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authorAl Viro <viro@ZenIV.linux.org.uk>2008-01-12 14:16:14 +0000
committerJeff Garzik <jeff@garzik.org>2008-01-15 15:58:36 -0500
commitb50e56d81e0df964e9b28001d792021b109cf4f1 (patch)
treee76679a3230265d1484882fd914e1b7b208004ba
parent38ad9aebe70dc72df08851bbd1620d89329129ba (diff)
downloadlinux-stericsson-b50e56d81e0df964e9b28001d792021b109cf4f1.tar.gz
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>
-rw-r--r--drivers/ata/pata_legacy.c8
-rw-r--r--drivers/ata/pata_qdi.c8
-rw-r--r--drivers/ata/pata_winbond.c8
3 files changed, 9 insertions, 15 deletions
diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 7bed8d806381..17159b5e1e43 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -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);
}
}
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 7d4c696c4cb6..a4c0e502cb42 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -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);
}
}
diff --git a/drivers/ata/pata_winbond.c b/drivers/ata/pata_winbond.c
index 311cdb3a5566..7116a9e7a8b2 100644
--- a/drivers/ata/pata_winbond.c
+++ b/drivers/ata/pata_winbond.c
@@ -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);
}
}