kernel/git/next/linux-next.git/drivers/tty, branch master

Merge branch 'tty-next' of https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git

2026-07-08T12:40:14+00:00

Merge branch 'tty-linus' of https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git

2026-07-08T11:22:39+00:00

serial: msm: Disable DMA for kernel console UART

2026-07-07T15:24:42+00:00

At the moment, concurrent writes from userspace and the kernel to the console can trigger a race condition that results in an infinite loop of the same messages printed over and over again. This is most likely to happen during system startup or shutdown when the init system starts/stops a large number of system services that interact with various kernel code. When userspace writes to the TTY device, the driver initiates an asynchronous DMA transfer and releases the port lock. At the same moment, the kernel printk path might grab the port lock and re-configure the UART controller for PIO, without waiting for the DMA operation to complete. It seems like this collision results in zero progress being reported for the DMA engine, so the same text is printed to the console over and over again. For the kernel console, we want a reliable output path that will be functional even during crashes etc. So rather than implementing complex code to synchronize the kernel console write routines with the userspace DMA write routines, simply disable DMA for the console UART instance. Similar checks exist in many other serial drivers, e.g. 8250_port.c, imx.c, sh-sci.c etc. Cc: stable Fixes: 3a878c430fd6 ("tty: serial: msm: Add TX DMA support") Signed-off-by: Stephan Gerhold Acked-by: Konrad Dybcio Link: https://patch.msgid.link/20260706-serial-msm-console-dma-collision-v1-1-3179b8cb1d89@linaro.org Signed-off-by: Greg Kroah-Hartman

serial: max310x: implement gpio_chip::get_direction()

2026-07-07T15:24:08+00:00

It's strongly recommended for GPIO drivers to always implement the .get_direction() callback - even when the direction is tracked in software. The GPIO core emits a warning when the callback is missing and a user reads the direction of a line, e.g. via /sys/kernel/debug/gpio. The MAX310X keeps the GPIO direction in the GPIOCFG register (a set bit selects output), which the existing direction_input/output callbacks already program, so the current direction can be read back directly. Fixes: f65444187a66 ("serial: New serial driver MAX310X") Cc: stable Signed-off-by: Tapio Reijonen Reviewed-by: Linus Walleij Reviewed-by: Bartosz Golaszewski Reviewed-by: Hugo Villeneuve Link: https://patch.msgid.link/20260615-b4-serial-max310x-gpio-get-direction-v2-1-4704ba2b181a@vaisala.com Signed-off-by: Greg Kroah-Hartman

tty: goldfish: use guard() for locks

2026-07-03T11:01:52+00:00

Using guard()s is cleaner and safer. goldfish_tty_probe() is omitted due to the crossing err_unmap goto-label. Using scoped_guard() does not look that nice there. Perhaps if someone refactored the locked part into a separate function... Signed-off-by: Jiri Slaby (SUSE) Link: https://patch.msgid.link/20260703084717.176442-4-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: goldfish: move gf_write_ptr() to tty/goldfish.c

2026-07-03T11:01:52+00:00

tty/goldfish.c is the only user of gf_write_ptr(). Move it there, drop the unneeded casts, and name it appropriately. FTR, the last non-tty user was removed in 2018 by 4ae0fe70a097 ("Delete the goldfish_nand driver."). Signed-off-by: Jiri Slaby (SUSE) Link: https://patch.msgid.link/20260703084717.176442-3-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

tty: goldfish: drop unused goldfish_tty::opencount

2026-07-03T11:01:51+00:00

The field was never used. Signed-off-by: Jiri Slaby (SUSE) Link: https://patch.msgid.link/20260703084717.176442-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman

Replace by more specific (c files)

2026-07-03T05:38:17+00:00

Replace the #include of by the more specific where applicable. For most cases the include can be dropped completely, only a few drivers need one or two headers added. Acked-by: Danilo Krummrich Acked-by: Takashi Sakamoto Acked-by: Bjorn Helgaas Link: https://patch.msgid.link/1a3f2007c5c5dcf555c09a4035ce3ae8ef1b6c49.1782808461.git.u.kleine-koenig@baylibre.com Signed-off-by: Uwe Kleine-König (The Capable Hub)

Merge tag 'tty-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2026-06-22T18:51:49+00:00

