17.08.2021 07:37, Christoph Hellwig пишет: > On Tue, Aug 17, 2021 at 04:36:42AM +0300, Dmitry Osipenko wrote: >> + if (bdev->bd_disk->major != MMC_BLOCK_MAJOR) >> + return NULL; > > The major is a dangerous check as we have all kinds of ways to override > it. Please check the block device operations as they must be unique. > Alright, thank you for the suggestion.