[Bug 1518] New: Bdbuf IO request cleanup

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1518

           Summary: Bdbuf IO request cleanup
           Product: RTEMS
           Version: 4.10
          Platform: All
        OS/Version: RTEMS
            Status: NEW
          Severity: normal
          Priority: P3
         Component: cpukit
        AssignedTo: joel.sherrill at oarcorp.com
        ReportedBy: sebastian.huber at embedded-brains.de


Reported by Chris Johns in Bug 1433:

We need to remove the SG alloc calls from the cache read code. The code
currently allocates a block of RAM on the stack with an array of pointers to
the BD. I consider the array of size of 1 at the end of the struct and the way
it is allocated as fragile code. The BD already contain a link node which is
not used at the driver layer. It would be much better to use a chain to hold a
list of BDs to fill.

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