Commit d09bc836 authored by Dexuan Cui's avatar Dexuan Cui Committed by Sasha Levin

Input: hyperv-keyboard: Use in-place iterator API in the channel callback

Simplify the ring buffer handling with the in-place API.

Also avoid the dynamic allocation and the memory leak in the channel
callback function.
Signed-off-by: default avatarDexuan Cui <[email protected]>
Acked-by: default avatarDmitry Torokhov <[email protected]>
Signed-off-by: default avatarSasha Levin <[email protected]>
parent 16c75963
......@@ -237,40 +237,17 @@ static void hv_kbd_handle_received_packet(struct hv_device *hv_dev,
static void hv_kbd_on_channel_callback(void *context)
struct vmpacket_descriptor *desc;
struct hv_device *hv_dev = context;
void *buffer;
int bufferlen = 0x100; /* Start with sensible size */
u32 bytes_recvd;
u64 req_id;
int error;
buffer = kmalloc(bufferlen, GFP_ATOMIC);
if (!buffer)
while (1) {
error = vmbus_recvpacket_raw(hv_dev->channel, buffer, bufferlen,
&bytes_recvd, &req_id);
switch (error) {
case 0:
if (bytes_recvd == 0) {
hv_kbd_handle_received_packet(hv_dev, buffer,
bytes_recvd, req_id);
foreach_vmbus_pkt(desc, hv_dev->channel) {
bytes_recvd = desc->len8 * 8;
req_id = desc->trans_id;
case -ENOBUFS:
/* Handle large packet */
bufferlen = bytes_recvd;
buffer = kmalloc(bytes_recvd, GFP_ATOMIC);
if (!buffer)
hv_kbd_handle_received_packet(hv_dev, desc, bytes_recvd,
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment