settings and is an older version of the same design used for ICH SpeedStep.
It is only known to be available on PIIX4 chipsets.
Many thanks to Bruno Ducrot for writing the driver and Jon Noack for
testing.
Submitted by: Bruno Ducrot
Fix a race condition between kern_wait() and thread_stopped().
Problem is in kern_wait(), parent process steps through children list,
once a child process is skipped, and later even if the child is stopped,
parent process still sleeps in msleep(), the race happens if parent
masked SIGCHLD.
Submitted by : Peter Edwards peadar.edwards at gmail dot com
MFC after : 4 days
Problem is in kern_wait(), parent process steps through children list,
once a child process is skipped, and later even if the child is stopped,
parent process still sleeps in msleep(), the race happens if parent
masked SIGCHLD.
Submitted by : Peter Edwards peadar.edwards at gmail dot com
MFC after : 4 days
into _bus.h to help with name space polution from including all of bus.h.
In a few days, I'll commit changes to the MI code to take advantage of thse
sepration (after I've made sure that these changes don't break anything in
the main tree, I've tested in my trees, but you never know...).
Suggested by: bde (in 2002 or 2003 I think)
Reviewed in principle by: jhb
While we wait for holds to be released, print a list of who holds us
back once per second.
Use the new KPI from GEOM instead of vfs_mount.c calling g_waitidle().
Use the new KPI also from ata.
With ATAmkIII's newbusification, ata could narrowly miss the window
and ad0 would not exist when we tried to mount root.
mac_check_proc_wait(), which control the ability to wait4() specific
processes. This permits MAC policies to limit information flow from
children that have changed label, although has to be handled carefully
due to common programming expectations regarding the behavior of
wait4(). The cr_seeotheruids() check in p_canwait() is #if 0'd for
this reason.
The mac_stub and mac_test policies are updated to reflect these new
entry points.
Sponsored by: SPAWAR, SPARTA
Obtained from: TrustedBSD Project
dc0: MII without any PHY!
We have to enable the connection to the MII first. Doing so fixes the
problem cards without breaking the older, working cards.
Bad card provided by: deischen
- ncr53c9x.c:
1.108: Remove unreachable break after return and goto statements.
1.109: avoid strong words; use 'screw' instead
1.110: Fix some typos. From Tom Cosgrove via jmc@openbsd.
1.114: nuke trailing whitespace
1.107 was already merged, 1.112 and 1.113 are not relevant for FreeBSD.
1.111 is a functional change and will be merged later.
- ncr53c9xreg.h:
1.12: DMA, not dma nor Dma.
1.13: Fix some typos. From Tom Cosgrove via jmc@openbsd.
1.14: nuke trailing whitespace
- ncr53c9xvar.h:
1.43: Fix some typos. From Tom Cosgrove via jmc@openbsd.
1.44: Constify.
1.42 and 1.46 were already merged, 1.45 is not relevant for FreeBSD.
- Merge esp_sbus.c rev. 1.31 from NetBSD: nuke trailing whitespace.
Rev. 1.28 and 1.30 were already merged, 1.29 is not relevant for FreeBSD.
- Remove unused headers.
- Use BUS_PROBE_DEFAULT.
- Use __func__ instead of hardcoded function names in error messages.
- Correct some comments.
- Correct some function declarations to match their prototypes.
- Some style(9) fixes (don't use function calls in initializers; indentation).
- Zero the allocated structs to avoid problems with uninitialized members.
- Remove the ifdef'ed out SBus interrupt priority code and the hook for
ncr53c9x_reset(), remove the unused SBus interrupt priority member from
esp_softc. On FreeBSD setting the SBus interrupt priority is entirely done
in sbus(4) and the reset function isn't even really used in NetBSD.
- s,dma,DMA, in comments.
- Make the code fit in 80 columns.
- Merge lsi64854.c rev. 1.25 from NetBSD: nuke trailing whitespace.
- Update NetBSD RCS IDs according to what was actually already merged.
- Remove dv_name from the lsi64854_softc and use device_printf() instead.
- Use __func__ instead of hardcoded function names in error messages.
- Use ulmin() instead of min() for comparing the DMA sizes as the values
involved actually are represented by 64bit unsigned instead of 32bit
unsigned. As far as I can't tell this doesn't make a difference in
practice though.
- Some style(9) fixes (mainly indentation).
