diff options
| -rw-r--r-- | drivers/net/wireless/wcnss/wcnss_wlan.c | 87 |
1 files changed, 51 insertions, 36 deletions
diff --git a/drivers/net/wireless/wcnss/wcnss_wlan.c b/drivers/net/wireless/wcnss/wcnss_wlan.c index 9db2871e8150..450b7ad8bf7f 100644 --- a/drivers/net/wireless/wcnss/wcnss_wlan.c +++ b/drivers/net/wireless/wcnss/wcnss_wlan.c @@ -398,7 +398,6 @@ static struct { int user_cal_available; u32 user_cal_rcvd; int user_cal_exp_size; - int device_opened; int iris_xo_mode_set; int fw_vbatt_state; char wlan_nv_macAddr[WLAN_MAC_ADDR_SIZE]; @@ -3265,14 +3264,6 @@ static int wcnss_node_open(struct inode *inode, struct file *file) return -EFAULT; } - mutex_lock(&penv->dev_lock); - penv->user_cal_rcvd = 0; - penv->user_cal_read = 0; - penv->user_cal_available = false; - penv->user_cal_data = NULL; - penv->device_opened = 1; - mutex_unlock(&penv->dev_lock); - return rc; } @@ -3281,7 +3272,7 @@ static ssize_t wcnss_wlan_read(struct file *fp, char __user { int rc = 0; - if (!penv || !penv->device_opened) + if (!penv) return -EFAULT; rc = wait_event_interruptible(penv->read_wait, penv->fw_cal_rcvd @@ -3318,55 +3309,66 @@ static ssize_t wcnss_wlan_write(struct file *fp, const char __user *user_buffer, size_t count, loff_t *position) { int rc = 0; - u32 size = 0; + char *cal_data = NULL; - if (!penv || !penv->device_opened || penv->user_cal_available) + if (!penv || penv->user_cal_available) return -EFAULT; - if (penv->user_cal_rcvd == 0 && count >= 4 - && !penv->user_cal_data) { - rc = copy_from_user((void *)&size, user_buffer, 4); - if (!size || size > MAX_CALIBRATED_DATA_SIZE) { - pr_err(DEVICE " invalid size to write %d\n", size); + if (!penv->user_cal_rcvd && count >= 4 && !penv->user_cal_exp_size) { + mutex_lock(&penv->dev_lock); + rc = copy_from_user((void *)&penv->user_cal_exp_size, + user_buffer, 4); + if (!penv->user_cal_exp_size || + penv->user_cal_exp_size > MAX_CALIBRATED_DATA_SIZE) { + pr_err(DEVICE " invalid size to write %d\n", + penv->user_cal_exp_size); + penv->user_cal_exp_size = 0; + mutex_unlock(&penv->dev_lock); return -EFAULT; } - - rc += count; - count -= 4; - penv->user_cal_exp_size = size; - penv->user_cal_data = kmalloc(size, GFP_KERNEL); - if (penv->user_cal_data == NULL) { - pr_err(DEVICE " no memory to write\n"); - return -ENOMEM; - } - if (0 == count) - goto exit; - - } else if (penv->user_cal_rcvd == 0 && count < 4) + mutex_unlock(&penv->dev_lock); + return count; + } else if (!penv->user_cal_rcvd && count < 4) { return -EFAULT; + } + mutex_lock(&penv->dev_lock); if ((UINT32_MAX - count < penv->user_cal_rcvd) || (penv->user_cal_exp_size < count + penv->user_cal_rcvd)) { pr_err(DEVICE " invalid size to write %zu\n", count + penv->user_cal_rcvd); - rc = -ENOMEM; - goto exit; + mutex_unlock(&penv->dev_lock); + return -ENOMEM; } - rc = copy_from_user((void *)penv->user_cal_data + - penv->user_cal_rcvd, user_buffer, count); - if (0 == rc) { + + cal_data = kmalloc(count, GFP_KERNEL); + if (!cal_data) { + mutex_unlock(&penv->dev_lock); + return -ENOMEM; + } + + rc = copy_from_user(cal_data, user_buffer, count); + if (!rc) { + memcpy(penv->user_cal_data + penv->user_cal_rcvd, + cal_data, count); penv->user_cal_rcvd += count; rc += count; } + + kfree(cal_data); if (penv->user_cal_rcvd == penv->user_cal_exp_size) { penv->user_cal_available = true; pr_info_ratelimited("wcnss: user cal written"); } + mutex_unlock(&penv->dev_lock); -exit: return rc; } +static int wcnss_node_release(struct inode *inode, struct file *file) +{ + return 0; +} static int wcnss_notif_cb(struct notifier_block *this, unsigned long code, void *ss_handle) @@ -3425,6 +3427,7 @@ static const struct file_operations wcnss_node_fops = { .open = wcnss_node_open, .read = wcnss_wlan_read, .write = wcnss_wlan_write, + .release = wcnss_node_release, }; static struct miscdevice wcnss_misc = { @@ -3452,6 +3455,13 @@ wcnss_wlan_probe(struct platform_device *pdev) } penv->pdev = pdev; + penv->user_cal_data = + devm_kzalloc(&pdev->dev, MAX_CALIBRATED_DATA_SIZE, GFP_KERNEL); + if (!penv->user_cal_data) { + dev_err(&pdev->dev, "Failed to alloc memory for cal data.\n"); + return -ENOMEM; + } + /* register sysfs entries */ ret = wcnss_create_sysfs(&pdev->dev); if (ret) { @@ -3472,6 +3482,11 @@ wcnss_wlan_probe(struct platform_device *pdev) mutex_init(&penv->pm_qos_mutex); init_waitqueue_head(&penv->read_wait); + penv->user_cal_rcvd = 0; + penv->user_cal_read = 0; + penv->user_cal_exp_size = 0; + penv->user_cal_available = false; + /* Since we were built into the kernel we'll be called as part * of kernel initialization. We don't know if userspace * applications are available to service PIL at this time |