Deadlock if SPI is shared with an SD-card

[eetnev]

Hi,

I've configured both flash memory (mx25r64) and an SD-card on the same SPI bus and I'm encountering deadlock issues when the SD-card slot is left empty and the file system in the flash memory is being accessed.

It seems that sdhc_spi_request() doesn't call spi_release() if sdhc_spi_send_cmd() or sdhc_spi_write_data() fails. Is there a specific reason for this? I need to call disk_access_init() to determine if the SD-card is present or not. Naturally, if the SD-card slot is empty, the function will fail with an -ETIMEDOUT error but now the SPI is left in locked state for the reasons stated above.

For the record, everything seems to run smoothly if an SD-card has been inserted.

[ndrs-pst]

@eetnev Just letting you know that this issue has already been addressed in #72754.