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8c2381af0d
linux/drivers/tty
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Hendrik Brueckner 8c2381af0d hvc_console: Improve tty/console put_chars handling 
Currently, the hvc_console_print() function drops console output if the
hvc backend's put_chars() returns 0.  This patch changes this behavior
to allow a retry through returning -EAGAIN.

This change also affects the hvc_push() function.  Both functions are
changed to handle -EAGAIN and to retry the put_chars() operation.

If a hvc backend returns -EAGAIN, the retry handling differs:

  - hvc_console_print() spins to write the complete console output.
  - hvc_push() behaves the same way as for returning 0.

Now hvc backends can indirectly control the way how console output is
handled through the hvc console layer.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Acked-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-07-19 15:13:05 +10:00
..
hvc hvc_console: Improve tty/console put_chars handling 2011-07-19 15:13:05 +10:00
ipwireless Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6 2011-05-24 13:28:35 -07:00
serial Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-06-28 11:14:55 -07:00
vt Revert "tty: make receive_buf() return the amout of bytes received" 2011-06-04 06:33:24 +09:00
amiserial.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
bfin_jtag_comm.c drivers/tty/bfin_jtag_comm.c: avoid calling put_tty_driver on NULL 2011-03-23 19:46:39 -07:00
cyclades.c Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
isicom.c tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
Kconfig n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
Makefile n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
moxa.c drivers/tty/moxa.c: Put correct tty value 2011-04-29 14:17:45 -07:00
moxa.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
mxser.c tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
mxser.h Fix common misspellings 2011-03-31 11:26:23 -03:00
n_gsm.c tty: n_gsm: improper skb_pull() use was leaking framed data 2011-06-16 12:00:15 -07:00
n_hdlc.c Revert "tty: make receive_buf() return the amout of bytes received" 2011-06-04 06:33:24 +09:00
n_r3964.c Revert "tty: make receive_buf() return the amout of bytes received" 2011-06-04 06:33:24 +09:00
n_tracerouter.c n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tracesink.c n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tracesink.h n_tracerouter and n_tracesink ldisc additions. 2011-05-13 16:31:00 -07:00
n_tty.c TTY: ntty, add one more sanity check 2011-06-07 10:36:47 -07:00
nozomi.c Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
pty.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
rocket_int.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
rocket.c TTY: rocket, remove unused variables 2011-04-19 14:41:48 -07:00
rocket.h tty: move a number of tty drivers from drivers/char/ to drivers/tty/ 2011-02-22 16:14:56 -08:00
synclink_gt.c Fix common misspellings 2011-03-31 11:26:23 -03:00
synclink.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
synclinkmp.c Fix common misspellings 2011-03-31 11:26:23 -03:00
sysrq.c lib, arch: add filter argument to show_mem and fix private implementations 2011-03-24 17:49:37 -07:00
tty_audit.c tty_audit: fix tty_audit_add_data live lock on audit disabled 2011-03-07 12:04:50 -08:00
tty_buffer.c tty_buffer: get rid of 'seen_tail' logic in flush_to_ldisc 2011-06-08 07:46:30 -07:00
tty_io.c TTY: tty_io, annotate locking functions 2011-04-25 14:19:12 -07:00
tty_ioctl.c Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2011-05-23 12:23:20 -07:00
tty_ldisc.c TTY: ldisc, do not close until there are readers 2011-06-07 10:16:54 -07:00
tty_mutex.c tty: remove invalid location line in file header 2011-04-19 16:33:36 -07:00
tty_port.c