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mlxsw: core_env: Avoid unnecessary memcpy()s

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Simply get a pointer to the data in the register payload instead of
copying it to a temporary buffer.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2021-06-24 22:47:24 +03:00 committed by David S. Miller
parent e8192476de
commit 911bd1b1f0
1 changed files with 8 additions and 8 deletions
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16
drivers/net/ethernet/mellanox/mlxsw/core_env.c
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@ -26,8 +26,8 @@ struct mlxsw_env {
static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
bool *qsfp, bool *cmis)
{
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u8 ident;
int err;
@ -36,7 +36,7 @@ static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
err = mlxsw_reg_query(core, MLXSW_REG(mcia), mcia_pl);
if (err)
return err;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
ident = eeprom_tmp[0];
*cmis = false;
switch (ident) {
@ -64,8 +64,8 @@ mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
u16 offset, u16 size, void *data,
bool qsfp, unsigned int *p_read_size)
{
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u16 i2c_addr;
u8 page = 0;
int status;
@ -116,7 +116,7 @@ mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
if (status)
return -EIO;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
memcpy(data, eeprom_tmp, size);
*p_read_size = size;
@ -127,13 +127,13 @@ int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
int off, int *temp)
{
unsigned int module_temp, module_crit, module_emerg;
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
union {
u8 buf[MLXSW_REG_MCIA_TH_ITEM_SIZE];
u16 temp;
} temp_thresh;
char mcia_pl[MLXSW_REG_MCIA_LEN] = {0};
char mtmp_pl[MLXSW_REG_MTMP_LEN];
char *eeprom_tmp;
bool qsfp, cmis;
int page;
int err;
@ -195,7 +195,7 @@ int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
if (err)
return err;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
memcpy(temp_thresh.buf, eeprom_tmp, MLXSW_REG_MCIA_TH_ITEM_SIZE);
*temp = temp_thresh.temp * 1000;
@ -357,8 +357,8 @@ mlxsw_env_get_module_eeprom_by_page(struct mlxsw_core *mlxsw_core, u8 module,
device_addr = page->offset;
while (bytes_read < page->length) {
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u8 size;
int err;
@ -380,7 +380,7 @@ mlxsw_env_get_module_eeprom_by_page(struct mlxsw_core *mlxsw_core, u8 module,
if (err)
return err;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
memcpy(page->data + bytes_read, eeprom_tmp, size);
bytes_read += size;
}