Add error handling to chip_wakeup() and propagate the errors throughout
the entire driver. Add error handling to acquire_bus()/release_bus() and
host_sleep_notify()/host_wakeup_notify() functions as a result as well.
Fill the error handling to all call sites.
Reviewed-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Adham Abozaeid <adham.abozaeid@xxxxxxxxxxxxx>
Cc: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
Cc: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Cc: Claudiu Beznea <claudiu.beznea@xxxxxxxxx>
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Kalle Valo <kvalo@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
Cc: Marek Vasut <marex@xxxxxxx>
Cc: Paolo Abeni <pabeni@xxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-wireless@xxxxxxxxxxxxxxx
Cc: netdev@xxxxxxxxxxxxxxx
---
V3: New patch
V4: No change
V4: Add RB from Alexis
---
.../net/wireless/microchip/wilc1000/sdio.c | 11 +-
.../net/wireless/microchip/wilc1000/wlan.c | 154 +++++++++++++-----
.../net/wireless/microchip/wilc1000/wlan.h | 4 +-
3 files changed, 118 insertions(+), 51 deletions(-)
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index 90357c89ae29b..c26447289b71b 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -960,6 +960,7 @@ static int wilc_sdio_suspend(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct wilc *wilc = sdio_get_drvdata(func);
+ int ret;
dev_info(dev, "sdio suspend\n");
@@ -969,7 +970,11 @@ static int wilc_sdio_suspend(struct device *dev)
if (!IS_ERR(wilc->rtc_clk))
clk_disable_unprepare(wilc->rtc_clk);
- host_sleep_notify(wilc);
+ ret = host_sleep_notify(wilc);
+ if (ret) {
+ clk_prepare_enable(wilc->rtc_clk);
+ return ret;
+ }
wilc_sdio_disable_interrupt(wilc);
@@ -992,9 +997,7 @@ static int wilc_sdio_resume(struct device *dev)
wilc_sdio_init(wilc, true);
wilc_sdio_enable_interrupt(wilc);
- host_wakeup_notify(wilc);
-
- return 0;
+ return host_wakeup_notify(wilc);
}
static const struct of_device_id wilc_of_match[] = {
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index d228c5df82628..01476f8ecc36f 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -601,7 +601,7 @@ static int chip_allow_sleep(struct wilc *wilc)
return 0;
}
-static void chip_wakeup(struct wilc *wilc)
+static int chip_wakeup(struct wilc *wilc)
{
u32 ret = 0;
u32 clk_status_val = 0, trials = 0;
@@ -630,20 +630,20 @@ static void chip_wakeup(struct wilc *wilc)
ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg,
from_host_to_fw_bit);
if (ret)
- return;
+ return ret;
/* Set wake-up bit */
ret = hif_func->hif_write_reg(wilc, wakeup_reg,
wakeup_bit);
if (ret)
- return;
+ return ret;
while (trials < WAKE_UP_TRIAL_RETRY) {
ret = hif_func->hif_read_reg(wilc, clk_status_reg,
&clk_status_val);
if (ret) {
pr_err("Bus error %d %x\n", ret, clk_status_val);
- return;
+ return ret;
}
if (clk_status_val & clk_status_bit)
break;
@@ -652,42 +652,63 @@ static void chip_wakeup(struct wilc *wilc)
}
if (trials >= WAKE_UP_TRIAL_RETRY) {
pr_err("Failed to wake-up the chip\n");
- return;
+ return -ETIMEDOUT;
}
/* Sometimes spi fail to read clock regs after reading
* writing clockless registers
*/
if (wilc->io_type == WILC_HIF_SPI)
wilc->hif_func->hif_reset(wilc);
+
+ return 0;
}
-static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
+static inline int acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
{
+ int ret = 0;
+
mutex_lock(&wilc->hif_cs);
- if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode)
- chip_wakeup(wilc);
+ if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode) {
+ ret = chip_wakeup(wilc);
+ if (ret)
+ mutex_unlock(&wilc->hif_cs);
+ }
+
+ return ret;
}
-static inline void release_bus(struct wilc *wilc, enum bus_release release)
+static inline int release_bus(struct wilc *wilc, enum bus_release release)
{
+ int ret = 0;
+
if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode)
- chip_allow_sleep(wilc);
+ ret = chip_allow_sleep(wilc);
mutex_unlock(&wilc->hif_cs);
+
+ return ret;
}
-void host_wakeup_notify(struct wilc *wilc)
+int host_wakeup_notify(struct wilc *wilc)
{
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+ if (ret)
+ return ret;
+
wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
}
EXPORT_SYMBOL_GPL(host_wakeup_notify);
-void host_sleep_notify(struct wilc *wilc)
+int host_sleep_notify(struct wilc *wilc)
{
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+ if (ret)
+ return ret;
+
wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
}
EXPORT_SYMBOL_GPL(host_sleep_notify);
@@ -714,6 +735,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
int srcu_idx;
u8 *txb = wilc->tx_buffer;
struct wilc_vif *vif;
+ int rv;
if (wilc->quit)
goto out_update_cnt;
@@ -784,7 +806,10 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
goto out_unlock;
vmm_table[i] = 0x0;
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ goto out_unlock;
+
counter = 0;
func = wilc->hif_func;
do {
@@ -859,7 +884,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
goto out_release_bus;
}
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ if (ret)
+ goto out_unlock;
offset = 0;
i = 0;
@@ -921,7 +948,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
for (i = 0; i < NQUEUES; i++)
wilc->txq[i].fw.count += ac_pkt_num_to_chip[i];
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ goto out_unlock;
ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
if (ret)
@@ -930,7 +959,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
out_release_bus:
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ if (!ret && rv)
+ ret = rv;
out_unlock:
