st-sdmmc: Handle short not cache aligned buffers

Possible data sources for SD driver:

- mmc_sd_switch():
    - length: 64 byte;
    - buffer on stack
- mmc_test_bus_width():
    - length: 4 or 8 byte
    - buffer in program memory or on stack
- mmc_app_send_scr():
    - length: 8 byte
    - buffer from device ivar structure
- mmc_app_sd_status():
    - length: 64 byte
    - buffer from device ivar structure
- mmc_send_ext_csd():
    - length: MMC_EXTCSD_SIZE = 512
    - buffer from device ivar structure
- rtems_bsd_mmcsd_disk_read_write():
    - length: depends on read
    - buffer from rtems_blkdev buffer -> already aligned
- mmcsd_ioctl_cmd():
    - length: depends on call
    - buffer malloced, not aligned -> patched in RTEMS

So the problematic buffers are only the ones up to 512 bytes. Copy these data
into a buffer to avoid that problem.

0 files changed, 0 insertions, 0 deletions