[PATCH RFC v1 7/7] rtw88: fw: Convert h2c.lock from a spinlock to a mutex

Martin Blumenstingl
2021-07-17T20:41:57Z

Upcoming SDIO support may sleep in the read/write handlers. Switch
the h2c.lock from a spinlock to a mutex to allow for this behavior.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/net/wireless/realtek/rtw88/fw.c | 14 +++++++-------
drivers/net/wireless/realtek/rtw88/main.c | 2 +-
drivers/net/wireless/realtek/rtw88/main.h | 2 +-
3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/fw.c b/drivers/net/wireless/realtek/rtw88/fw.c
index 3bfa5ecc0053..5acc798299e5 100644
--- a/drivers/net/wireless/realtek/rtw88/fw.c
+++ b/drivers/net/wireless/realtek/rtw88/fw.c
@@ -285,7 +285,7 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
h2c[3], h2c[2], h2c[1], h2c[0],
h2c[7], h2c[6], h2c[5], h2c[4]);

- spin_lock(&rtwdev->h2c.lock);
+ mutex_lock(&rtwdev->h2c.lock);

box = rtwdev->h2c.last_box_num;
switch (box) {
@@ -310,9 +310,9 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
goto out;
}

- ret = read_poll_timeout_atomic(rtw_read8, box_state,
- !((box_state >> box) & 0x1), 100, 3000,
- false, rtwdev, REG_HMETFR);
+ ret = read_poll_timeout(rtw_read8, box_state,
+ !((box_state >> box) & 0x1), 100, 3000, false,
+ rtwdev, REG_HMETFR);

if (ret) {
rtw_err(rtwdev, "failed to send h2c command\n");
@@ -328,7 +328,7 @@ static void rtw_fw_send_h2c_command(struct rtw_dev *rtwdev,
rtwdev->h2c.last_box_num = 0;

out:
- spin_unlock(&rtwdev->h2c.lock);
+ mutex_unlock(&rtwdev->h2c.lock);
}

void rtw_fw_h2c_cmd_dbg(struct rtw_dev *rtwdev, u8 *h2c)
@@ -340,7 +340,7 @@ static void rtw_fw_send_h2c_packet(struct rtw_dev *rtwdev, u8 *h2c_pkt)
{
int ret;

- spin_lock(&rtwdev->h2c.lock);
+ mutex_lock(&rtwdev->h2c.lock);

FW_OFFLOAD_H2C_SET_SEQ_NUM(h2c_pkt, rtwdev->h2c.seq);
ret = rtw_hci_write_data_h2c(rtwdev, h2c_pkt, H2C_PKT_SIZE);
@@ -348,7 +348,7 @@ static void rtw_fw_send_h2c_packet(struct rtw_dev *rtwdev, u8 *h2c_pkt)
rtw_err(rtwdev, "failed to send h2c packet\n");
rtwdev->h2c.seq++;

- spin_unlock(&rtwdev->h2c.lock);
+ mutex_unlock(&rtwdev->h2c.lock);
}

void
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 5ebc4c0b4ccc..34e5bc97d9f4 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -1834,12 +1834,12 @@ int rtw_core_init(struct rtw_dev *rtwdev)
skb_queue_head_init(&rtwdev->coex.queue);
skb_queue_head_init(&rtwdev->tx_report.queue);

- spin_lock_init(&rtwdev->h2c.lock);
spin_lock_init(&rtwdev->txq_lock);
spin_lock_init(&rtwdev->tx_report.q_lock);

mutex_init(&rtwdev->mutex);
mutex_init(&rtwdev->rf_lock);
+ mutex_init(&rtwdev->h2c.lock);
mutex_init(&rtwdev->coex.mutex);
mutex_init(&rtwdev->hal.tx_power_mutex);

diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index fd213252fbe2..1788fc339afb 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -1868,7 +1868,7 @@ struct rtw_dev {
/* incicate the mail box to use with fw */
u8 last_box_num;
/* protect to send h2c to fw */
- spinlock_t lock;
+ struct mutex lock;
u32 seq;
} h2c;

--
2.32.0