diff options
| author | Dexuan Cui <decui@microsoft.com> | 2019-08-20 06:01:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-10 12:32:17 +0300 |
| commit | 761c2787b067768b52d2f29658a64018fe9ae7b0 (patch) | |
| tree | be2dc5d383680362bf02dd35b6750f5bafcdeea5 | |
| parent | 7154042ecd972e14414806fecc847679e86b746d (diff) | |
| download | linux-761c2787b067768b52d2f29658a64018fe9ae7b0.tar.xz | |
Input: hyperv-keyboard: Use in-place iterator API in the channel callback
[ Upstream commit d09bc83640d524b8467a660db7b1d15e6562a1de ]
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: Dexuan Cui <decui@microsoft.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/input/serio/hyperv-keyboard.c | 35 |
1 files changed, 6 insertions, 29 deletions
diff --git a/drivers/input/serio/hyperv-keyboard.c b/drivers/input/serio/hyperv-keyboard.c index 55288a026e4e..c137ffa6fdec 100644 --- a/drivers/input/serio/hyperv-keyboard.c +++ b/drivers/input/serio/hyperv-keyboard.c @@ -245,40 +245,17 @@ 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) - return; - - while (1) { - error = vmbus_recvpacket_raw(hv_dev->channel, buffer, bufferlen, - &bytes_recvd, &req_id); - switch (error) { - case 0: - if (bytes_recvd == 0) { - kfree(buffer); - return; - } - - hv_kbd_handle_received_packet(hv_dev, buffer, - bytes_recvd, req_id); - break; + foreach_vmbus_pkt(desc, hv_dev->channel) { + bytes_recvd = desc->len8 * 8; + req_id = desc->trans_id; - case -ENOBUFS: - kfree(buffer); - /* Handle large packet */ - bufferlen = bytes_recvd; - buffer = kmalloc(bytes_recvd, GFP_ATOMIC); - if (!buffer) - return; - break; - } + hv_kbd_handle_received_packet(hv_dev, desc, bytes_recvd, + req_id); } } |