- Remove unnecessary braces.
to see if additional write requests will arrive that can be coalesced and
clustered with earlier ones. When doing so, it must determine whether
the two requests are made by credentials with the same access writes, so
as not to coalesce improperly. NFSW_SAMECRED() implements a test of two
credentials using a binary compare.
Replace NFSW_SAMECRED() macro with nfsrv_samecred() function, which is
aware of the contents and layout of a struct ucred, rather than a simple
binary compare. While the binary compare works when ucred is simply a
zero'd and embedded 'struct ucred' in the NFS descriptor, it will work
less well when the ucred associated with an NFS descriptor is "real", so
has defined and populated reference count, mutex, etc.
MFC after: 1 week
Obtained from: TrustedBSD Project
this buffer anyway so the constraint that it had to be DMA capable only
caused pain when devices failed to aquire the memory. Use a regular
malloc instead with sndbuf_setup.
Approved by: tanimura (mentor)
at their old location in sys/dev/esp after they were repo-copied to
sys/sparc64/sbus at rev. 1.1:
sys/dev/esp/lsi64854.c rev. 1.2
sys/dev/esp/lsi64854var.h rev. 1.2
Add some style(9) touch ups; style(9) states that new code should follow
these conventions and, well, this is a new driver.
Tested on: i386, sparc64
Reviewed by: scottl
with the attaching of the children done in the bus attach function like
it's supposed to be.
- In the bus probe nomatch function print the resources of the children
like it's done in the other sparc64 specific bus drivers.
- For the clock frequency IVAR use the per-child values and fall back to
the bus default in case a child doesn't have the respective property
instead of always using the bus default so a child driver doesn't need
to obtain the per-child value itself (see also the commit message of
sys/dev/esp/esp_sbus.c rev. 1.7).
- Add support for pass-through allocations. The comment preceding
sbus_alloc_resource() wasn't quite correct, we need to support pass-
through allocations for the 'espdma' and 'ledma' (pseudo-)busses which
hang off of the SBus in Ultra 1 machines. There can also be actual
bridges like the SBus-to-PCMCIA bridge on the SBus and the XBox (SBus
extension box) probably also involves one.
- Use auto-generated typedefs for the prototypes of the device interface
functions.
- Style(9) fixes (mainly don't use function calls in initializers).
- Use __func__ instead of hardcoded function names in error messages.
- Try to make error messages sound uniform.
- Try to keep the code within 80 columns.
- Correct some typos.
- Correct some function declarations to match their prototypes.
- Remove unused headers, macros and variables.
- Remove a bzero() superfluous due to allocating with M_ZERO.
- Use FBSDID.
Since the name cache is case-sensitive and msdosfs isn't,
creating a file 'foo' won't invalidate a negative entry for 'FOO'.
There are similar problems related to 8.3 filenames.
A better solution is to override VOP_LOOKUP with a method that
canonicalizes the name, then calls vfs_cache_lookup(). Unfortunately,
it's not quite that simple because vfs_cache_lookup() will call
msdosfs_lookup() on a cache miss, and msdosfs_lookup() needs a way to
get at the original component name.
control socket poll() (select()), fstat(), and accept() operations,
required for some policies:
poll() mac_check_socket_poll()
fstat() mac_check_socket_stat()
accept() mac_check_socket_accept()
Update mac_stub and mac_test policies to be aware of these entry points.
While here, add missing entry point implementations for:
mac_stub.c stub_check_socket_receive()
mac_stub.c stub_check_socket_send()
mac_test.c mac_test_check_socket_send()
mac_test.c mac_test_check_socket_visible()
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
of the socket label to thread-local storage, and replace it with
conditional acquisition based on debug.mpsafenet. Acquire the socket
lock around the copy operation.
In mac_set_fd(), replace the unconditional acquisition of Giant with
the conditional acquisition of Giant based on debug.mpsafenet. The socket
lock is acquired in mac_socket_label_set() so doesn't have to be
acquired here.
Obtained from: TrustedBSD Project
Sponsored by: SPAWAR, SPARTA
Don't use atomic ops to increment interrupt stats.
On sparc64 this reduces delay until tick interrupts are service by 1/10th
on average. In turn this reduces the clock drift caused by these delays
so there's less drift which has to be compensated in tick_hardclock().
This includes switching from atomically incrementing the global cnt.v_intr
to the asm equivalent of PCPU_LAZY_INC(cnt.v_intr) in exception.S
- Correct some comments to match the registers actually used.
