diff options
| author | Haiyang Zhang <haiyangz@microsoft.com> | 2010-05-28 23:22:44 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-30 08:18:14 -0700 |
| commit | 8b5d6d3bd3e34e4cc67d875c8c88007c1c9aa960 (patch) | |
| tree | 2f923d8299574a31799c14bfd9ecc10520ed9b02 /drivers/staging/hv/vmbus_drv.c | |
| parent | 6c2fd308045ba902fbe9f4408daa7b949fa8f5a1 (diff) | |
staging: hv: Fix race condition on vmbus channel initialization
There is a possible race condition when hv_utils starts to load immediately
after hv_vmbus is loading - null pointer error could happen.
This patch added wait/completion to ensure all channels are ready before
vmbus loading completes. So another module won't have any uninitialized channel.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/hv/vmbus_drv.c')
| -rw-r--r-- | drivers/staging/hv/vmbus_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c index c21731a12ca..22c80ece638 100644 --- a/drivers/staging/hv/vmbus_drv.c +++ b/drivers/staging/hv/vmbus_drv.c @@ -27,6 +27,7 @@ #include <linux/pci.h> #include <linux/dmi.h> #include <linux/slab.h> +#include <linux/completion.h> #include "version_info.h" #include "osd.h" #include "logging.h" @@ -356,6 +357,8 @@ static int vmbus_bus_init(int (*drv_init)(struct hv_driver *drv)) vmbus_drv_obj->GetChannelOffers(); + wait_for_completion(&hv_channel_ready); + cleanup: DPRINT_EXIT(VMBUS_DRV); |