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Date: Sat, 17 Mar 2012 18:41:53 +0100
From: Mircea Gherzan <mgherzan@...il.com>
To: Luciano Coelho <coelho@...com>
Cc: Mircea Gherzan <mgherzan@...il.com>,
"John W. Linville" <linville@...driver.com>,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2] wl12xx: fix DMA-API-related warnings
On the PandaBoard (omap_hsmmc + wl12xx_sdio) with DMA_API_DEBUG:
WARNING: at lib/dma-debug.c:930 check_for_stack.part.8+0x7c/0xe0()
omap_hsmmc omap_hsmmc.4: DMA-API: device driver maps memory fromstack
Signed-off-by: Mircea Gherzan <mgherzan@...il.com>
---
drivers/net/wireless/wl12xx/boot.c | 14 +++++++++++---
drivers/net/wireless/wl12xx/cmd.c | 25 ++++++++++++++++---------
drivers/net/wireless/wl12xx/event.c | 10 +++++-----
drivers/net/wireless/wl12xx/event.h | 2 ++
drivers/net/wireless/wl12xx/main.c | 9 +++++++++
drivers/net/wireless/wl12xx/wl12xx.h | 3 +++
6 files changed, 46 insertions(+), 17 deletions(-)
diff --git a/drivers/net/wireless/wl12xx/boot.c b/drivers/net/wireless/wl12xx/boot.c
index 8f9cf5a..89c78d1 100644
--- a/drivers/net/wireless/wl12xx/boot.c
+++ b/drivers/net/wireless/wl12xx/boot.c
@@ -142,14 +142,22 @@ static void wl1271_parse_fw_ver(struct wl1271 *wl)
static void wl1271_boot_fw_version(struct wl1271 *wl)
{
- struct wl1271_static_data static_data;
+ struct wl1271_static_data *static_data;
- wl1271_read(wl, wl->cmd_box_addr, &static_data, sizeof(static_data),
+ static_data = kmalloc(sizeof(*static_data), GFP_DMA);
+ if (!static_data) {
+ __WARN();
+ return;
+ }
+
+ wl1271_read(wl, wl->cmd_box_addr, static_data, sizeof(*static_data),
false);
- strncpy(wl->chip.fw_ver_str, static_data.fw_version,
+ strncpy(wl->chip.fw_ver_str, static_data->fw_version,
sizeof(wl->chip.fw_ver_str));
+ kfree(static_data);
+
/* make sure the string is NULL-terminated */
wl->chip.fw_ver_str[sizeof(wl->chip.fw_ver_str) - 1] = '\0';
diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index 25990bd..a5c8800 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -342,8 +342,12 @@ int wl1271_cmd_ext_radio_parms(struct wl1271 *wl)
*/
static int wl1271_cmd_wait_for_event_or_timeout(struct wl1271 *wl, u32 mask)
{
- u32 events_vector, event;
+ u32 *events_vector;
+ u32 event;
unsigned long timeout;
+ int ret = 0;
+
+ events_vector = kmalloc(sizeof(*events_vector), GFP_DMA);
timeout = jiffies + msecs_to_jiffies(WL1271_EVENT_TIMEOUT);
@@ -351,21 +355,24 @@ static int wl1271_cmd_wait_for_event_or_timeout(struct wl1271 *wl, u32 mask)
if (time_after(jiffies, timeout)) {
wl1271_debug(DEBUG_CMD, "timeout waiting for event %d",
(int)mask);
- return -ETIMEDOUT;
+ ret = -ETIMEDOUT;
+ goto out;
}
msleep(1);
/* read from both event fields */
- wl1271_read(wl, wl->mbox_ptr[0], &events_vector,
- sizeof(events_vector), false);
- event = events_vector & mask;
- wl1271_read(wl, wl->mbox_ptr[1], &events_vector,
- sizeof(events_vector), false);
- event |= events_vector & mask;
+ wl1271_read(wl, wl->mbox_ptr[0], events_vector,
+ sizeof(*events_vector), false);
+ event = *events_vector & mask;
+ wl1271_read(wl, wl->mbox_ptr[1], events_vector,
+ sizeof(*events_vector), false);
+ event |= *events_vector & mask;
} while (!event);
- return 0;
+out:
+ kfree(events_vector);
+ return ret;
}
static int wl1271_cmd_wait_for_event(struct wl1271 *wl, u32 mask)
diff --git a/drivers/net/wireless/wl12xx/event.c b/drivers/net/wireless/wl12xx/event.c
index d3280df68..10007f5 100644
--- a/drivers/net/wireless/wl12xx/event.c
+++ b/drivers/net/wireless/wl12xx/event.c
@@ -233,8 +233,9 @@ static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
}
-static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
+static int wl1271_event_process(struct wl1271 *wl)
{
+ struct event_mailbox *mbox = wl->mbox;
struct ieee80211_vif *vif;
struct wl12xx_vif *wlvif;
int ret;
@@ -439,7 +440,6 @@ void wl1271_event_mbox_config(struct wl1271 *wl)
int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
{
- struct event_mailbox mbox;
int ret;
wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
@@ -448,11 +448,11 @@ int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
return -EINVAL;
/* first we read the mbox descriptor */
- wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
- sizeof(struct event_mailbox), false);
+ wl1271_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
+ sizeof(*wl->mbox), false);
/* process the descriptor */
- ret = wl1271_event_process(wl, &mbox);
+ ret = wl1271_event_process(wl);
if (ret < 0)
return ret;
diff --git a/drivers/net/wireless/wl12xx/event.h b/drivers/net/wireless/wl12xx/event.h
index 1d878ba..7a6b18b 100644
--- a/drivers/net/wireless/wl12xx/event.h
+++ b/drivers/net/wireless/wl12xx/event.h
@@ -127,6 +127,8 @@ struct event_mailbox {
u8 reserved_7[12];
} __packed;
+struct wl1271;
+
int wl1271_event_unmask(struct wl1271 *wl);
void wl1271_event_mbox_config(struct wl1271 *wl);
int wl1271_event_handle(struct wl1271 *wl, u8 mbox);
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index d5f55a1..f63fde4 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -5071,8 +5071,17 @@ static struct ieee80211_hw *wl1271_alloc_hw(void)
goto err_dummy_packet;
}
+ wl->mbox = kmalloc(sizeof(*wl->mbox), GFP_DMA);
+ if (!wl->mbox) {
+ ret = -ENOMEM;
+ goto err_fwlog;
+ }
+
return hw;
+err_fwlog:
+ free_page((unsigned long)wl->fwlog);
+
err_dummy_packet:
dev_kfree_skb(wl->dummy_packet);
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index b2b09cd..0d02c7a 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -34,6 +34,7 @@
#include "conf.h"
#include "ini.h"
+#include "event.h"
#define WL127X_FW_NAME "ti-connectivity/wl127x-fw-3.bin"
#define WL128X_FW_NAME "ti-connectivity/wl128x-fw-3.bin"
@@ -394,6 +395,8 @@ struct wl1271 {
/* Hardware recovery work */
struct work_struct recovery_work;
+ struct event_mailbox *mbox;
+
/* The mbox event mask */
u32 event_mask;
--
1.7.9.1
--
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