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Michael Brown 97f0f56a34 [netdevice] Cancel all pending transmissions on any transmit error 
Some external code (such as the UEFI UNDI driver for the Realtek USB
NIC on a Microsoft Surface Book) will block during transmission
attempts and can take several seconds to report a transmit error.  If
there is a large queue of pending transmissions, then the accumulated
time from a series of such failures can easily exceed the EFI watchdog
timeout, resulting in what appears to be a system lockup followed by a
reboot.

Work around this problem by immediately cancelling any pending
transmissions as soon as any transmit error occurs.

The only expected transmit error under normal operation is ENOBUFS
arising when the hardware transmit queue is full.  By definition, this
can happen only for drivers that do not utilise deferred
transmissions, and so this new behaviour will not affect these
drivers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
 		2017-09-05 12:30:04 +01:00
contrib [coverity] Add Coverity user model 2017-03-22 16:46:03 +02:00
src [netdevice] Cancel all pending transmissions on any transmit error 2017-09-05 12:30:04 +01:00
.travis.yml [travis] Integrate with Coverity Scan 2017-03-23 10:51:25 +02:00
COPYING [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.GPLv2 [legal] Update GPLv2 licence text 2015-02-26 17:59:53 +00:00
COPYING.UBDL [legal] Add support for the Unmodified Binary Distribution Licence 2015-03-02 12:07:14 +00:00
README [doc] Re-add README file 2010-05-28 00:03:47 +01:00

README 

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org