- Correct some format specifiers, interrupt levels passed in are u_int.
- Use FBSDID.
Ok'ed by: jhb
- Fix NULL pointer dereferences caused when an ithread or a handler is
NULL which happens when a stray interrupt triggers after the respective
device interrupt was torn down.
- Remove the critical section around INTR_FAST handlers which actually
was a nested critical section. Both tl0_intr() and tl1_intr() already
enter a critical section for calling intr_execute_handlers().
MFC after: 3 days
call tick_stop() again after tick_init() as tick interrupts already
have been disabled as part of tick_init().
- In spinlock_enter() replace the magic value for PIL TICK with the
respective macro.
- Use FBSDID.
SpitFire erratum #54) which can cause writes to the TICK_CMPR register
to fail. This seems to fix the dying clocks problem reported by jhb@
and kris@. [1]
- In tick_start() don't reset the tick counter of the boot processor to
zero. It's initially reset in _start() and afterwards but _before_
tick_start() is called on the BSP the APs synchronise with the tick
counter of the BSP in mp_startup(). Resetting the tick counter of the
BSP in tick_start() probably also was the cause of problems seen when
using the CPU tick counter as timecounter on SMP machines.
Not resetting the tick counter of the BSP in mp_startup() makes the
tick counters and tick interrupts between the BSP and APs be pretty
much in sync as it's supposed to be. This also means there's no longer
a real reason to have separate tick_start() and tick_start_ap() so
merge them and zap tick_start_ap(). This is also a first step in
simplifying the interface to the tick counters in preparation to use
alternate clock hardware where available.
- Switch to the algorithm used on FreeBSD/ia64 for updating the tick
interrupt register and which compensates the clock drift caused by
varying delays between when the tick interrupts actually trigger and
when they are serviced. Not compensating the clock drift mainly hurts
interactive performance especially when using WITNESS. [2]
For further information about the algorithm also see the commit log
of sys/ia64/ia64/interrupt.c rev. 1.38.
On sparc64 the sysctls for monitoring the behaviour of the tick
interrupts are machdep.tick.adjust_edges, machdep.tick.adjust_excess,
machdep.tick.adjust_missed and machdep.tick.adjust_ticks.
- In tick_init() just use tick_stop() for stopping the tick interrupts
until a proper handler is set up later. This also stops the system
tick interrupt on USIII systems earlier.
- In tick_start() check for a rough upper limit of HZ.
- Some minor changes, e.g. use FBSDID, remove unused headers, etc.
Info obtained from: Linux [1]
Ok'ed by: marcel [2]
Additional testing by: kris (earlier version of the workaround), jhb
X-MFC after: 3 days [1]
of system calls to manipulate elements of the process credential,
including:
setuid() mac_check_proc_setuid()
seteuid() mac_check_proc_seteuid()
setgid() mac_check_proc_setgid()
setegid() mac_check_proc_setegid()
setgroups() mac_check_proc_setgroups()
setreuid() mac_check_proc_setreuid()
setregid() mac_check_proc_setregid()
setresuid() mac_check_proc_setresuid()
setresgid() mac_check_rpoc_setresgid()
MAC checks are performed before other existing security checks; both
current credential and intended modifications are passed as arguments
to the entry points. The mac_test and mac_stub policies are updated.
Submitted by: Samy Al Bahra <samy@kerneled.org>
Obtained from: TrustedBSD Project
than defaulting the cmode argument to vn_open() to 0. Supply a default
argument of ALQ_DEFAULT_CMODE (0600) in current callers.
Discussed with/pointed out by: hmp
Reveiwed by: jeff, hmp
MFC after: 3 days
unw_step(). Both errors denote the end of a stack trace (i.e. no
prior frame), but are otherwise not error conditions.
Have db_trace() return 0 when the trace ends due to one of these
return codes as they are really normal termination conditions.
This change especially improves the output of the "show thread"
command in DDB when there are threads in fork_trampoline() and
previously db_trace() would return an error, causing the show
command to emit '***'.
- Split core DRM routines back into their own module, rather than using the
nasty templated system like before.
- Development-class R300 support in radeon driver (requires userland pieces, of
course).
- Mach64 driver (haven't tested in a while -- my mach64s no longer fit in the
testbox). Covers Rage Pros, Rage Mobility P/M, Rage XL, and some others.
- i915 driver files, which just need to get drm_drv.c fixed to allow attachment
to the drmsub device. Covers i830 through i915 integrated graphics.
