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added locking around ring_buffer_user_read as suggested by axeld. locking is already around ring_buffer_write

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18399 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Jérôme Duval
2006-08-05 12:33:03 +00:00
parent 38c71d13d7
commit faa8b41dac
1 changed files with 9 additions and 5 deletions
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src/add-ons/kernel/drivers/input/usb_hid/hid.c
+9 -5
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@@ -624,7 +624,7 @@ usb_callback(void *cookie, uint32 busStatus,
} else
interpret_mouse_buffer(device);
release_sem (device->sem_lock);
release_sem(device->sem_lock);
}
/* issue next request */
@@ -870,12 +870,12 @@ hid_device_open(const char *name, uint32 flags,
if ((cookie = malloc (sizeof (driver_cookie))) == NULL)
return B_NO_MEMORY;
acquire_sem (device->sem_lock);
acquire_sem(device->sem_lock);
cookie->device = device;
cookie->next = device->open_fds;
device->open_fds = cookie;
device->open++;
release_sem (device->sem_lock);
release_sem(device->sem_lock);
*out_cookie = cookie;
DPRINTF_INFO ((MY_ID "device %s open (%d)\n", name, device->open));
@@ -920,7 +920,9 @@ hid_device_control(driver_cookie *cookie, uint32 op,
err = acquire_sem_etc(device->sem_cb, 1, B_CAN_INTERRUPT, 0LL);
if (err != B_OK)
return err;
acquire_sem(device->sem_lock);
ring_buffer_user_read(device->rbuf, arg, sizeof(raw_key_info));
release_sem(device->sem_lock);
return err;
break;
@@ -934,7 +936,9 @@ hid_device_control(driver_cookie *cookie, uint32 op,
err = acquire_sem_etc(device->sem_cb, 1, B_CAN_INTERRUPT, 0LL);
if (err != B_OK)
return err;
acquire_sem(device->sem_lock);
ring_buffer_user_read(device->rbuf, arg, sizeof(mouse_movement));
release_sem(device->sem_lock);
return err;
break;
case MS_NUM_EVENTS:
@@ -964,7 +968,7 @@ hid_device_close(driver_cookie *cookie)
/* detach the cookie from list */
acquire_sem (device->sem_lock);
acquire_sem(device->sem_lock);
if (device->open_fds == cookie)
device->open_fds = cookie->next;
else {
@@ -977,7 +981,7 @@ hid_device_close(driver_cookie *cookie)
}
}
--device->open;
release_sem (device->sem_lock);
release_sem(device->sem_lock);
return B_OK;
}