summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/orinoco
diff options
context:
space:
mode:
authorDan Carpenter <dan.carpenter@oracle.com>2012-10-02 11:32:34 +0300
committerJohn W. Linville <linville@tuxdriver.com>2012-10-19 15:53:04 -0400
commit264e989a0b347c61bd3258063eac8b86f55ff037 (patch)
treee874e2c843d2ef13f26c67448c62181620557f2f /drivers/net/wireless/orinoco
parent2b4766c3008aa99a60415a6f321ac0dad94852f1 (diff)
orinoco_usb: clean up some signedness issues
In ezusb_read_ltv() we had a comparison "(bufsize < 0)" which was never true because bufsize was unsigned. I looked at the implications of that. If we passed a negative number to ezusb_access_ltv() then it would be used as the size parameter of the memcpy() because that function uses min_t(int, exp_len, ans_size). But fortunately when I looked at the callers, bufsize is not controlled by the user and it's never negative. So these signedness mistakes have no impact. I removed the always false check from ezusb_read_ltv() and I changed the types in ezusb_access_ltv() and made the variables unsigned. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/orinoco')
-rw-r--r--drivers/net/wireless/orinoco/orinoco_usb.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/net/wireless/orinoco/orinoco_usb.c b/drivers/net/wireless/orinoco/orinoco_usb.c
index 7f53cea2f205..01624dcaf73e 100644
--- a/drivers/net/wireless/orinoco/orinoco_usb.c
+++ b/drivers/net/wireless/orinoco/orinoco_usb.c
@@ -865,7 +865,7 @@ static int ezusb_firmware_download(struct ezusb_priv *upriv,
static int ezusb_access_ltv(struct ezusb_priv *upriv,
struct request_context *ctx,
u16 length, const void *data, u16 frame_type,
- void *ans_buff, int ans_size, u16 *ans_length)
+ void *ans_buff, unsigned ans_size, u16 *ans_length)
{
int req_size;
int retval = 0;
@@ -933,7 +933,7 @@ static int ezusb_access_ltv(struct ezusb_priv *upriv,
}
if (ctx->in_rid) {
struct ezusb_packet *ans = ctx->buf;
- int exp_len;
+ unsigned exp_len;
if (ans->hermes_len != 0)
exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
@@ -949,8 +949,7 @@ static int ezusb_access_ltv(struct ezusb_priv *upriv,
}
if (ans_buff)
- memcpy(ans_buff, ans->data,
- min_t(int, exp_len, ans_size));
+ memcpy(ans_buff, ans->data, min(exp_len, ans_size));
if (ans_length)
*ans_length = le16_to_cpu(ans->hermes_len);
}
@@ -995,7 +994,7 @@ static int ezusb_read_ltv(struct hermes *hw, int bap, u16 rid,
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
- if ((bufsize < 0) || (bufsize % 2))
+ if (bufsize % 2)
return -EINVAL;
ctx = ezusb_alloc_ctx(upriv, rid, rid);