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linux-sg2042
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libata fixes for sparse-found problems 

In pata_legacy and pata_winbond we've got bugs - cpu_to_le16() instead
of cpu_to_le32().  Fortunately, both affected suckers are VLB, thus
l-e-only, so we might get away with that unless we hit it with slop == 3
(hadn't checked if playing with badly aligned sg could trigger that).
Still buggy...  Moreover, pata_legacy, pata_winbond and pata_qdi forgot to
initialize pad on the write side of 32bit case in their ->data_xfer().
Hopefully the hardware does't care, but still, sending uninitialized
data to it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Al Viro 2008-01-12 14:16:14 +00:00 committed by Jeff Garzik
parent 38ad9aebe7
commit b50e56d81e
3 changed files with 9 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/ata/pata_legacy.c
View File

@ -271,14 +271,12 @@ static void pdc_data_xfer_vlb(struct ata_device *adev, unsigned char *buf, unsig
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad = 0;
if (write_data) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le16(pad);
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
}
}

8
drivers/ata/pata_qdi.c
View File

@ -136,14 +136,12 @@ static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad = 0;
if (write_data) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le32(pad);
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
}
}

8
drivers/ata/pata_winbond.c
View File

@ -104,14 +104,12 @@ static void winbond_data_xfer(struct ata_device *adev, unsigned char *buf, unsig
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
if (unlikely(slop)) {
u32 pad;
__le32 pad = 0;
if (write_data) {
memcpy(&pad, buf + buflen - slop, slop);
pad = le32_to_cpu(pad);
iowrite32(pad, ap->ioaddr.data_addr);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
} else {
pad = ioread32(ap->ioaddr.data_addr);
pad = cpu_to_le16(pad);
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
}
}