33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
* rename the offset definition to avoid abiguity with the standard ATA
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IO address
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* read and write four bytes at once like the original driver does
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* use writesl() and readsl() which implicitly iterate over the data
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This patch assumes buflen to be a multiple of four, which is true for
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ATA devices. ATAPI support is not known, though unlikely, as the
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original driver always transfers 512 Bytes at once.
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Signed-off-by: Phil Sutter <n0-1@freewrt.org>
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Acked-by: Sergei Shtyltov <sshtylyov@ru.mvista.com>
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---
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--- a/drivers/ata/pata_rb532_cf.c
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+++ b/drivers/ata/pata_rb532_cf.c
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@@ -82,13 +82,10 @@ static unsigned int rb532_pata_data_xfer
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void __iomem *ioaddr = ap->ioaddr.data_addr;
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int retlen = buflen;
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- if (write_data) {
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- for (; buflen > 0; buflen--, buf++)
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- writeb(*buf, ioaddr);
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- } else {
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- for (; buflen > 0; buflen--, buf++)
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- *buf = readb(ioaddr);
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- }
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+ if (write_data)
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+ writesl(ioaddr, buf, buflen / sizeof(u32));
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+ else
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+ readsl(ioaddr, buf, buflen / sizeof(u32));
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rb532_pata_finish_io(adev->link->ap);
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return retlen;
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