diff options
| author |   Hong Liu <hong.liu@intel.com> | 2019-02-12 20:05:22 +0800 |
|---|---|---|
| committer |   Jiri Kosina <jkosina@suse.cz> | 2019-02-15 22:47:21 +0100 |
| commit | 7e06e0d5493b3e88016b247fe92f67a071d2c655 (patch) | |
| tree | b9d435dd67ced4d59629795a5bfefdfcaae7ec9c /drivers/hid/intel-ish-hid | |
| parent | HID: intel-ish-hid: Optimize writing ipc message from queue (diff) | |
| download | wireguard-linux-7e06e0d5493b3e88016b247fe92f67a071d2c655.tar.xz wireguard-linux-7e06e0d5493b3e88016b247fe92f67a071d2c655.zip | |
HID: intel-ish-hid: move doorbell writing before flush
Reading of IPC_REG_ISH_HOST_FWSTS will flush both message register
and doorbell. So move the doorbell write before reading of
IPC_REG_ISH_HOST_FWSTS.
Signed-off-by: Hong Liu <hong.liu@intel.com>
Tested-by: Hongyan Song <hongyan.song@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/intel-ish-hid')
| -rw-r--r-- | drivers/hid/intel-ish-hid/ipc/ipc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c index ff8eca11ff73..30d8a639a5bb 100644 --- a/drivers/hid/intel-ish-hid/ipc/ipc.c +++ b/drivers/hid/intel-ish-hid/ipc/ipc.c @@ -314,6 +314,8 @@ static int write_ipc_from_queue(struct ishtp_device *dev) memcpy(®, &r_buf[length >> 2], rem); ish_reg_write(dev, reg_addr, reg); } + ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, doorbell_val); + /* Flush writes to msg registers and doorbell */ ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS); @@ -321,8 +323,6 @@ static int write_ipc_from_queue(struct ishtp_device *dev) ++dev->ipc_tx_cnt; dev->ipc_tx_bytes_cnt += IPC_HEADER_GET_LENGTH(doorbell_val); - ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, doorbell_val); - ipc_send_compl = ipc_link->ipc_send_compl; ipc_send_compl_prm = ipc_link->ipc_send_compl_prm; list_del_init(&ipc_link->link); |