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rtlwifi: Move 2 large arrays off stack

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In driver rtlwifi, efuse_read() places two relatively large arrays on the
stack - a 1D u8 array of size 128, and a 2D array of u16 with 128 * 4 elements.
With driver rtl8192de, the sizes will be 256 and 256 * 4 respectively. As that
will make the 2D array be 2048 bytes, I have changed the code to use kmalloc to
allocate the space.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2011-05-06 13:56:18 -05:00 committed by John W. Linville
parent 054ec92494
commit c84aa5af99
1 changed files with 28 additions and 7 deletions
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35
drivers/net/wireless/rtlwifi/efuse.c
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@ -235,7 +235,7 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
u8 efuse_tbl[HWSET_MAX_SIZE];
u8 *efuse_tbl;
u8 rtemp8[1];
u16 efuse_addr = 0;
u8 offset, wren;
@ -245,7 +245,7 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
rtlpriv->cfg->maps[EFUSE_MAX_SECTION_MAP];
const u32 efuse_len =
rtlpriv->cfg->maps[EFUSE_REAL_CONTENT_SIZE];
u16 efuse_word[EFUSE_MAX_SECTION][EFUSE_MAX_WORD_UNIT];
u16 **efuse_word;
u16 efuse_utilized = 0;
u8 efuse_usage;
@ -256,9 +256,24 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
return;
}
/* allocate memory for efuse_tbl and efuse_word */
efuse_tbl = kmalloc(rtlpriv->cfg->maps[EFUSE_HWSET_MAX_SIZE] *
sizeof(u8), GFP_ATOMIC);
if (!efuse_tbl)
return;
efuse_word = kmalloc(EFUSE_MAX_WORD_UNIT * sizeof(u16 *), GFP_ATOMIC);
if (!efuse_word)
goto done;
for (i = 0; i < EFUSE_MAX_WORD_UNIT; i++) {
efuse_word[i] = kmalloc(efuse_max_section * sizeof(u16),
GFP_ATOMIC);
if (!efuse_word[i])
goto done;
}
for (i = 0; i < efuse_max_section; i++)
for (j = 0; j < EFUSE_MAX_WORD_UNIT; j++)
efuse_word[i][j] = 0xFFFF;
efuse_word[j][i] = 0xFFFF;
read_efuse_byte(hw, efuse_addr, rtemp8);
if (*rtemp8 != 0xFF) {
@ -285,7 +300,8 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
read_efuse_byte(hw, efuse_addr, rtemp8);
efuse_addr++;
efuse_utilized++;
efuse_word[offset][i] = (*rtemp8 & 0xff);
efuse_word[i][offset] =
(*rtemp8 & 0xff);
if (efuse_addr >= efuse_len)
break;
@ -297,7 +313,7 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
read_efuse_byte(hw, efuse_addr, rtemp8);
efuse_addr++;
efuse_utilized++;
efuse_word[offset][i] |=
efuse_word[i][offset] |=
(((u16)*rtemp8 << 8) & 0xff00);
if (efuse_addr >= efuse_len)
@ -320,9 +336,9 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
for (i = 0; i < efuse_max_section; i++) {
for (j = 0; j < EFUSE_MAX_WORD_UNIT; j++) {
efuse_tbl[(i * 8) + (j * 2)] =
(efuse_word[i][j] & 0xff);
(efuse_word[j][i] & 0xff);
efuse_tbl[(i * 8) + ((j * 2) + 1)] =
((efuse_word[i][j] >> 8) & 0xff);
((efuse_word[j][i] >> 8) & 0xff);
}
}
@ -336,6 +352,11 @@ void read_efuse(struct ieee80211_hw *hw, u16 _offset, u16 _size_byte, u8 *pbuf)
(u8 *)&efuse_utilized);
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_EFUSE_USAGE,
(u8 *)&efuse_usage);
done:
for (i = 0; i < EFUSE_MAX_WORD_UNIT; i++)
kfree(efuse_word[i]);
kfree(efuse_word);
kfree(efuse_tbl);
}
bool efuse_shadow_update_chk(struct ieee80211_hw *hw)