From 690142e9882679fac4993bbb01582dd1b9440605 Mon Sep 17 00:00:00 2001 From: Mircea Gherzan Date: Sat, 17 Mar 2012 18:41:53 +0100 Subject: [PATCH] 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 Signed-off-by: Luciano Coelho --- 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 954101d..88d60c4 100644 --- a/drivers/net/wireless/wl12xx/boot.c +++ b/drivers/net/wireless/wl12xx/boot.c @@ -83,14 +83,22 @@ 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 3414fc1..82cb90a 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 60e6f27..96f06a8 100644 --- a/drivers/net/wireless/wl12xx/event.c +++ b/drivers/net/wireless/wl12xx/event.c @@ -98,8 +98,9 @@ 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; u32 vector; @@ -289,7 +290,6 @@ 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); @@ -298,11 +298,11 @@ 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 057d193..8acba0d 100644 --- a/drivers/net/wireless/wl12xx/event.h +++ b/drivers/net/wireless/wl12xx/event.h @@ -132,6 +132,8 @@ struct event_mailbox { u8 reserved_8[9]; } __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 1382043..7618eb7 100644 --- a/drivers/net/wireless/wl12xx/main.c +++ b/drivers/net/wireless/wl12xx/main.c @@ -5375,8 +5375,17 @@ 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 749a15a..82802d1 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_MULTI "ti-connectivity/wl127x-fw-4-mr.bin" #define WL127X_FW_NAME_SINGLE "ti-connectivity/wl127x-fw-4-sr.bin" @@ -416,6 +417,8 @@ struct wl1271 { /* Hardware recovery work */ struct work_struct recovery_work; + struct event_mailbox *mbox; + /* The mbox event mask */ u32 event_mask; -- 2.7.4