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uwb: wlp: refactor wlp_get_<attribute>() macros 

Refactor the wlp_get_<attribute>() macros to call a common function.
This save over 4k of space and remove a spurious uninitialized variable
warning with some versions of gcc.

Signed-off-by: David Vrabel <david.vrabel@csr.com>
This commit is contained in:
David Vrabel 2010-01-11 13:46:31 +00:00
parent 2c1f1895ef
commit 145434bee4
1 changed files with 61 additions and 45 deletions
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106
drivers/uwb/wlp/messages.c
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@ -259,6 +259,63 @@ static int wlp_check_wss_info_attr_hdr(struct wlp *wlp,
}
static ssize_t wlp_get_attribute(struct wlp *wlp, u16 type_code,
struct wlp_attr_hdr *attr_hdr, void *value, ssize_t value_len,
ssize_t buflen)
{
struct device *dev = &wlp->rc->uwb_dev.dev;
ssize_t attr_len = sizeof(*attr_hdr) + value_len;
if (buflen < 0)
return -EINVAL;
if (buflen < attr_len) {
dev_err(dev, "WLP: Not enough space in buffer to parse"
" attribute field. Need %d, received %zu\n",
(int)attr_len, buflen);
return -EIO;
}
if (wlp_check_attr_hdr(wlp, attr_hdr, type_code, value_len) < 0) {
dev_err(dev, "WLP: Header verification failed. \n");
return -EINVAL;
}
memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), value_len);
return attr_len;
}
static ssize_t wlp_vget_attribute(struct wlp *wlp, u16 type_code,
struct wlp_attr_hdr *attr_hdr, void *value, ssize_t max_value_len,
ssize_t buflen)
{
struct device *dev = &wlp->rc->uwb_dev.dev;
size_t len;
if (buflen < 0)
return -EINVAL;
if (buflen < sizeof(*attr_hdr)) {
dev_err(dev, "WLP: Not enough space in buffer to parse"
" header.\n");
return -EIO;
}
if (le16_to_cpu(attr_hdr->type) != type_code) {
dev_err(dev, "WLP: Unexpected attribute type. Got %u, "
"expected %u.\n", le16_to_cpu(attr_hdr->type),
type_code);
return -EINVAL;
}
len = le16_to_cpu(attr_hdr->length);
if (len > max_value_len) {
dev_err(dev, "WLP: Attribute larger than maximum "
"allowed. Received %zu, max is %d.\n", len,
(int)max_value_len);
return -EFBIG;
}
if (buflen < sizeof(*attr_hdr) + len) {
dev_err(dev, "WLP: Not enough space in buffer to parse "
"variable data.\n");
return -EIO;
}
memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), len);
return sizeof(*attr_hdr) + len;
}
/**
* Get value of attribute from fixed size attribute field.
*
@ -274,22 +331,8 @@ static int wlp_check_wss_info_attr_hdr(struct wlp *wlp,
ssize_t wlp_get_##name(struct wlp *wlp, struct wlp_attr_##name *attr, \
type *value, ssize_t buflen) \
{ \
struct device *dev = &wlp->rc->uwb_dev.dev; \
if (buflen < 0) \
return -EINVAL; \
if (buflen < sizeof(*attr)) { \
dev_err(dev, "WLP: Not enough space in buffer to parse" \
" attribute field. Need %d, received %zu\n", \
(int)sizeof(*attr), buflen); \
return -EIO; \
} \
if (wlp_check_attr_hdr(wlp, &attr->hdr, type_code, \
sizeof(attr->name)) < 0) { \
dev_err(dev, "WLP: Header verification failed. \n"); \
return -EINVAL; \
} \
*value = attr->name; \
return sizeof(*attr); \
return wlp_get_attribute(wlp, (type_code), &attr->hdr, \
value, sizeof(*value), buflen); \
}
#define wlp_get_sparse(type, type_code, name) \
@ -313,35 +356,8 @@ static ssize_t wlp_get_##name(struct wlp *wlp, \
struct wlp_attr_##name *attr, \
type_val *value, ssize_t buflen) \
{ \
struct device *dev = &wlp->rc->uwb_dev.dev; \
size_t len; \
if (buflen < 0) \
return -EINVAL; \
if (buflen < sizeof(*attr)) { \
dev_err(dev, "WLP: Not enough space in buffer to parse" \
" header.\n"); \
return -EIO; \
} \
if (le16_to_cpu(attr->hdr.type) != type_code) { \
dev_err(dev, "WLP: Unexpected attribute type. Got %u, " \
"expected %u.\n", le16_to_cpu(attr->hdr.type), \
type_code); \
return -EINVAL; \
} \
len = le16_to_cpu(attr->hdr.length); \
if (len > max) { \
dev_err(dev, "WLP: Attribute larger than maximum " \
"allowed. Received %zu, max is %d.\n", len, \
(int)max); \
return -EFBIG; \
} \
if (buflen < sizeof(*attr) + len) { \
dev_err(dev, "WLP: Not enough space in buffer to parse "\
"variable data.\n"); \
return -EIO; \
} \
memcpy(value, (void *) attr + sizeof(*attr), len); \
return sizeof(*attr) + len; \
return wlp_vget_attribute(wlp, (type_code), &attr->hdr, \
value, (max), buflen); \
}
wlp_get(u8, WLP_ATTR_WLP_VER, version)