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Input: synaptics-rmi4 - cleanup SMbus mapping handling

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

Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2017-03-24 12:45:35 -07:00
parent 2593cd1189
commit 8a7c71ae38
1 changed files with 18 additions and 25 deletions
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41
drivers/input/rmi4/rmi_smbus.c
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@ -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,