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path: root/drivers/net/wireless/libertas/debugfs.c
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Diffstat (limited to 'drivers/net/wireless/libertas/debugfs.c')
-rw-r--r--drivers/net/wireless/libertas/debugfs.c181
1 files changed, 64 insertions, 117 deletions
diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
index 26cbf1d..faed182 100644
--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c
@@ -56,19 +56,15 @@ static ssize_t lbs_sleepparams_write(struct file *file,
loff_t *ppos)
{
struct lbs_private *priv = file->private_data;
- ssize_t buf_size, ret;
+ ssize_t ret;
struct sleep_params sp;
int p1, p2, p3, p4, p5, p6;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(user_buf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, user_buf, buf_size)) {
- ret = -EFAULT;
- goto out_unlock;
- }
ret = sscanf(buf, "%d %d %d %d %d %d", &p1, &p2, &p3, &p4, &p5, &p6);
if (ret != 6) {
ret = -EINVAL;
@@ -88,7 +84,7 @@ static ssize_t lbs_sleepparams_write(struct file *file,
ret = -EINVAL;
out_unlock:
- free_page(addr);
+ kfree(buf);
return ret;
}
@@ -125,18 +121,14 @@ static ssize_t lbs_host_sleep_write(struct file *file,
loff_t *ppos)
{
struct lbs_private *priv = file->private_data;
- ssize_t buf_size, ret;
+ ssize_t ret;
int host_sleep;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(user_buf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, user_buf, buf_size)) {
- ret = -EFAULT;
- goto out_unlock;
- }
ret = sscanf(buf, "%d", &host_sleep);
if (ret != 1) {
ret = -EINVAL;
@@ -162,7 +154,7 @@ static ssize_t lbs_host_sleep_write(struct file *file,
ret = count;
out_unlock:
- free_page(addr);
+ kfree(buf);
return ret;
}
@@ -281,21 +273,15 @@ static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask,
struct cmd_ds_802_11_subscribe_event *events;
struct mrvl_ie_thresholds *tlv;
struct lbs_private *priv = file->private_data;
- ssize_t buf_size;
int value, freq, new_mask;
uint16_t curr_mask;
char *buf;
int ret;
- buf = (char *)get_zeroed_page(GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- ret = -EFAULT;
- goto out_page;
- }
ret = sscanf(buf, "%d %d %d", &value, &freq, &new_mask);
if (ret != 3) {
ret = -EINVAL;
@@ -343,7 +329,7 @@ static ssize_t lbs_threshold_write(uint16_t tlv_type, uint16_t event_mask,
out_events:
kfree(events);
out_page:
- free_page((unsigned long)buf);
+ kfree(buf);
return ret;
}
@@ -472,22 +458,15 @@ static ssize_t lbs_rdmac_write(struct file *file,
size_t count, loff_t *ppos)
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
priv->mac_offset = simple_strtoul(buf, NULL, 16);
- res = count;
-out_unlock:
- free_page(addr);
- return res;
+ kfree(buf);
+ return count;
}
static ssize_t lbs_wrmac_write(struct file *file,
@@ -496,18 +475,14 @@ static ssize_t lbs_wrmac_write(struct file *file,
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
+ ssize_t res;
u32 offset, value;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
res = sscanf(buf, "%x %x", &offset, &value);
if (res != 2) {
res = -EFAULT;
@@ -520,7 +495,7 @@ static ssize_t lbs_wrmac_write(struct file *file,
if (!res)
res = count;
out_unlock:
- free_page(addr);
+ kfree(buf);
return res;
}
@@ -554,22 +529,16 @@ static ssize_t lbs_rdbbp_write(struct file *file,
size_t count, loff_t *ppos)
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
priv->bbp_offset = simple_strtoul(buf, NULL, 16);
- res = count;
-out_unlock:
- free_page(addr);
- return res;
+ kfree(buf);
+
+ return count;
}
static ssize_t lbs_wrbbp_write(struct file *file,
@@ -578,18 +547,14 @@ static ssize_t lbs_wrbbp_write(struct file *file,
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
+ ssize_t res;
u32 offset, value;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
res = sscanf(buf, "%x %x", &offset, &value);
if (res != 2) {
res = -EFAULT;
@@ -602,7 +567,7 @@ static ssize_t lbs_wrbbp_write(struct file *file,
if (!res)
res = count;
out_unlock:
- free_page(addr);
+ kfree(buf);
return res;
}
@@ -636,22 +601,15 @@ static ssize_t lbs_rdrf_write(struct file *file,
size_t count, loff_t *ppos)
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
priv->rf_offset = simple_strtoul(buf, NULL, 16);
- res = count;
-out_unlock:
- free_page(addr);
- return res;
+ kfree(buf);
+ return count;
}
static ssize_t lbs_wrrf_write(struct file *file,
@@ -660,18 +618,14 @@ static ssize_t lbs_wrrf_write(struct file *file,
{
struct lbs_private *priv = file->private_data;
- ssize_t res, buf_size;
+ ssize_t res;
u32 offset, value;
- unsigned long addr = get_zeroed_page(GFP_KERNEL);
- char *buf = (char *)addr;
- if (!buf)
- return -ENOMEM;
+ char *buf;
+
+ buf = memdup_user_nul(userbuf, min(count, len - 1));
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
- buf_size = min(count, len - 1);
- if (copy_from_user(buf, userbuf, buf_size)) {
- res = -EFAULT;
- goto out_unlock;
- }
res = sscanf(buf, "%x %x", &offset, &value);
if (res != 2) {
res = -EFAULT;
@@ -684,7 +638,7 @@ static ssize_t lbs_wrrf_write(struct file *file,
if (!res)
res = count;
out_unlock:
- free_page(addr);
+ kfree(buf);
return res;
}
@@ -915,16 +869,9 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf,
if (cnt == 0)
return 0;
- pdata = kmalloc(cnt + 1, GFP_KERNEL);
- if (pdata == NULL)
- return 0;
-
- if (copy_from_user(pdata, buf, cnt)) {
- lbs_deb_debugfs("Copy from user failed\n");
- kfree(pdata);
- return 0;
- }
- pdata[cnt] = '\0';
+ pdata = memdup_user_nul(buf, cnt);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
p0 = pdata;
for (i = 0; i < num_of_items; i++) {
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