mei: kill cached host and me csr values

Kill host_hw_status and me_hw_state from me hw structure that used
to cache host and me csr values.
We do not use the cached values across the function calls anymore
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/hw-me.c

@@ -270,10 +270,10 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
 static void mei_me_host_set_ready(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 hcsr = mei_hcsr_read(hw);
 
-	hw->host_hw_state = mei_hcsr_read(hw);
-	hw->host_hw_state |= H_IE | H_IG | H_RDY;
-	mei_hcsr_set(hw, hw->host_hw_state);
+	hcsr |= H_IE | H_IG | H_RDY;
+	mei_hcsr_set(hw, hcsr);
 }
 
 /**
@@ -285,9 +285,9 @@ static void mei_me_host_set_ready(struct mei_device *dev)
 static bool mei_me_host_is_ready(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 hcsr = mei_hcsr_read(hw);
 
-	hw->host_hw_state = mei_hcsr_read(hw);
-	return (hw->host_hw_state & H_RDY) == H_RDY;
+	return (hcsr & H_RDY) == H_RDY;
 }
 
 /**
@@ -299,9 +299,9 @@ static bool mei_me_host_is_ready(struct mei_device *dev)
 static bool mei_me_hw_is_ready(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 mecsr = mei_me_mecsr_read(hw);
 
-	hw->me_hw_state = mei_me_mecsr_read(hw);
-	return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA;
+	return (mecsr & ME_RDY_HRA) == ME_RDY_HRA;
 }
 
 /**
@@ -356,12 +356,13 @@ static int mei_me_hw_start(struct mei_device *dev)
 static unsigned char mei_hbuf_filled_slots(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 hcsr;
 	char read_ptr, write_ptr;
 
-	hw->host_hw_state = mei_hcsr_read(hw);
+	hcsr = mei_hcsr_read(hw);
 
-	read_ptr = (char) ((hw->host_hw_state & H_CBRP) >> 8);
-	write_ptr = (char) ((hw->host_hw_state & H_CBWP) >> 16);
+	read_ptr = (char) ((hcsr & H_CBRP) >> 8);
+	write_ptr = (char) ((hcsr & H_CBWP) >> 16);
 
 	return (unsigned char) (write_ptr - read_ptr);
 }
@@ -474,13 +475,14 @@ static int mei_me_write_message(struct mei_device *dev,
 static int mei_me_count_full_read_slots(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 me_csr;
 	char read_ptr, write_ptr;
 	unsigned char buffer_depth, filled_slots;
 
-	hw->me_hw_state = mei_me_mecsr_read(hw);
-	buffer_depth = (unsigned char)((hw->me_hw_state & ME_CBD_HRA) >> 24);
-	read_ptr = (char) ((hw->me_hw_state & ME_CBRP_HRA) >> 8);
-	write_ptr = (char) ((hw->me_hw_state & ME_CBWP_HRA) >> 16);
+	me_csr = mei_me_mecsr_read(hw);
+	buffer_depth = (unsigned char)((me_csr & ME_CBD_HRA) >> 24);
+	read_ptr = (char) ((me_csr & ME_CBRP_HRA) >> 8);
+	write_ptr = (char) ((me_csr & ME_CBWP_HRA) >> 16);
 	filled_slots = (unsigned char) (write_ptr - read_ptr);
 
 	/* check for overflow */

drivers/misc/mei/hw-me.h

@@ -51,18 +51,11 @@ struct mei_cfg {
  *
  * @cfg: per device generation config and ops
  * @mem_addr:  io memory address
- * @host_hw_state: cached host state
- * @me_hw_state:   cached me (fw) state
  * @pg_state:      power gating state
  */
 struct mei_me_hw {
 	const struct mei_cfg *cfg;
 	void __iomem *mem_addr;
-	/*
-	 * hw states of host and fw(ME)
-	 */
-	u32 host_hw_state;
-	u32 me_hw_state;
 	enum mei_pg_state pg_state;
 };