[PATCH] pata_legacy: fix a couple uninitialized variable bugs

Dan Carpenter
2021-10-06T07:34:53Z

The last byte of "pad" is used without being initialized.

Fixes: 55dba3120fbc ("libata: update ->data_xfer hook for ATAPI")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/ata/pata_legacy.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index c3e6592712c4..b53f0e09783d 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -352,7 +352,7 @@ static unsigned int pdc_data_xfer_vlb(struct ata_queued_cmd *qc,
iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

if (unlikely(slop)) {
- __le32 pad;
+ __le32 pad = 0;
if (rw == READ) {
pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
memcpy(buf + buflen - slop, &pad, slop);
@@ -742,7 +742,7 @@ static unsigned int vlb32_data_xfer(struct ata_queued_cmd *qc,
ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);

if (unlikely(slop)) {
- __le32 pad;
+ __le32 pad = 0;
if (rw == WRITE) {
memcpy(&pad, buf + buflen - slop, slop);
iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
--
2.20.1