[Bug 55961] New: PATCH: Disable write buffering on Toshiba ToPIC95

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Fri Mar 29 22:19:03 EDT 2013


           Summary: PATCH: Disable write buffering on Toshiba ToPIC95
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.8.4
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: PCMCIA
        AssignedTo: linux-pcmcia at lists.infradead.org
        ReportedBy: nemesis at icequake.net
        Regression: No

Created an attachment (id=96651)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=96651)
Disable write buffering on ToPIC95 if it is left enabled

Attached is a patch that will disable write buffering on the Toshiba ToPIC95 if
it is enabled by somebody (it is not supposed to be a power-on default
according to the datasheet).  On the ToPIC95, practically no 32-bit Cardbus
card will work under heavy load without locking up the whole system if this is
left enabled.  I tried about a dozen.  It does not affect 16-bit cards.  This
is similar to the O2 bugs in early controller revisions it seems.

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