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When of_link_to_phandle() was implemented initially, there was no way to tell if device_link_add() was failing because the supplier device hasn't been parsed yet, hasn't been added yet, the links were creating a cycle, etc. Some of these were transient errors that'd go away at a later point. However, with the current set of improved checks, if device_link_add() fails, it'll only be for permanent errors like cycles or out-of-memory errors. Also, with the addition of DL_FLAG_SYNC_STATE_ONLY flag [1] to device links, all the valid dependency cycles due to "proxy" device links (needed for correctness of sync_state() device callback) will never fail device_link_add() due to cycles. So, continuing to retry failing device links (by returning -EAGAIN) is no longer useful. At worst, it prevents platforms from setting fw_devlink=on (or better) because it prevents proper boot up. So, let's not do that anymore. [1] - https://lore.kernel.org/lkml/20191028220027.251605-1-saravanak@google.com/ Cc: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Saravana Kannan <saravanak@google.com> Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Signed-off-by: Rob Herring <robh@kernel.org> |
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| .. | ||
| unittest-data | ||
| address.c | ||
| base.c | ||
| device.c | ||
| dynamic.c | ||
| fdt_address.c | ||
| fdt.c | ||
| irq.c | ||
| Kconfig | ||
| kobj.c | ||
| Makefile | ||
| of_mdio.c | ||
| of_net.c | ||
| of_numa.c | ||
| of_private.h | ||
| of_reserved_mem.c | ||
| overlay.c | ||
| pdt.c | ||
| platform.c | ||
| property.c | ||
| resolver.c | ||
| unittest.c | ||