Pull tty / serial driver updates from Greg KH: "Here is the big set of TTY and Serial driver updates for 7.2-rc1. Overall we end up removing more code than added, due to an obsolete synclink_gt driver being removed from the tree, always a nice thing to see happen. Other than that driver removal, major things included in here are: - max310x serial driver updates and fixes - 8250 driver updates and rework in places to make it more "modern" - dts file updates - serial driver core tweaks and updates - vt code cleanups - vc_screen crash fixes - other minor driver updates and cleanups All of these have been in linux-next for well over a week with no reported issues" * tag 'tty-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (49 commits) serial: 8250_pci: Don't specify conflicting values to pci_device_id members vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write serial: qcom_geni: Fix RX DMA stall when SE_DMA_RX_LEN_IN is zero vt: merge ucs_is_zero_width()/ucs_is_double_width() into ucs_get_width() serial: 8250: fix possible ISR soft lockup dt-bindings: serial: rs485: remove deprecated .txt binding stub serial: qcom-geni: trace: Add tracepoint support for Qualcomm GENI serial tty: serial: Use named initializers for arrays of i2c_device_data serial: 8250_dw: remove clock-notifier infrastructure serial: 8250_dw: unregister 8250 port if clk_notifier_register() fails amba/serial: amba-pl011: Bring back zx29 UART support serial: 8250: Add support for console flow control serial: 8250: Check LSR timeout on console flow control serial: 8250: Set cons_flow on port registration tty: serial: 8250: protect against NULL uart->port.dev in register arm64: dts: add support for A9 based Amlogic BY401 dt-bindings: arm: amlogic: add A311Y3 support serial: max310x: fix compile errors if CONFIG_SPI_MASTER is disabled serial: qcom-geni: Avoid probing debug console UART without console support serial: max310x: add comments for PLL limits ...

Merge tag 'fbdev-for-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

2026-06-16T02:58:41+00:00

Pull fbdev updates from Helge Deller: "Beside the removal of the Hercules monochrome ISA graphics driver and the corresponding text console driver, there is just the typical maintanance with smaller driver fixes and cleanups: Removal of drivers: - Hercules monochrome ISA graphics adapter driver (Ethan Nelson-Moore) - Hercules mdacon console driver (Ethan Nelson-Moore) Changes affecting many drivers at once: - possible memory leak fixes in various drivers (Abdun Nihaal) - many conversions to use strscpy() (David Laight) - Use named initializers in drivers (Uwe Kleine-König) Code fixes: - fbcon: don't suspend/resume when vc is graphics mode (Lu Yao) - modedb: fix a possible UAF in fb_find_mode() (Tuo Li) - modedb: Fix entry for 1920x1080-60 mode (Steffen Persvold) - arm: Export acorndata_8x8 font symbol for bootloader (Helge Deller) - omap2: fix use-after-free in omapfb_mmap (Hongling Zeng) Cleanups: - pxa168fb: use devm_ioremap_resource() (Alberto Arostegui) - provice helpers for fb_set_var() and fb_blank() and fbcon updates (Thomas Zimmermann) - fbcon: Use correct type for vc_resize() return value (Jiacheng Yu) - chipsfb: add missing MODULE_DESCRIPTION() macro (Rahman Mahmutović) - sunxvr2500: replace printk with device-aware logging functions (Rahman Mahmutović) - sm712: Fix operator precedence in big_swap macro (Li RongQing) - imxfb: Use of_device_get_match_data() (Rosen Penev) - atmel_lcdfb: Use of_device_get_match_data() (Rosen Penev) Documentation fixes: - grvga: Fix CLUT register address offset in comment (Eduardo Silva) - omap/dss: Fix stale modedb.c path (Costa Shulyupin) - correct CONFIG_FB_TILEBLITTING macro name in #endif comment (Ethan Nelson-Moore)" * tag 'fbdev-for-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (43 commits) fbdev: modedb: Fix misaligned fields in the 1920x1080-60 mode fbdev: modedb: fix a possible UAF in fb_find_mode() fbdev: s3fb: Use strscpy() to copy strings into arrays fbdev: sm501fb: Fix buffer errors in OF binding code fbcon: correct CONFIG_FB_TILEBLITTING macro name in #endif comment fbdev/arm: Export acorndata_8x8 font symbol for bootloader fbdev: mmpfb: Use strscpy() to copy device name fbdev: sisfb: Replace strlen() strcpy() pair with strscpy() fbdev: rivafb: Use strscpy() to copy device name fbdev: cyber2000fb: Use strscpy() to copy device name fbdev: atmel_lcdfb: Use strscpy() to copy device name fbdev: Do not export fbcon from fbdev fbdev: Wrap fbcon updates from vga-switcheroo in helper fbdev: Wrap user-invoked calls to fb_blank() in helper fbdev: Wrap user-invoked calls to fb_set_var() in helper fbdev: omap2: fix use-after-free in omapfb_mmap docs: omap/dss: Fix stale modedb.c path fbdev: pxa168fb: use devm_ioremap_resource() for MMIO fbdev: grvga: Fix CLUT register address offset in comment fbdev: sunxvr2500: replace printk with device-aware logging functions ...