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202dc3cc10
linux/drivers/tty
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Geert Uytterhoeven 202dc3cc10 serial: sh-sci: Fix receive on SCIFA/SCIFB variants with DMA 
On SCIFA and SCIFB serial ports with DMA support (i.e. some ports on
R-Car Gen2 and RZ/G1 SoCs), receive DMA operations are submitted before
the DMA channel pointer is initialized.  Hence this fails, and the
driver tries to fall back to PIO.  However, at this early phase in the
initialization sequence, fallback to PIO does not work, leading to a
serial port that cannot receive any data.

Fix this by calling sci_submit_rx() after initialization of the DMA
channel pointer.

Reported-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Fixes: 2c4ee23530 ("serial: sh-sci: Postpone DMA release when falling back to PIO")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-15 16:20:24 +02:00
..
hvc tty: hvc: hvc_write() fix break condition 2018-09-10 18:04:31 +02:00
ipwireless tty: ipwireless: Replace GFP_ATOMIC with GFP_KERNEL in ipwireless_network_create 2018-04-23 10:57:06 +02:00
serdev serdev: add dev_pm_domain_attach|detach() 2018-07-15 12:23:53 +02:00
serial serial: sh-sci: Fix receive on SCIFA/SCIFB variants with DMA 2018-10-15 16:20:24 +02:00
vt tty: vt_ioctl: fix potential Spectre v1 2018-09-18 15:51:30 +02:00
amiserial.c tty: replace ->proc_fops with ->proc_show 2018-05-16 07:24:30 +02:00
cyclades.c tty: replace ->proc_fops with ->proc_show 2018-05-16 07:24:30 +02:00
ehv_bytechan.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
goldfish.c headers: separate linux/mod_devicetable.h from linux/platform_device.h 2018-07-07 17:52:26 +02:00
isicom.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-09 09:04:10 -07:00
Makefile tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers 2018-03-26 15:57:24 +02:00
mips_ejtag_fdc.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
moxa.c tty: moxa: Add support for CMSPAR 2017-11-28 15:32:33 +01:00
moxa.h tty: moxa: Add support for CMSPAR 2017-11-28 15:32:33 +01:00
mxser.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
mxser.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
n_gsm.c Merge 4.17-rc3 into tty-next 2018-04-30 05:14:55 -07:00
n_hdlc.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_null.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_r3964.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
n_tracerouter.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tracesink.c tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tracesink.h tty: Remove redundant license text 2017-11-08 13:08:12 +01:00
n_tty.c n_tty: Access echo_* variables carefully. 2018-06-28 21:30:16 +09:00
nozomi.c tty/nozomi: fix inconsistent indentation 2018-04-25 14:54:26 +02:00
pty.c pty: fix O_CLOEXEC for TIOCGPTPEER 2018-07-21 09:08:47 +02:00
rocket_int.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rocket.c tty: rocket: Fix possible buffer overwrite on register_PCI 2018-08-02 10:11:32 +02:00
rocket.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
synclink_gt.c tty: replace ->proc_fops with ->proc_show 2018-05-16 07:24:30 +02:00
synclink.c tty: replace ->proc_fops with ->proc_show 2018-05-16 07:24:30 +02:00
synclinkmp.c tty: replace ->proc_fops with ->proc_show 2018-05-16 07:24:30 +02:00
sysrq.c signal: Pass pid type into do_send_sig_info 2018-07-21 12:57:35 -05:00
tty_audit.c audit: eliminate audit_enabled magic number comparison 2018-06-19 10:43:55 -04:00
tty_baudrate.c tty: support CIBAUD without BOTHER 2018-07-16 12:00:43 +02:00
tty_buffer.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_io.c tty: Drop tty->count on tty_reopen() failure 2018-09-18 15:42:24 +02:00
tty_ioctl.c tty: add missing const to termios hw-change helper 2018-05-22 10:08:05 +02:00
tty_jobctrl.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
tty_ldisc.c proc: introduce proc_create_seq{,_data} 2018-05-16 07:23:35 +02:00
tty_ldsem.c atomic/tty: Fix up atomic abuse in ldsem 2018-06-28 21:07:55 +09:00
tty_mutex.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tty_port.c tty: add SPDX identifiers to all remaining files in drivers/tty/ 2017-11-08 13:08:12 +01:00
vcc.c tty: vcc: Convert timers to use timer_setup() 2017-11-04 12:01:54 +01:00