Currently, the sf command will probe anything attached to an spi bus, regardless of whether it is UCLASS_SPI_FLASH. This came up when testing the mmc_spi driver, which is accessed via spi but is UCLASS_MMC. If the uclass is not what sf expects, then the "flash" variable will not actually have type spi_nor. This patch adds a check so we don't clobber any data if the user requests us to probe a device which is not an spi flash.
Signed-off-by Sean Anderson seanga2@gmail.com --- cmd/sf.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/cmd/sf.c b/cmd/sf.c index e993b3e5ad..21a410c40f 100644 --- a/cmd/sf.c +++ b/cmd/sf.c @@ -132,6 +132,10 @@ static int do_spi_flash_probe(int argc, char * const argv[]) printf("Failed to initialize SPI flash at %u:%u (error %d)\n", bus, cs, ret); return 1; + } else if (new->driver->id != UCLASS_SPI_FLASH) { + printf("SPI device is not SPI flash: uclass is %d, expected %d\n", + new->driver->id, UCLASS_SPU_FLASH); + return 1; }
flash = dev_get_uclass_priv(new);