mutex_unlock(&wilc->txq_add_to_head_cs);
@@ -1059,8 +1090,14 @@ static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
void wilc_handle_isr(struct wilc *wilc)
{
u32 int_status;
+ int ret;
+
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret) {
+ dev_err_ratelimited(wilc->dev, "Cannot acquire bus\n");
+ return;
+ }
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
wilc->hif_func->hif_read_int(wilc, &int_status);
if (int_status & DATA_INT_EXT)
@@ -1069,7 +1106,9 @@ void wilc_handle_isr(struct wilc *wilc)
if (!(int_status & (ALL_INT_EXT)))
wilc_unknown_isr_ext(wilc);
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ if (ret)
+ dev_err_ratelimited(wilc->dev, "Cannot release bus\n");
}
EXPORT_SYMBOL_GPL(wilc_handle_isr);
@@ -1081,6 +1120,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
u8 *dma_buffer;
int ret = 0;
u32 reg = 0;
+ int rv;
blksz = BIT(12);
@@ -1091,7 +1131,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
offset = 0;
pr_debug("%s: Downloading firmware size = %d\n", __func__, buffer_size);
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ return ret;
wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
reg &= ~BIT(10);
@@ -1100,11 +1142,17 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
if (reg & BIT(10))
pr_err("%s: Failed to reset\n", __func__);
- release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ ret = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ if (ret)
+ goto fail;
+
do {
addr = get_unaligned_le32(&buffer[offset]);
size = get_unaligned_le32(&buffer[offset + 4]);
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ goto fail;
+
offset += 8;
while (((int)size) && (offset < buffer_size)) {
if (size <= blksz)
@@ -1122,7 +1170,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
offset += size2;
size -= size2;
}
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ if (!ret && rv)
+ ret = rv;
if (ret) {
pr_err("%s Bus error\n", __func__);
@@ -1141,7 +1191,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
int wilc_wlan_start(struct wilc *wilc)
{
u32 reg = 0;
- int ret;
+ int ret, rv;
u32 chipid;
if (wilc->io_type == WILC_HIF_SDIO) {
@@ -1150,7 +1200,10 @@ int wilc_wlan_start(struct wilc *wilc)
} else if (wilc->io_type == WILC_HIF_SPI) {
reg = 1;
}
- acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ if (ret)
+ return ret;
+
ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
if (ret)
goto release;
@@ -1181,16 +1234,18 @@ int wilc_wlan_start(struct wilc *wilc)
wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
release:
- release_bus(wilc, WILC_BUS_RELEASE_ONLY);
- return ret;
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ return ret ? ret : rv;
}
int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
{
u32 reg = 0;
- int ret;
+ int ret, rv;
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ return ret;
ret = wilc->hif_func->hif_read_reg(wilc, GLOBAL_MODE_CONTROL, ®);
if (ret)
@@ -1226,9 +1281,9 @@ int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
ret = 0;
release:
/* host comm is disabled - we can't issue sleep command anymore: */
- release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
- return ret;
+ return ret ? ret : rv;
}
void wilc_wlan_cleanup(struct net_device *dev)
@@ -1433,11 +1488,13 @@ static int wilc_get_chipid(struct wilc *wilc)
static int init_chip(struct net_device *dev)
{
u32 reg;
- int ret = 0;
+ int ret, rv;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc = vif->wilc;
- acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ return ret;
ret = wilc_get_chipid(wilc);
if (ret)
@@ -1469,17 +1526,19 @@ static int init_chip(struct net_device *dev)
}
release:
- release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
- return ret;
+ return ret ? ret : rv;
}
int wilc_load_mac_from_nv(struct wilc *wl)
{
- int ret = -EINVAL;
+ int ret, rv;
unsigned int i;
- acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ ret = acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ if (ret)
+ return ret;
for (i = 0; i < WILC_NVMEM_MAX_NUM_BANK; i++) {
int bank_offset = get_bank_offset_from_bank_index(i);
@@ -1518,14 +1577,14 @@ int wilc_load_mac_from_nv(struct wilc *wl)
break;
}
- release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP);
- return ret;
+ rv = release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return ret ? ret : rv;
}
EXPORT_SYMBOL_GPL(wilc_load_mac_from_nv);
int wilc_wlan_init(struct net_device *dev)
{
- int ret = 0;
+ int ret = 0, rv;
struct wilc_vif *vif = netdev_priv(dev);
struct wilc *wilc;
@@ -1534,11 +1593,16 @@ int wilc_wlan_init(struct net_device *dev)
wilc->quit = 0;
if (!wilc->hif_func->hif_is_init(wilc)) {
- acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ if (ret)
+ return ret;
+
ret = wilc->hif_func->hif_init(wilc, false);
if (!ret)
ret = wilc_get_chipid(wilc);
- release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ if (!ret && rv)
+ ret = rv;
if (ret)
goto fail;
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index e75a5c8aaecec..4e2b0c4ac1e21 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -436,8 +436,8 @@ netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev);
void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size);
bool wilc_wfi_mgmt_frame_rx(struct wilc_vif *vif, u8 *buff, u32 size);
-void host_wakeup_notify(struct wilc *wilc);
-void host_sleep_notify(struct wilc *wilc);
+int host_wakeup_notify(struct wilc *wilc);
+int host_sleep_notify(struct wilc *wilc);
int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
u32 count);
int wilc_wlan_init(struct net_device *dev);
--
2.45.2
