From c6fcf0baa6367fecd3e025253700b64ccff8c1eb Mon Sep 17 00:00:00 2001 From: Bill Pemberton Date: Tue, 27 Apr 2010 16:23:47 -0400 Subject: [PATCH 084/577] Staging: hv: don't use dynamic sized array NetVscOnChannelCallback() used a dynamic sized array that also made the frame size over 2048. Replace it with a buffer allocated from kzalloc. Signed-off-by: Bill Pemberton Cc: Hank Janssen Signed-off-by: Greg Kroah-Hartman --- drivers/staging/hv/NetVsc.c | 25 ++++++++++++++++--------- drivers/staging/hv/NetVsc.h | 1 + 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/staging/hv/NetVsc.c b/drivers/staging/hv/NetVsc.c index f84942d..a48e637 100644 --- a/drivers/staging/hv/NetVsc.c +++ b/drivers/staging/hv/NetVsc.c @@ -1288,28 +1288,33 @@ static void NetVscOnReceiveCompletion(void *Context) void NetVscOnChannelCallback(void *Context) { - const int netPacketSize = 2048; int ret; struct hv_device *device = Context; struct netvsc_device *netDevice; u32 bytesRecvd; u64 requestId; - unsigned char packet[netPacketSize]; + unsigned char *packet; struct vmpacket_descriptor *desc; - unsigned char *buffer = packet; - int bufferlen = netPacketSize; + unsigned char *buffer; + int bufferlen = NETVSC_PACKET_SIZE; DPRINT_ENTER(NETVSC); ASSERT(device); + packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char), + GFP_KERNEL); + if (!packet) + return; + buffer = packet; + netDevice = GetInboundNetDevice(device); if (!netDevice) { DPRINT_ERR(NETVSC, "net device (%p) shutting down..." "ignoring inbound packets", netDevice); DPRINT_EXIT(NETVSC); - return; + goto out; } do { @@ -1341,17 +1346,17 @@ void NetVscOnChannelCallback(void *Context) } /* reset */ - if (bufferlen > netPacketSize) { + if (bufferlen > NETVSC_PACKET_SIZE) { kfree(buffer); buffer = packet; - bufferlen = netPacketSize; + bufferlen = NETVSC_PACKET_SIZE; } } else { /* reset */ - if (bufferlen > netPacketSize) { + if (bufferlen > NETVSC_PACKET_SIZE) { kfree(buffer); buffer = packet; - bufferlen = netPacketSize; + bufferlen = NETVSC_PACKET_SIZE; } break; @@ -1375,5 +1380,7 @@ void NetVscOnChannelCallback(void *Context) PutNetDevice(device); DPRINT_EXIT(NETVSC); +out: + kfree(buffer); return; } diff --git a/drivers/staging/hv/NetVsc.h b/drivers/staging/hv/NetVsc.h index 6e0e034..a6264db 100644 --- a/drivers/staging/hv/NetVsc.h +++ b/drivers/staging/hv/NetVsc.h @@ -289,6 +289,7 @@ struct nvsp_message { /* Preallocated receive packets */ #define NETVSC_RECEIVE_PACKETLIST_COUNT 256 +#define NETVSC_PACKET_SIZE 2048 /* Per netvsc channel-specific */ struct netvsc_device { -- 1.7.0.3