[PATCH] drivers: ipmi: Support for both IPMB Req and Resp

[Vijay Khemka <vijaykhemka@fb.com>]

Removed check for request or response in IPMB packets coming from
device as well as from host. Now it supports both way communication
to device via IPMB. Both request and response will be passed to
application.

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
---
 drivers/char/ipmi/ipmb_dev_int.c | 29 +----------------------------
 1 file changed, 1 insertion(+), 28 deletions(-)

diff --git a/drivers/char/ipmi/ipmb_dev_int.c b/drivers/char/ipmi/ipmb_dev_int.c
index 285e0b8f9a97..7201fdb533d8 100644
--- a/drivers/char/ipmi/ipmb_dev_int.c
+++ b/drivers/char/ipmi/ipmb_dev_int.c
@@ -133,9 +133,6 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf,
 	rq_sa = GET_7BIT_ADDR(msg[RQ_SA_8BIT_IDX]);
 	netf_rq_lun = msg[NETFN_LUN_IDX];
 
-	if (!(netf_rq_lun & NETFN_RSP_BIT_MASK))
-		return -EINVAL;
-
 	/*
 	 * subtract rq_sa and netf_rq_lun from the length of the msg passed to
 	 * i2c_smbus_xfer
@@ -203,28 +200,6 @@ static u8 ipmb_verify_checksum1(struct ipmb_dev *ipmb_dev, u8 rs_sa)
 		ipmb_dev->request.checksum1);
 }
 
-static bool is_ipmb_request(struct ipmb_dev *ipmb_dev, u8 rs_sa)
-{
-	if (ipmb_dev->msg_idx >= IPMB_REQUEST_LEN_MIN) {
-		if (ipmb_verify_checksum1(ipmb_dev, rs_sa))
-			return false;
-
-		/*
-		 * Check whether this is an IPMB request or
-		 * response.
-		 * The 6 MSB of netfn_rs_lun are dedicated to the netfn
-		 * while the remaining bits are dedicated to the lun.
-		 * If the LSB of the netfn is cleared, it is associated
-		 * with an IPMB request.
-		 * If the LSB of the netfn is set, it is associated with
-		 * an IPMB response.
-		 */
-		if (!(ipmb_dev->request.netfn_rs_lun & NETFN_RSP_BIT_MASK))
-			return true;
-	}
-	return false;
-}
-
 /*
  * The IPMB protocol only supports I2C Writes so there is no need
  * to support I2C_SLAVE_READ* events.
@@ -273,9 +248,7 @@ static int ipmb_slave_cb(struct i2c_client *client,
 
 	case I2C_SLAVE_STOP:
 		ipmb_dev->request.len = ipmb_dev->msg_idx;
-
-		if (is_ipmb_request(ipmb_dev, GET_8BIT_ADDR(client->addr)))
-			ipmb_handle_request(ipmb_dev);
+		ipmb_handle_request(ipmb_dev);
 		break;
 
 	default:
-- 
2.17.1