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>

diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 7bed8d806381eb45b83f6d47c91ddfaf7c754f90..17159b5e1e43d4d48b17aa76568bb77247499b58 100644 (file)
--- 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 7d4c696c4cb6b8cb5ccaa86a6ed893856ae3497f..a4c0e502cb42759547332f1cee304bc5e95f9cb8 100644 (file)
--- 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 311cdb3a5566caec1d60e788327f3004fc662b8d..7116a9e7a8b27ab9e887fdfe503a9ecd2f6963eb 100644 (file)
--- 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);
                        }
                }