- savage driver files, which should require minimal changes to work. Covers the
Savage3D, Savage IX/MX, Savage 4, ProSavage.
- Support for color and texture tiling and HyperZ features of Radeon.
Thanks to: scottl (much p4 handholding)
Jung-uk Kim (helpful prodding)
PR: [1] kern/76879, [2] kern/72548
Submitted by: [1] Alex, lesha at intercaf dot ru
[2] Shaun Jurrens, shaun at shamz dot net
than WIN_CHARS bytes, we shift the suffix (previous substrings) upwards
by the amount this substring exceeds its WIN_CHARS slot. Profiling shows
this change is indistinguishable from the previous code at 95% confidence.
This bug would result in attempts to access or create files or directories
with multi-byte characters returning an error but no data loss.
Reported and tested by: avatar
MFC after: 3 days
of physical addresses. The pages containing these physical addresses will
not be added to the free list and thus will effectively be ignored by the
VM system. This is mostly useful for the case when one knows of specific
physical addresses that have bit errors (such as from a memtest run) so
that one can blacklist the bad pages while waiting for the new sticks of
RAM to arrive. The physical addresses of any ignored pages are listed in
the message buffer as well.
This allows to attach to the children (ATA devices) even without a
driver being attached. This allows atapi-cam to do its work both
with and without the pure ATAPI driver being present.
ATA patches by /me
ATAPI-cam pathes by Thomas
IPv6 support. The header in IPv6 is more complex then in IPv4 so we
want to handle skipping over it in one location.
Submitted by: Mariano Tortoriello and Raffaele De Lorenzo (via luigi)
MCA state requires a spin lock, which requires a valid curthread.
This change allows SMP kernels to boot into multi-user again.
While here, update the copyright notice and use __FBSDID for the
revision string.
in flight in SACK recovery.
Found by: Noritoshi Demizu
Submitted by: Mohan Srinivasan <mohans at yahoo-inc dot com>
Noritoshi Demizu <demizu at dd dot ij4u dot or dot jp>
Raja Mukerji <raja at moselle dot com>
disabling interrupts before updating the saved pil in the thread. If we
save the value first then it can be clobbered if an interrupt comes in
and the interrupt handler tries to acquire a spin lock.
Submitted by: marius
Specifically, if the BIOS has programmed an IRQ for a device that doesn't
match the list of valid IRQs for the link, use it anyway as some BIOSes
don't correctly list the valid IRQs in the $PIR. Also, allow the user
to specify an IRQ that $PIR claims is invalid as an override, but emit a
warning in that case.
when using an APIC. This simplifies the APIC code somewhat and also allows
us to be pedantically more compliant with ACPI which mandates no use of
mixed mode.
printf's during a verbose boot is more intuitive (the BAR listings and
interrupt routing info now comes after the config header dump rather than
just before it).
MAP_SHARED so that the entry point gets executed un-conditionally.
This may be useful for security policies which want to perform access
control checks around run-time linking.
-add the mmap(2) flags argument to the check_vnode_mmap entry point
so that we can make access control decisions based on the type of
mapped object.
-update any dependent API around this parameter addition such as
function prototype modifications, entry point parameter additions
and the inclusion of sys/mman.h header file.
-Change the MLS, BIBA and LOMAC security policies so that subject
domination routines are not executed unless the type of mapping is
shared. This is done to maintain compatibility between the old
vm_mmap_vnode(9) and these policies.
Reviewed by: rwatson
MFC after: 1 month
Save a memory dereference in the ISR by passing this in directly.
Calling pps_capture is MP safe for all other operations on struct
pps_state, so there's no need to aquire the lock before we do this,
even from a fast ISR. Avoid dereferencing sc->ppbus until after
pps_capture is called as well. These actions reduce somewhat the
cache effects that cause variance in interrupt times. On an
especially slow test machine (300MHz Cyrix GXm), this reduces the
interrupt latency about about 10% (from 21us to 19us) and helps a
little with the variance (although most of the variance seems to be
caused by lots of interrupt masking).
This also happens fixes one or two of bde's style issues.
i.e. checking to see if a cluster was every less than 48 bytes,
a rather unlikely case.
Check return value of m_dup_pkthdr() calls.
Found by: Coverity
Reviewed by: rwatson (mentor), Keiichi Shima (for Kame)
Approved by: rwatson (mentor)
we start turning any of them back on again. This works around a bug in
some BIOSen that alias two different link devices for APIC vs ATPIC modes
onto the same physical hardware link.
