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authorChristian Pellegrin <chripell@fsfe.org>2010-02-03 07:39:54 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-03 20:32:28 -0800
commitbf66f3736a945dd4e92d86427276c6eeab0a6c1d (patch)
tree997d7552463813e0855e77cd85e67c81bcfc6cbd /include
parent35cfabdc5e9b99e732899db8f36c63a215e105bc (diff)
downloadlinux-bf66f3736a945dd4e92d86427276c6eeab0a6c1d.tar.bz2
can: mcp251x: Move to threaded interrupts instead of workqueues.
This patch addresses concerns about efficiency of handling incoming packets. Handling of interrupts is done in a threaded interrupt handler which has a smaller latency than workqueues. This change needed a rework of the locking scheme that was much simplified. Some other (more or less longstanding) bugs are fixed: utilization of just half of the RX buffers, useless wait for interrupt on open, more reliable reset sequence. The MERR interrupt is not used anymore: it overloads the CPU in error-passive state without any additional information. One shot mode is disabled because it's not clear if it can be handled efficiently on this CAN controller. Signed-off-by: Christian Pellegrin <chripell@fsfe.org> Acked-by: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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