nvme: enhance max supported LBA format check
Only pure-iomap configurations, systems where CONFIG_BUFFER_HEAD is
disabled can enable NVMe devices with LBA formats with a blocksize
larger then the PAGE_SIZE.
Systems with buffer-heads enabled cannot currently make use of these
devices, but this will eventually get fixed. We cap the max supported
LBA format to 19, 512 KiB as support for 1 MiB LBA format still needs
some work.
Also, add a debug module parameter nvme_core.debug_large_lbas to enable
folks to shoot themselves on their foot though if they want to test
and expand support beyond what is supported, only to be used on
pure-iomap configurations.
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
1 file changed
