Only clear the IFF_OACTIVE flag when we have a chance of being able
to queue a packet to the hardware, instead of when the hardware queue
is empty, and fix up handling and prodding of the tx.
These fixes clear up an occasional "sk0: watchdog timeout" from the
on-board ethernet on my Asus A8V motherboard.
OK christos@
message. In such case we would not update resid with the proper value
(eventually resid would not be updated at all if there was only one data
phase). To fix this, have the script save the offset in the data tables at
disconnect time if there was a transfer, and use this to compute the resid
if the current offset is 0.
Problem reported and patch tested by edwin, Roy Bixler and YAMAMOTO Takashi.
Fix kern/31990 by YAMAMOTO Takashi.
o Intel 82801FBM ICH6M LPC Interface Bridge
o Intel 82801FB/FR PCI Express Port #2
o TI PCIxx21/x515 Cardbus Controller
o TI PCI7x21/7x11 IEEE 1394 Host Controller
o TI PCIxx11/21 Integrated FlashMedia Controller
Each call to the FreeBSD bge_start() routine the transmit producer
pointer index from the chip mailbox register BGE_MBX_TX_HOST_PROD0_LO.
The local copy of that value is then updated by bge_encap() as
bge_encap() encapsulates packets in the Tx ring. If bge_encap()
succeds in encpuslating one or more packets, bge_start() tells the
chip to start sending the newly-encinitiates writes the new value back
to the chip mailbox register.
However, comparison of the Linux drivers (Broadcom-supplied and
open-source tg3.c) and to the OpenSolaris driver confirms that
register BGE_MBX_TX_HOST_PROD0_LO is write-only to software.
Thus, we can just keep a copy in the softc, and eliminate the
(expensive) PCI register write on each call to bge_start().
``Make it so''.
instead of setting it to zero. Otherwise nothing ever sets it unless some code
explicitly changes the baud rate. For a serial console (in particular) we want
to use the baud rate set by the bios (or whatever) and used by theboot code.
This is the way it was before a 'new version of com driver' was added in 1997 (rev 1.99)
shouldn't claim it either, but a buggy software shouldn't be able to crash
the kernel anyway). Should fix port-sparc64/31925 by Johan A.van Zanten
(which should really be kern/31925).
Analysed and patch tested by Martin Husemann.
in some drivers including wd and scsi.
- physio: if a caller provided a buf, stick to use it
because some drivers use it as an identifier.
- sprinkle simple_locks.
- scsistrategy: rather than issueing an async request and
waiting for its completion, simply issue a sync request.
the way to wait for the completion had an assumption that
B_CALL is never used. it isn't the case after the recent
physio() changes.
pointed/analyzed/tested by Martin Husemann.
augustss