diff options
| author | Olaf Hering | 2011-03-21 14:41:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2011-04-05 06:33:25 +0200 |
| commit | 22356585712d1ff08fbfed152edd8b386873b238 (patch) | |
| tree | aeb0a6192077d4865d06f6b35cdbf789b390ca99 /drivers/staging/hv/connection.c | |
| parent | staging: hv: fix reversed memset arguments in hv_mouse (diff) | |
| download | kernel-qcow2-linux-22356585712d1ff08fbfed152edd8b386873b238.tar.gz kernel-qcow2-linux-22356585712d1ff08fbfed152edd8b386873b238.tar.xz kernel-qcow2-linux-22356585712d1ff08fbfed152edd8b386873b238.zip | |
staging: hv: use sync_bitops when interacting with the hypervisor
Locking is required when tweaking bits located in a shared page, use the
sync_ version of bitops. Without this change vmbus_on_event() will miss
events and as a result, vmbus_isr() will not schedule the receive tasklet.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Cc: stable <stable@kernel.org>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
Acked-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/hv/connection.c')
| -rw-r--r-- | drivers/staging/hv/connection.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/hv/connection.c b/drivers/staging/hv/connection.c index 44b203b95a22..afc8116e7aa4 100644 --- a/drivers/staging/hv/connection.c +++ b/drivers/staging/hv/connection.c @@ -296,7 +296,7 @@ void vmbus_on_event(unsigned long data) for (dword = 0; dword < maxdword; dword++) { if (recv_int_page[dword]) { for (bit = 0; bit < 32; bit++) { - if (test_and_clear_bit(bit, + if (sync_test_and_clear_bit(bit, (unsigned long *) &recv_int_page[dword])) { relid = (dword << 5) + bit; @@ -338,7 +338,7 @@ int vmbus_post_msg(void *buffer, size_t buflen) int vmbus_set_event(u32 child_relid) { /* Each u32 represents 32 channels */ - set_bit(child_relid & 31, + sync_set_bit(child_relid & 31, (unsigned long *)vmbus_connection.send_int_page + (child_relid >> 5)); |