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authorSudeep Holla <sudeep.holla@arm.com>2016-01-29 16:35:44 +0300
committerSudeep Holla <sudeep.holla@arm.com>2016-02-16 12:26:27 +0300
commitdd9a1d69ba90be7fe742c6234e6bd09706b7aaea (patch)
treedba23781d3679e485675ce0b6317f9322e71da28 /drivers/firmware/arm_scpi.c
parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
downloadlinux-dd9a1d69ba90be7fe742c6234e6bd09706b7aaea.tar.xz
firmware: arm_scpi: fix send_message and sensor_get_value for big-endian
scpi_process_cmd converts the status word from little endian to cpu endianness. However scpi_send_message again does the conversion which is wrong and shows up as a bug only when running in big-endian kernel. Similarly scpi_sensor_get_value passes the sensor index in the cpu endianness to SCP which results in SCPI_ERR_RANGE in big-endian mode. This patch fixes the above mentioned issue for big-endian kernel. Acked-by: Punit Agrawal <punit.agrawal@arm.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Diffstat (limited to 'drivers/firmware/arm_scpi.c')
-rw-r--r--drivers/firmware/arm_scpi.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 6174db80c663..3cb591eca951 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -373,7 +373,7 @@ static int scpi_send_message(u8 cmd, void *tx_buf, unsigned int tx_len,
ret = -ETIMEDOUT;
else
/* first status word */
- ret = le32_to_cpu(msg->status);
+ ret = msg->status;
out:
if (ret < 0 && rx_buf) /* remove entry from the list if timed-out */
scpi_process_cmd(scpi_chan, msg->cmd);
@@ -527,10 +527,11 @@ static int scpi_sensor_get_info(u16 sensor_id, struct scpi_sensor_info *info)
int scpi_sensor_get_value(u16 sensor, u32 *val)
{
+ __le16 id = cpu_to_le16(sensor);
struct sensor_value buf;
int ret;
- ret = scpi_send_message(SCPI_CMD_SENSOR_VALUE, &sensor, sizeof(sensor),
+ ret = scpi_send_message(SCPI_CMD_SENSOR_VALUE, &id, sizeof(id),
&buf, sizeof(buf));
if (!ret)
*val = le32_to_cpu(buf.val);