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eda0cd3546
linux/drivers/tty
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John Ogness eda0cd3546 tty: serial: 8250: omap: synchronize rx_running 
The rx_running flag should show if DMA is currently active. However
there is a window between when the flag is set/cleared and when
the DMA is started/stopped. Because the flag is queried from both
hard and soft irq contexts, the driver can make incorrect
decisions and do things like start a DMA transfer using a buffer
that is already setup to be used for a DMA transfer.

This patch adds a spinlock to synchronize the rx_running flag and
close the above mentioned window.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-06 22:27:01 +02:00
..
hvc tty/hvc_opal: constify of_device_id array 2015-03-26 22:49:10 +01:00
ipwireless Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
serial tty: serial: 8250: omap: synchronize rx_running 2015-05-06 22:27:01 +02:00
vt tty: Use static attribute groups for sysfs entries 2015-03-26 16:10:10 +01:00
amiserial.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
bfin_jtag_comm.c TTY: bfin_jtag_comm: remove incorrect wait_until_sent operation 2015-03-07 03:44:14 +01:00
cyclades.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
ehv_bytechan.c tty: remove unused variable sprop 2015-02-03 15:52:13 -08:00
goldfish.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-04-14 09:50:27 -07:00
isicom.c tty/isicom: fix big-endian compile warning 2015-02-02 10:11:25 -08:00
Kconfig ttyFDC: Implement KGDB IO operations. 2015-03-31 12:04:13 +02:00
Makefile TTY: Add MIPS EJTAG Fast Debug Channel TTY driver 2015-03-31 12:04:12 +02:00
metag_da.c tty/metag_da: Add console_poll module parameter 2014-09-28 21:35:56 -04:00
mips_ejtag_fdc.c ttyFDC: Implement KGDB IO operations. 2015-03-31 12:04:13 +02:00
moxa.c TTY: fix decimal printf format specifiers prefixed with 0x 2014-09-08 15:51:35 -07:00
moxa.h
mxser.c
mxser.h
n_gsm.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
n_hdlc.c
n_r3964.c
n_tracerouter.c
n_tracesink.c
n_tracesink.h
n_tty.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
nozomi.c drivers/tty/nozomi.c: Use 'nozomi_setup_memory' instead of 'setup_memory' 2014-09-08 16:09:23 -07:00
pty.c n_tty: Fix signal handling flushes 2015-02-02 10:11:27 -08:00
rocket_int.h
rocket.c TTY: fix misspelling of current function in string 2015-01-09 14:38:15 -08:00
rocket.h
synclink_gt.c synclink_gt: use pci_zalloc_consistent 2014-08-08 15:57:30 -07:00
synclink.c tty: Remove tty_hung_up_p() tests from tty drivers' open() 2014-07-10 16:06:49 -07:00
synclinkmp.c tty: Remove tty_hung_up_p() tests from tty drivers' open() 2014-07-10 16:06:49 -07:00
sysrq.c workqueue: dump workqueues on sysrq-t 2015-03-09 09:22:28 -04:00
tty_audit.c
tty_buffer.c pty: Fix buffer flush deadlock 2015-02-02 10:11:27 -08:00
tty_io.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
tty_ioctl.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
tty_ldisc.c tty: remove buf parameter from tty_name() 2015-05-06 22:26:57 +02:00
tty_ldsem.c
tty_mutex.c tty: Make lock subclasses available for other tty locks 2015-02-02 10:11:27 -08:00
tty_port.c tty: Deletion of unnecessary checks before two function calls 2014-11-26 19:35:49 -08:00