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eced428604
freebsd-nq/sys
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Marcel Moolenaar eced428604 Fix hangs caused by z8530_bus_ipend() returning UART_IPEND_TXIDLE 
not as a pending interrupt status, but as a matter of status quo.
Consequently, when there's no data to be transmitted the condition
is not cleared and uart_intr() is stuck in an infinite loop trying
to clear the UART_IPEND_TXIDLE status.
The z8530_bus_ipend() function is changed to return idle only once
after having sent any data.

The root cause for this problem is that we cannot use the interrupt
status bits of the SCC itself. The register that holds the interrupt
status can only be accessed by channel A and holds the status for
both channels. Using the interrupt status register would complicate
the driver because we need to synchronize access to the SCC between
the channels.

Elementary testing: marius
2004-05-04 06:58:10 +00:00
..
alpha Add option GEOM_GPT. This brings the ability to have a large number of 2004-05-02 20:40:19 +00:00
amd64 Add option GEOM_GPT. This brings the ability to have a large number of 2004-05-02 20:40:19 +00:00
arm Remove advertising clause from University of California Regent's license, 2004-04-05 21:29:41 +00:00
boot Convert block comments into C-style that is understood by cpp(1). 2004-04-29 18:58:38 +00:00
cam Quirk for Neuros USB audio device. 2004-05-02 19:24:23 +00:00
coda
compat Small timer cleanups: 2004-04-30 20:51:55 +00:00
conf Remove new options and my prevention of system freeze when the sio probe 2004-05-03 22:35:28 +00:00
contrib Commit three imported bugfixes from OpenBSD 3.4-stable: 2004-05-02 20:47:24 +00:00
crypto
ddb Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
dev Fix hangs caused by z8530_bus_ipend() returning UART_IPEND_TXIDLE 2004-05-04 06:58:10 +00:00
fs Do not drop Giant around the poll method yet, we're not ready for it. 2004-04-12 21:52:52 +00:00
geom Turn off debugging by default. 2004-05-03 21:11:54 +00:00
gnu Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
i4b Convert callers to the new bus_alloc_resource_any(9) API. 2004-03-17 17:50:55 +00:00
i386 Increase BUS_SPACE_IAT_MAXSIZE to 33 for the ed driver. 2004-05-04 06:38:13 +00:00
ia64 Floating-point faults and exceptions can happen in the kernel too. 2004-05-03 04:13:31 +00:00
isa - The i8254 uses IRQ 0, not IRQ 8. Correct i8254_intsrc to reference the 2004-04-27 20:03:26 +00:00
isofs/cd9660 Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
kern Add /* !MAC */ to final #endif. 2004-05-03 22:54:46 +00:00
libkern Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
modules Connect geom_gate.ko to the build. 2004-05-03 21:12:29 +00:00
net Add route.h to pick up the rt_ifmsg() declaration. 2004-05-04 02:39:41 +00:00
net80211 Resolve the issue of whether frames have FCS or not. Frame data does not 2004-04-05 22:13:21 +00:00
netatalk This commit does two things: 2004-04-25 09:24:52 +00:00
netatm These are changes to allow to use the Intel C/C++ compiler (lang/icc) 2004-03-12 21:45:33 +00:00
netgraph Fix a memory leak in ng_get_string_token. A dynamically-allocated 2004-04-29 01:37:11 +00:00
netinet Switch to using the inpcb MAC label instead of socket MAC label when 2004-05-04 02:11:47 +00:00
netinet6 fix the change of interface in nd6_storelladdr for multicast 2004-04-26 20:31:46 +00:00
netipsec use correct address for SADB_EXT_ADDRESS_DST in key_do_allocsa_policy 2004-05-03 05:15:53 +00:00
netipx
netkey
netnatm
netncp Make the process_exit eventhandler run without Giant. Add Giant hooks 2004-03-14 02:06:28 +00:00
netsmb
nfs Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
nfs4client Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
nfsclient Let the NFS client notice a file's size changing as a modification. 2004-04-14 23:23:55 +00:00
nfsserver Don't send the available space as is in the FSSTAT call. Under 2004-04-12 13:02:21 +00:00
opencrypto kthread_exit() no longer requires Giant, so don't force callers to acquire 2004-03-05 22:42:17 +00:00
pc98 Oops, switch to using the moved cy driver for pc98 too (remove pointers 2004-05-03 16:03:41 +00:00
pccard Convert callers to the new bus_alloc_resource_any(9) API. 2004-03-17 17:50:55 +00:00
pci Remove old cy driver files. They have been repo-copied to sys/dev/cy and 2004-05-02 05:38:49 +00:00
posix4
powerpc Add option GEOM_GPT. This brings the ability to have a large number of 2004-05-02 20:40:19 +00:00
rpc Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
security If the mbuf pointer passed to mac_mbuf_to_label() is NULL, or the tag 2004-05-03 23:37:48 +00:00
sparc64 Add option GEOM_GPT. This brings the ability to have a large number of 2004-05-02 20:40:19 +00:00
sys Rename m_claim_next_hop() to m_claim_next(), as suggested by Max Laier. 2004-05-02 15:10:17 +00:00
tools Correct $FreeBSD$ style. 2004-04-16 05:22:11 +00:00
ufs Revert previous change to this file because it breaks some 2004-04-29 15:10:42 +00:00
vm Zero the physical page only if it is invalid and not prezeroed. 2004-04-25 07:58:59 +00:00
Makefile