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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>
hifive-unleashed-5.1
Hong Liu 2019-02-12 20:05:22 +08:00 committed by Jiri Kosina
parent b22f805bbe
commit 7e06e0d549
1 changed files with 2 additions and 2 deletions
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4
drivers/hid/intel-ish-hid/ipc/ipc.c
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@ -314,6 +314,8 @@ static int write_ipc_from_queue(struct ishtp_device *dev)
memcpy(&reg, &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);