tree 25a6adaf951e33440574d5b1c33badc76700d790
parent 15f7e0dc01d8a851fb1bfbf0e47eab5b67ed26b3
author litchipi <litchi.pi@protonmail.com> 1623747186 +0000
committer Peng Fan <peng.fan@nxp.com> 1627636335 +0800

mmc: rpmb: Fix driver routing memory alignment with tmp buffer

Fix mmc_rpmb_route_frames() implementation to comply with most MMC
drivers that expect some alignment of MMC data frames in memory.

When called from drivers/tee/optee/rpmb.c, the address passed is not
aligned properly. OP-TEE OS inserts a 6-byte header before a raw RPMB
frame which makes RPMB data buffer not 32bit aligned. To prevent breaking
ABI with OPTEE-OS RPC memrefs, allocate a temporary buffer to copy the
data into an aligned memory.

Many RPMB drivers implicitly expect 32bit alignment of the eMMC frame
including arm_pl180_mmci.c, sandbox_mmc.c and stm32_sdmmc2.c

Signed-off-by: Timothée Cercueil <timothee.cercueil@st.com>
Signed-off-by: Timothée Cercueil <litchi.pi@protonmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>