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| author | Javier Martinez Canillas <javier.martinez@collabora.co.uk> | 2015-02-02 12:26:22 +0100 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2015-02-27 00:44:52 +0100 |
| commit | 1b84f2a4cd4a6f517a313261f6f7c8caae5696c6 (patch) | |
| tree | 8e7b0f5a1477c8792a83c7de0b03b8dc0ad737a1 /include | |
| parent | Linux 4.0-rc1 (diff) | |
| download | linux-1b84f2a4cd4a6f517a313261f6f7c8caae5696c6.tar.xz linux-1b84f2a4cd4a6f517a313261f6f7c8caae5696c6.zip | |
mfd: cros_ec: Use fixed size arrays to transfer data with the EC
The struct cros_ec_command will be used as an ioctl() argument for the
API to control the ChromeOS EC from user-space. So the data structure
has to be 64-bit safe to make it compatible between 32 and 64 avoiding
the need for a compat ioctl interface. Since pointers are self-aligned
to different byte boundaries, use fixed size arrays instead of pointers
for transferring ingoing and outgoing data with the Embedded Controller.
Also, re-arrange struct members by decreasing alignment requirements to
reduce the needing padding size.
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: Lee Jones <lee.jones@linaro.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mfd/cros_ec.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index 0e166b92f5b4..71675b14b5ca 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -38,20 +38,20 @@ enum { /* * @version: Command version number (often 0) * @command: Command to send (EC_CMD_...) - * @outdata: Outgoing data to EC * @outsize: Outgoing length in bytes - * @indata: Where to put the incoming data from EC * @insize: Max number of bytes to accept from EC * @result: EC's response to the command (separate from communication failure) + * @outdata: Outgoing data to EC + * @indata: Where to put the incoming data from EC */ struct cros_ec_command { uint32_t version; uint32_t command; - uint8_t *outdata; uint32_t outsize; - uint8_t *indata; uint32_t insize; uint32_t result; + uint8_t outdata[EC_PROTO2_MAX_PARAM_SIZE]; + uint8_t indata[EC_PROTO2_MAX_PARAM_SIZE]; }; /** |