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Commit 8a7c71ae authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: synaptics-rmi4 - cleanup SMbus mapping handling 



There is no reason to copy structures field-by-filed when we can copy
elements at once.

Reviewed-by: default avatarBenjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 2593cd11

drivers/input/rmi4/rmi_smbus.c

+18 −25
Original line number Diff line number Diff line
@@ -83,63 +83,56 @@ static int rmi_smb_get_command_code(struct rmi_transport_dev *xport, 
{

	struct rmi_smb_xport *rmi_smb =

		container_of(xport, struct rmi_smb_xport, xport);

	struct mapping_table_entry new_map;

	int i;

	int retval;

	struct mapping_table_entry mapping_data[1];

	int retval = 0;



	mutex_lock(&rmi_smb->mappingtable_mutex);



	for (i = 0; i < RMI_SMB2_MAP_SIZE; i++) {

		struct mapping_table_entry *entry = &rmi_smb->mapping_table[i];



		if (le16_to_cpu(entry->rmiaddr) == rmiaddr) {

			if (isread) {

				if (entry->readcount == bytecount) {

					*commandcode = i;

					retval = 0;

				if (entry->readcount == bytecount)

					goto exit;

				}

			} else {

				if (entry->flags & RMI_SMB2_MAP_FLAGS_WE) {

					*commandcode = i;

					retval = 0;

					goto exit;

				}

			}

		}

	}



	i = rmi_smb->table_index;

	rmi_smb->table_index = (i + 1) % RMI_SMB2_MAP_SIZE;



	/* constructs mapping table data entry. 4 bytes each entry */

	memset(mapping_data, 0, sizeof(mapping_data));



	mapping_data[0].rmiaddr = cpu_to_le16(rmiaddr);

	mapping_data[0].readcount = bytecount;

	mapping_data[0].flags = !isread ? RMI_SMB2_MAP_FLAGS_WE : 0;



	retval = smb_block_write(xport, i + 0x80, mapping_data,

				 sizeof(mapping_data));

	memset(&new_map, 0, sizeof(new_map));

	new_map.rmiaddr = cpu_to_le16(rmiaddr);

	new_map.readcount = bytecount;

	new_map.flags = !isread ? RMI_SMB2_MAP_FLAGS_WE : 0;



	retval = smb_block_write(xport, i + 0x80, &new_map, sizeof(new_map));

	if (retval < 0) {

		/*

		 * if not written to device mapping table

		 * clear the driver mapping table records

		 */

		rmi_smb->mapping_table[i].rmiaddr = 0x0000;

		rmi_smb->mapping_table[i].readcount = 0;

		rmi_smb->mapping_table[i].flags = 0;

		goto exit;

		memset(&new_map, 0, sizeof(new_map));

	}



	/* save to the driver level mapping table */

	rmi_smb->mapping_table[i].rmiaddr = rmiaddr;

	rmi_smb->mapping_table[i].readcount = bytecount;

	rmi_smb->mapping_table[i].flags = !isread ? RMI_SMB2_MAP_FLAGS_WE : 0;

	*commandcode = i;

	rmi_smb->mapping_table[i] = new_map;



exit:

	mutex_unlock(&rmi_smb->mappingtable_mutex);



	if (retval < 0)

		return retval;



	*commandcode = i;

	return 0;

}



static int rmi_smb_write_block(struct rmi_transport_dev *xport, u16 rmiaddr,