Submitted by: njl
Tested by: Antoine Brodin antoine dot brodin at laposte dot net
Specifically, sleepq_broadcast() uses td_slpq for its private pending
queue of threads that it is going to wake up after it takes them off the
sleep queue. The problem is that if one of the threads is actually not
asleep yet, then we can end up with td_slpq being corrupted and/or the
thread being made runnable at the wrong time resulting in the td_sleepqueue
== NULL assertion failures occasionally reported under heavy load.
The fix is to stop being so fancy and ditch the whole pending queue bit.
Instead, sleepq_remove_thread() and sleepq_resume_thread() were merged
into one function that requires the caller to hold sched_lock. This
fixes several places that unlocked sched_lock only to call a function
that then locked sched_lock, so even though sched_lock is now held
slightly longer, removing the extra lock acquires (1 pair instead of 3
in some cases) probably makes it an overall win if you don't include the
fact that it closes a race. This is definitely a 5.4 candidate.
PR: kern/79693
Submitted by: Steven Sears stevenjsears at yahoo dot com
MFC after: 4 days
was satisified for the rest of the kernel on the i386 build except for
these two files. Rather than adding a submarine include to pcb.h, I've
added proc.h here.
I forgot to include these with the original commit. Sorry folks.
period value. I suppose the BT adapter driver should be
fixed, but more importantly we should protect against
dividing by zero.
PR: kern/75603
MFC after: 1 week
of the kernel address space already. Intel recommend this anyway, because
using a non-4GB limit adds an additional clock cycle to address generation.
We were able to install 4GB segments into the LDT, so any limits we imposed
on %cs and %ds were academic anyway. More importantly, this allows us to
make a page in the kernel readable to user applications, for holding things
like the signal trampoline and other fun things.
Move the user %cs/%ds segments from the LDT to the GDT. There was no good
reason for them to be there anyway. The old LDT entries are still there
but we can now relax the restriction that prevented users from emptying
the default LDT entries.
Putting user and kernel %cs and %ds together allows us to access the fast
sysenter/sysexit/syscall/sysret instructions. syscall/sysret in particular
require that the user/kernel segments be laid out this way. Reserve a slot
specifically for NDIS while here.
Create two user controllable slots in the GDT that are context switched
with the (kernel) thread. This allows user applications to set two
user privilige selectors to arbitary values. Create
i386_set_fsbase(void *base) and friends. (get/set, fs/gs). For i386,
%gs is used by tls and the thread libraries and this means that user
processes no longer have to have the cost of having a custom LDT, and
we will no longer to do a ldt switch when activating a kthread/ithread in
the usual case any more.
In other words, we can now set the base address for %fs and %gs to arbitary
addresses without the pain of messing with ldt segments.
of the __pcb_spare longs. Except that fields were changed and one of the
spare values was used and the __pcb_spare field was reduced from two to one
long. Now VM86 bios calls can trash the first 4 bytes of the next page
following the kernel stack/pcb. This Is Bad(TM). This bug has been
present in 5.2-release and onwards, and is still in RELENG_5.
Instead of tempting fate and trying to use "spare" fields, explicitly
reserve them.
pcib_route_interrupt interface. Since there's only one interrupt pin
in the CardBus form factor, everybody gets to share it. Implement
cbb_route_interrupt to return the interrupt we have.
Suggested by: bms
Otherwise, busses that implement the pcib interface that forget to
implement pcib_route_interrupt would return EIO, which the caller
interprets as 'use interrupt 6'. This is likely the cause of much of
the grief that we had when I enabled power modes for the cardbus
bridge, since the card needed to reroute the interrupt to it and it
was getting 6 which was d by the pccbb sanity checks.
Also, move the -I stuff to the centralized kern.pre.mk. However, it
might be better to add these flags to files.conf. This is a short
term fix to fix the broken builds on my machine (I don't have a valid
/sys link).
guard against NULL t_modem entry. Otherwise, driver doesn't have t_modem
callback implemented(such like sys/dev/usb/ucycom.c) would panic when
someone opens the driver's associated tty device.
Reviewed by: phk, sam (mentor)
case. There are bugs in some which didn't unlock in the ISDOTDOT case
to begin with that need to be addressed seperately. This simplifies
things anyway.
- Fix relookup() to prevent it from vrele()'ing the dvp while the vp
is locked. Catch up to other lookup changes.
