• Thomas Horsten's avatar
    [SCSI] MegaRAID driver management char device moved to misc · 90a95af8
    Thomas Horsten authored
    The MegaRAID driver's common management module (megaraid_mm.c) creates a
    char device used by the management tool "megarc" from LSI Logic (and
    possibly other management tools).
    
    In 2.6 with udev, this device doesn't get created because it is not
    registered in sysfs.
    
    I first fixed this by registering a class "megaraid_mm", but realized that
    this should probably be moved to misc devices, instead of taking up a char
    major.  This is because only 1 device is used, even if there are multiple
    adapters - the minor is never used (the adapter info is in the ioctl block
    sent to the driver, not detected based on the minor number as one might
    think).  So it is a complete waste to have an entire major taken by this.
    
    So it now uses a misc device which I named "megadev0" (the name that megarc
    expects), and has a dynamic minor (previoulsy a dynamic major was used).
    
    I have tested this on my own system with the megarc tool, and it works just
    as fine as before (only now the device gets created correctly by udev).
    Acked-by: default avatar"Patro, Sumant" <Sumant.Patro@lsi.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
    90a95af8
megaraid_mm.c 26.3 KB