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Haavard Skinnemoen 6bb0e3a59a Subject: [PATCH 1/2] serial: Add flush_buffer() operation to uart_ops 
Serial drivers using DMA (like the atmel_serial driver) tend to get very
confused when the xmit buffer is flushed and nobody told them.  They
also tend to spew a lot of garbage since the DMA engine keeps running
after the buffer is flushed and possibly refilled with unrelated data.

This patch adds a new flush_buffer operation to the uart_ops struct,
along with a call to it from uart_flush_buffer() right after the xmit
buffer has been cleared. The driver can implement this in order to
syncronize its internal DMA state with the xmit buffer when the buffer
is flushed.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2008-07-20 17:12:34 -07:00
..
acpi Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2008-07-16 17:25:46 -07:00
asm-alpha smp_call_function: get rid of the unused nonatomic/retry argument 2008-06-26 11:24:35 +02:00
asm-arm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2008-07-16 15:17:52 -07:00
asm-avr32 atmel-mci: Driver for Atmel on-chip MMC controllers 2008-07-15 14:14:49 +02:00
asm-blackfin Blackfin Serial Driver: Use timer to poll CTS PIN instead of workqueue. 2008-06-19 17:46:39 +08:00
asm-cris
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asm-frv frv: fix irqs_disabled() to return an int, not an unsigned long 2008-07-12 14:33:42 -07:00
asm-generic Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2008-07-16 17:25:46 -07:00
asm-h8300 h8300: fix typo in header guard 2008-06-06 11:29:12 -07:00
asm-ia64 ACPI : Create "idle=nomwait" bootparam 2008-07-16 23:27:05 +02:00
asm-m32r m32r: convert to generic helpers for IPI function calls 2008-06-26 11:22:57 +02:00
asm-m68k m68k: Add ext2_find_{first,next}_bit() for ext4 2008-06-12 18:05:39 -07:00
asm-m68knommu
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asm-mips Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc 2008-07-16 15:17:52 -07:00
asm-mn10300 MN10300: Fix typo in header guard 2008-05-28 07:59:06 -07:00
asm-parisc parisc: convert to generic helpers for IPI function calls 2008-06-26 11:22:57 +02:00
asm-powerpc Merge commit 'origin/master' 2008-07-16 11:07:59 +10:00
asm-s390 [S390] qdio: new qdio driver. 2008-07-17 17:22:10 +02:00
asm-sh sh: convert to generic helpers for IPI function calls 2008-06-26 11:22:58 +02:00
asm-sparc smp_call_function: get rid of the unused nonatomic/retry argument 2008-06-26 11:24:35 +02:00
asm-sparc64 fix "ftrace: store mcount address in rec->ip" 2008-07-01 17:46:14 +02:00
asm-um uml: activate_mm: remove the dead PF_BORROWED_MM check 2008-06-06 11:36:22 -07:00
asm-v850 v850: fix typo in header guard 2008-06-06 11:29:12 -07:00
asm-x86 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-07-17 10:38:59 -07:00
asm-xtensa asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
crypto crypto: hash - Move ahash functions into crypto/hash.h 2008-07-10 20:35:18 +08:00
drm drm/radeon: fixup issue with radeon and PAT support. 2008-07-15 15:48:05 +10:00
keys
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linux Subject: [PATCH 1/2] serial: Add flush_buffer() operation to uart_ops 2008-07-20 17:12:34 -07:00
math-emu
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media V4L/DVB (8092): videodev: simplify and fix standard enumeration 2008-06-26 15:58:57 -03:00
mtd
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net net-sched: change tcf_destroy_chain() to clear start of filter list 2008-07-01 19:52:38 -07:00
pcmcia pcmcia: (re)move {pcmcia,pccard}_get_status 2008-06-24 15:33:44 +02:00
rdma RDMA/addr: Keep pointer to netdevice in struct rdma_dev_addr 2008-07-14 23:48:53 -07:00
rxrpc
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scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-07-15 18:58:04 -07:00
sound ALSA: Release v1.0.17 2008-07-14 09:54:43 +02:00
video
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xen xen: implement ptep_modify_prot_start/commit 2008-06-25 15:17:23 +02:00
Kbuild drm: reorganise drm tree to be more future proof. 2008-07-14 10:45:01 +10:00