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iwlwifi: dynamically allocate buffer for sram debugfs file

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Dynamically allocate memory for dumping SRAM based on the length of memory
to be displayed.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2009-11-20 12:05:00 -08:00 committed by John W. Linville
parent d23db55681
commit 2943f136ff
1 changed files with 13 additions and 2 deletions
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15
drivers/net/wireless/iwlwifi/iwl-debugfs.c
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@ -228,13 +228,21 @@ static ssize_t iwl_dbgfs_sram_read(struct file *file,
size_t count, loff_t *ppos) size_t count, loff_t *ppos)
{ {
u32 val; u32 val;
char buf[1024]; char *buf;
ssize_t ret; ssize_t ret;
int i; int i;
int pos = 0; int pos = 0;
struct iwl_priv *priv = (struct iwl_priv *)file->private_data; struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
const size_t bufsz = sizeof(buf); size_t bufsz;
bufsz = 30 + priv->dbgfs->sram_len * sizeof(char) * 12;
buf = kmalloc(bufsz, GFP_KERNEL);
if (!buf)
return -ENOMEM;
pos += scnprintf(buf + pos, bufsz - pos, "sram_len: %d\n",
priv->dbgfs->sram_len);
pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: %d\n",
priv->dbgfs->sram_offset);
for (i = priv->dbgfs->sram_len; i > 0; i -= 4) { for (i = priv->dbgfs->sram_len; i > 0; i -= 4) {
val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \ val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \
priv->dbgfs->sram_len - i); priv->dbgfs->sram_len - i);
@ -251,11 +259,14 @@ static ssize_t iwl_dbgfs_sram_read(struct file *file,
break; break;
} }
} }
if (!(i % 16))
pos += scnprintf(buf + pos, bufsz - pos, "\n");
pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val); pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val);
} }
pos += scnprintf(buf + pos, bufsz - pos, "\n"); pos += scnprintf(buf + pos, bufsz - pos, "\n");
ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
kfree(buf);
return ret; return ret;
} }