kernel_optimize_test/include
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
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
asm-cris
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
asm-ia64 ACPI : Create "idle=nomwait" bootparam 2008-07-16 23:27:05 +02:00
asm-m32r
asm-m68k
asm-m68knommu
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
asm-parisc
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
asm-sparc
asm-sparc64
asm-um
asm-v850
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
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
linux Subject: [PATCH 1/2] serial: Add flush_buffer() operation to uart_ops 2008-07-20 17:12:34 -07:00
math-emu
media
mtd
net
pcmcia
rdma RDMA/addr: Keep pointer to netdevice in struct rdma_dev_addr 2008-07-14 23:48:53 -07:00
rxrpc
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
xen
Kbuild drm: reorganise drm tree to be more future proof. 2008-07-14 10:45:01 +10:00