PS3: gelic: Allocate the bounce buffer dynamically

Allocate the bouce buffer for the wireless command dynamically.

Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 33 insertions, 7 deletions

diff --git a/drivers/net/ps3_gelic_wireless.c b/drivers/net/ps3_gelic_wireless.c
index e5e02339a5cc..c16a30b28bf6 100644
--- a/drivers/net/ps3_gelic_wireless.c
+++ b/drivers/net/ps3_gelic_wireless.c
@@ -1524,15 +1524,20 @@ static struct iw_statistics *gelic_wl_get_wireless_stats(
         struct gelic_eurus_cmd *cmd;
         struct iw_statistics *is;
         struct gelic_eurus_rssi_info *rssi;
+        void *buf;
 
         pr_debug("%s: <-\n", __func__);
 
+        buf = (void *)__get_free_page(GFP_KERNEL);
+        if (!buf)
+                return NULL;
+
         is = &wl->iwstat;
         memset(is, 0, sizeof(*is));
         cmd = gelic_eurus_sync_cmd(wl, GELIC_EURUS_CMD_GET_RSSI_CFG,
-                                   wl->buf, sizeof(*rssi));
+                                   buf, sizeof(*rssi));
         if (cmd && !cmd->status && !cmd->cmd_status) {
-                rssi = wl->buf;
+                rssi = buf;
                 is->qual.level = be16_to_cpu(rssi->rssi);
                 is->qual.updated = IW_QUAL_LEVEL_UPDATED |
                         IW_QUAL_QUAL_INVALID | IW_QUAL_NOISE_INVALID;
@@ -1541,6 +1546,7 @@ static struct iw_statistics *gelic_wl_get_wireless_stats(
                 is->qual.updated = IW_QUAL_ALL_INVALID;
 
         kfree(cmd);
+        free_page((unsigned long)buf);
         pr_debug("%s: ->\n", __func__);
         return is;
 }
@@ -1607,11 +1613,18 @@ static void gelic_wl_scan_complete_event(struct gelic_wl_info *wl)
         union iwreq_data data;
         unsigned long this_time = jiffies;
         unsigned int data_len, i, found, r;
+        void *buf;
         DECLARE_MAC_BUF(mac);
 
         pr_debug("%s:start\n", __func__);
         mutex_lock(&wl->scan_lock);
 
+        buf = (void *)__get_free_page(GFP_KERNEL);
+        if (!buf) {
+                pr_info("%s: scan buffer alloc failed\n", __func__);
+                goto out;
+        }
+
         if (wl->scan_stat != GELIC_WL_SCAN_STAT_SCANNING) {
                 /*
                  * stop() may be called while scanning, ignore result
@@ -1622,7 +1635,7 @@ static void gelic_wl_scan_complete_event(struct gelic_wl_info *wl)
         }
 
         cmd = gelic_eurus_sync_cmd(wl, GELIC_EURUS_CMD_GET_SCAN,
-                                   wl->buf, PAGE_SIZE);
+                                   buf, PAGE_SIZE);
         if (!cmd || cmd->status || cmd->cmd_status) {
                 wl->scan_stat = GELIC_WL_SCAN_STAT_INIT;
                 pr_info("%s:cmd failed\n", __func__);
@@ -1649,7 +1662,7 @@ static void gelic_wl_scan_complete_event(struct gelic_wl_info *wl)
         }
 
         /* put them in the newtork_list */
-        for (i = 0, scan_info_size = 0, scan_info = wl->buf;
+        for (i = 0, scan_info_size = 0, scan_info = buf;
              scan_info_size < data_len;
              i++, scan_info_size += be16_to_cpu(scan_info->size),
              scan_info = (void *)scan_info + be16_to_cpu(scan_info->size)) {
@@ -1726,6 +1739,7 @@ static void gelic_wl_scan_complete_event(struct gelic_wl_info *wl)
         wireless_send_event(port_to_netdev(wl_port(wl)), SIOCGIWSCAN, &data,
                             NULL);
 out:
+        free_page((unsigned long)buf);
         complete(&wl->scan_done);
         mutex_unlock(&wl->scan_lock);
         pr_debug("%s:end\n", __func__);
@@ -1848,7 +1862,10 @@ static int gelic_wl_do_wep_setup(struct gelic_wl_info *wl)
 
         pr_debug("%s: <-\n", __func__);
         /* we can assume no one should uses the buffer */
-        wep = wl->buf;
+        wep = (struct gelic_eurus_wep_cfg *)__get_free_page(GFP_KERNEL);
+        if (!wep)
+                return -ENOMEM;
+
         memset(wep, 0, sizeof(*wep));
 
         if (wl->group_cipher_method == GELIC_WL_CIPHER_WEP) {
@@ -1898,6 +1915,7 @@ static int gelic_wl_do_wep_setup(struct gelic_wl_info *wl)
 
         kfree(cmd);
 out:
+        free_page((unsigned long)wep);
         pr_debug("%s: ->\n", __func__);
         return ret;
 }
@@ -1941,7 +1959,10 @@ static int gelic_wl_do_wpa_setup(struct gelic_wl_info *wl)
 
         pr_debug("%s: <-\n", __func__);
         /* we can assume no one should uses the buffer */
-        wpa = wl->buf;
+        wpa = (struct gelic_eurus_wpa_cfg *)__get_free_page(GFP_KERNEL);
+        if (!wpa)
+                return -ENOMEM;
+
         memset(wpa, 0, sizeof(*wpa));
 
         if (!test_bit(GELIC_WL_STAT_WPA_PSK_SET, &wl->stat))
@@ -2000,6 +2021,7 @@ static int gelic_wl_do_wpa_setup(struct gelic_wl_info *wl)
         else if (cmd->status || cmd->cmd_status)
                 ret = -ENXIO;
         kfree(cmd);
+        free_page((unsigned long)wpa);
         pr_debug("%s: --> %d\n", __func__, ret);
         return ret;
 }
@@ -2018,7 +2040,10 @@ static int gelic_wl_associate_bss(struct gelic_wl_info *wl,
         pr_debug("%s: <-\n", __func__);
 
         /* do common config */
-        common = wl->buf;
+        common = (struct gelic_eurus_common_cfg *)__get_free_page(GFP_KERNEL);
+        if (!common)
+                return -ENOMEM;
+
         memset(common, 0, sizeof(*common));
         common->bss_type = cpu_to_be16(GELIC_EURUS_BSS_INFRA);
         common->op_mode = cpu_to_be16(GELIC_EURUS_OPMODE_11BG);
@@ -2104,6 +2129,7 @@ static int gelic_wl_associate_bss(struct gelic_wl_info *wl,
                 pr_info("%s: connected\n", __func__);
         }
 out:
+        free_page((unsigned long)common);
         pr_debug("%s: ->\n", __func__);
         return ret;
 }