Sponsored by: Isilon Systems, Inc.
Reported by: Peter Wemm
Enhanced SpeedStep (that is, a follow-up of it called Foxton). Until
we actually have support for that, we build to catch regressions in
the framework.
Triggered by: njl
- Add unp_addsockcred() (for LOCAL_CREDS).
- Add an argument to unp_connect2() to differentiate between
PRU_CONNECT and PRU_CONNECT2. (for LOCAL_CONNWAIT)
Obtained from: NetBSD (with some changes)
3ware's 9xxx series controllers. This corresponds to
the 9.2 release (for FreeBSD 5.2.1) on the 3ware website.
Highlights of this release are:
1. The driver has been re-architected to use a "Common Layer"
(all tw_cl* files), which is a consolidation of all OS-independent
parts of the driver. The FreeBSD OS specific portions of the
driver go into an "OS Layer" (all tw_osl* files).
This re-architecture is to achieve better maintainability, consistency
of behavior across OS's, and better portability to new OS's (drivers
for new OS's can be written by just adding an OS Layer that's specific
to the OS, by complying to a "Common Layer Programming Interface" API.
2. The driver takes advantage of multiple processors.
3. The driver has a new firmware image bundled, the new features of which
include Online Capacity Expansion and multi-lun support, among others.
More details about 3ware's 9.2 release can be found here:
http://www.3ware.com/download/Escalade9000Series/9.2/9.2_Release_Notes_Web.pdf
Since the Common Layer is used across OS's, the FreeBSD specific include
path for header files (/sys/dev/twa) is not part of the #include pre-processor
directive in any of the source files. For being able to integrate twa into
the kernel despite this, Makefile.<arch> has been changed to add the include
path to CFLAGS.
Reviewed by: scottl
1 Move the debug.clock_adjust_* sysctls to debug.clock.adjust_* to
make it easier to get only the clock statistics.
2 Make the sysctls read-only [suggested by Marius].
3 When determining the new clock adjustment, we checked for an error
either larger than 12.5% or smaller than 12.5%. We left out an error
of exactly 12.5%. For errors larger than 12.5% we adjust the clock
reload value in such a way that the next clock interrupt would be
early (as in premature). For errors less than 12.5% we stopped the
adjustment.
The current algorithm doesn't benefit from excluding an error of
exactly 12.5%. Change the code to stop adjusting the clock if the
error is *not* larger than 12.5% [suggested by Marius].
Discussed with: marius@
o don't pre-assign key index to the global key table entries so device
has a chance to decide what to use
o make ieee80211_crypto_newkey take the desired flags as an argument
instead of wacking the key structure directly; this eliminates a
bunch of code warts
o add a new flag IEEE80211_KEY_GROUP to indicate a key is a WPA Group
key so devices don't need to guess (temporarily add this flag in the
ioctl code until we can get wpa_supplicant+hostapd updated)
o shuffle IEEE80211_KEY_* bits to move flags used internally to the high
nibble of the flags word
Reviewed by: Tai-hwa Liang
problems here, it became clear we were being too complex.
o Don't keep track of resources in two places
o Use resource_list_purge instead of rolling our own
o Just reassign the ownership of the resource, rather than freeing it
and reallocating it.
o Fix compile problems when sizeof(u_long) != sizeof(int)
in BSD and MBR classes, ie. if provider below us uses the same metadata,
don't create labels based on the metadata.
This allows to create labels on geoms with rank != 1 without hacks.
Tested by: Chris Elsworth <chris@shagged.org> on sparc64
OK'ed by: phk
MFC after: 2 weeks
this code:
o rid is stored in the resource, so don't bother keeping track of it here.
o Implement memory space
o Don't try to activate 'memory card' CFEs. This is type memory, as opposed
to the memory resource.
resource_list_find. Check to make sure that rle is not NULL and panic
if it is (but it appears that resource_list_add already panics, so I'm
not entirely sure it is necessary now).
Add a test to make sure we have a interrupt resource when we're
disabling it. This is also a cannot happen, but the extra care
shoudln't hurt.
Found by: Coventry tool via sam@
whether or not the receive pipe is stopped. This ensures that we
do not attempt to start the same transfer twice, and it allows
ucomstop() to skip the restarting of the read pipe if it was not
originally running, such as when called indirectly from ucomreadcb().
PR: kern/79420
MFC after: 1 day
