From 334bed089d3d74e64a34b0ebee52b146b6778a6b Mon Sep 17 00:00:00 2001 From: Binoy Jayan Date: Wed, 15 Jun 2016 11:00:35 +0530 Subject: [PATCH] staging: wilc1000: Replace semaphore txq_add_to_head_cs with mutex The semaphore 'txq_add_to_head_cs' is a simple mutex, so it should be written as one. Semaphores are going away in the future. Also, removing the timeout scenario as the error handling code does not propagate the timeout properly. Signed-off-by: Binoy Jayan Reviewed-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wilc1000/linux_wlan.c | 4 ++-- drivers/staging/wilc1000/wilc_wfi_netdevice.h | 3 ++- drivers/staging/wilc1000/wilc_wlan.c | 11 ++++------- 3 files changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c index baf932681362..5dc645c539a8 100644 --- a/drivers/staging/wilc1000/linux_wlan.c +++ b/drivers/staging/wilc1000/linux_wlan.c @@ -20,7 +20,7 @@ #include #include #include - +#include #include #include @@ -679,7 +679,7 @@ static int wlan_init_locks(struct net_device *dev) mutex_init(&wl->rxq_cs); spin_lock_init(&wl->txq_spinlock); - sema_init(&wl->txq_add_to_head_cs, 1); + mutex_init(&wl->txq_add_to_head_cs); init_completion(&wl->txq_event); diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h b/drivers/staging/wilc1000/wilc_wfi_netdevice.h index 12d7c7b1a5fe..239cd436861c 100644 --- a/drivers/staging/wilc1000/wilc_wfi_netdevice.h +++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.h @@ -43,6 +43,7 @@ #include "wilc_wlan.h" #include #include +#include #define FLOW_CONTROL_LOWER_THRESHOLD 128 #define FLOW_CONTROL_UPPER_THRESHOLD 256 @@ -171,7 +172,7 @@ struct wilc { struct wilc_vif *vif[NUM_CONCURRENT_IFC]; u8 open_ifcs; - struct semaphore txq_add_to_head_cs; + struct mutex txq_add_to_head_cs; spinlock_t txq_spinlock; struct mutex rxq_cs; diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c index 1a571352bc96..9afbe8dc327f 100644 --- a/drivers/staging/wilc1000/wilc_wlan.c +++ b/drivers/staging/wilc1000/wilc_wlan.c @@ -99,9 +99,7 @@ static int wilc_wlan_txq_add_to_head(struct wilc_vif *vif, unsigned long flags; struct wilc *wilc = vif->wilc; - if (wilc_lock_timeout(wilc, &wilc->txq_add_to_head_cs, - CFG_PKTS_TIMEOUT)) - return -1; + mutex_lock(&wilc->txq_add_to_head_cs); spin_lock_irqsave(&wilc->txq_spinlock, flags); @@ -119,7 +117,7 @@ static int wilc_wlan_txq_add_to_head(struct wilc_vif *vif, wilc->txq_entries += 1; spin_unlock_irqrestore(&wilc->txq_spinlock, flags); - up(&wilc->txq_add_to_head_cs); + mutex_unlock(&wilc->txq_add_to_head_cs); complete(&wilc->txq_event); return 0; @@ -573,8 +571,7 @@ int wilc_wlan_handle_txq(struct net_device *dev, u32 *txq_count) if (wilc->quit) break; - wilc_lock_timeout(wilc, &wilc->txq_add_to_head_cs, - CFG_PKTS_TIMEOUT); + mutex_lock(&wilc->txq_add_to_head_cs); wilc_wlan_txq_filter_dup_tcp_ack(dev); tqe = wilc_wlan_txq_get_first(wilc); i = 0; @@ -755,7 +752,7 @@ _end_: if (ret != 1) break; } while (0); - up(&wilc->txq_add_to_head_cs); + mutex_unlock(&wilc->txq_add_to_head_cs); wilc->txq_exit = 1; *txq_count = wilc->txq_entries; -- 2.20.1