From 91960a46c658b719c03fba80f1c60a96393bbcfd Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 14 Sep 2010 11:38:06 -0700 Subject: [PATCH] uio: Support 2^MINOR_BITS minors register_chrdev limits uio devices to 256 minor numbers which causes problems on one system I have with 384+ uio devices. So instead set UIO_MAX_DEVICES to the maximum number of minors and use alloc_chrdev_region to reserve the uio minors. The final result is that the code works the same but the uio driver now supports any minor the idr allocator comes up with. Signed-off-by: Eric W. Biederman Reviewed-by: Thomas Gleixner Signed-off-by: Hans J. Koch Signed-off-by: Greg Kroah-Hartman --- Reading git-format-patch failed