I've noticed that the first ext4 file loading from a MMC partition for ZynqMP takes quite some time (~ 1 second). Debugging showed, that the MMC driver reads the partition info 128 time (MAX_SEARCH_PARTITIONS) resulting in this boot delay. To fix this, let's just end creating the block drives in part_create_block_devices() when no more valid partition is found. This reduces the first file reading from ~0.9s to ~0.3s.
Signed-off-by: Stefan Roese sr@denx.de Cc: Simon Glass sjg@chromium.org Cc: AKASHI Takahiro takahiro.akashi@linaro.org Cc: Heinrich Schuchardt xypron.glpk@gmx.de --- Reasoning for RFC: I did not dig into the current disk / partition stuff too deeply, so I'm not 100% sure that this patch does not break anything. --- disk/disk-uclass.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/disk/disk-uclass.c b/disk/disk-uclass.c index d32747e2242d..2999f7285b5a 100644 --- a/disk/disk-uclass.c +++ b/disk/disk-uclass.c @@ -36,7 +36,7 @@ int part_create_block_devices(struct udevice *blk_dev) /* Add devices for each partition */ for (count = 0, part = 1; part <= MAX_SEARCH_PARTITIONS; part++) { if (part_get_info(desc, part, &info)) - continue; + break; snprintf(devname, sizeof(devname), "%s:%d", blk_dev->name, part);