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63a8eef70c
linux/drivers/usb
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Johan Hovold 63a8eef70c USB: serial: cp210x: fix CP2102N-A01 modem control 
CP2102N revision A01 (firmware version <= 1.0.4) has a buggy
flow-control implementation that uses the ulXonLimit instead of
ulFlowReplace field of the flow-control settings structure (erratum
CP2102N_E104).

A recent change that set the input software flow-control limits
incidentally broke RTS control for these devices when CRTSCTS is not set
as the new limits would always enable hardware flow control.

Fix this by explicitly disabling flow control for the buggy firmware
versions and only updating the input software flow-control limits when
IXOFF is requested. This makes sure that the terminal settings matches
the default zero ulXonLimit (ulFlowReplace) for these devices.

Link: https://lore.kernel.org/r/20210609161509.9459-1-johan@kernel.org
Reported-by: David Frey <dpfrey@gmail.com>
Reported-by: Alex Villacís Lasso <a_villacis@palosanto.com>
Tested-by: Alex Villacís Lasso <a_villacis@palosanto.com>
Fixes: f61309d9c9 ("USB: serial: cp210x: set IXOFF thresholds")
Cc: stable@vger.kernel.org      # 5.12
Signed-off-by: Johan Hovold <johan@kernel.org>
2021-06-10 16:59:00 +02:00
..
atm drivers: usb: atm: use pr_err() and pr_warn() instead of raw printk() 2020-12-09 15:22:51 +01:00
c67x00 usb/c67x00: Replace tasklet with work 2021-01-26 18:36:37 +01:00
cdns3 usb: cdnsp: Fixes issue with Configure Endpoint command 2021-04-12 20:19:23 +08:00
chipidea usb: chipidea: tegra: Silence deferred probe error 2021-03-23 12:50:32 +01:00
class USB-serial updates for 5.13-rc1 2021-04-22 11:19:49 +02:00
common usb: common: move function's kerneldoc next to its definition 2021-03-10 09:37:17 +01:00
core USB: Add reset-resume quirk for WD19's Realtek Hub 2021-04-22 10:52:56 +02:00
dwc2 usb: dwc2: Get rid of useless error checks in suspend interrupt 2021-04-22 11:55:34 +02:00
dwc3 usb: dwc3: gadget: Handle DEV_TXF_FLUSH_BYPASS capability 2021-04-23 13:05:15 +02:00
early usb: early: ehci-dbgp: convert to readl_poll_timeout_atomic() 2020-09-25 16:29:09 +02:00
gadget SCSI misc on 20210428 2021-04-28 17:22:10 -07:00
host usb: xhci-mtk: remove bus status check 2021-04-22 11:02:07 +02:00
image USB: microtek: use set_host_byte() 2020-09-16 12:42:10 +02:00
isp1760 usb: isp1760-hcd: convert to readl_poll_timeout_atomic() 2020-09-25 16:30:05 +02:00
misc usb: misc: adutux: fix whitespace coding style issue 2021-04-22 10:49:53 +02:00
mon
mtu3 usb: mtu3: drop CONFIG_OF 2021-03-26 14:47:19 +01:00
musb usb: musb: musb_core: Add space after that ',' 2021-04-22 10:49:22 +02:00
phy usb: phy: phy-mxs-usb: Use of_device_get_match_data() 2021-01-18 18:35:46 +01:00
renesas_usbhs usb: renesas_usbhs: fix error return code of usbhsf_pkt_handler() 2021-03-23 12:42:15 +01:00
roles usb: roles: Call try_module_get() from usb_role_switch_find_by_fwnode() 2021-04-09 16:07:03 +02:00
serial USB: serial: cp210x: fix CP2102N-A01 modem control 2021-06-10 16:59:00 +02:00
storage usb: storage: datafab: remove redundant assignment of variable result 2021-04-22 10:52:10 +02:00
typec usb: typec: tcpm: Fix error while calculating PPS out values 2021-04-22 08:57:34 +02:00
usbip Scheduler updates for this cycle are: 2021-04-28 13:33:57 -07:00
Kconfig
Makefile usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver 2020-12-29 12:36:13 +08:00
usb-skeleton.c