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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-03 23:23:10 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-07-03 23:23:10 +0300 |
commit | 56cbceab928d7ac3702de172ff8dcc1da2a6aaeb (patch) | |
tree | d225b447d5421b652dae4b7d3501bc82900a8ecf /drivers/usb/serial/ch341.c | |
parent | 868a9fd9480785952336e5f119e1f75877c423a8 (diff) | |
parent | 18af4b5c97915a6daef9de28a30ae1d3786bc2ac (diff) | |
download | linux-56cbceab928d7ac3702de172ff8dcc1da2a6aaeb.tar.xz |
Merge tag 'usb-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB / Thunderbolt driver updates from Greg KH:
"Here is the big set of USB and Thunderbolt driver updates for 6.5-rc1.
Included in here are:
- Lots of USB4/Thunderbolt additions and updates for new hardware
types and fixes as people are starting to get access to the
hardware in the wild
- new gadget controller driver, cdns2, added
- new typec drivers added
- xhci driver updates
- typec driver updates
- usbip driver fixes
- usb-serial driver updates and fixes
- lots of smaller USB driver updates
All of these have been in linux-next for a while with no reported
problems"
* tag 'usb-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (265 commits)
usb: host: xhci-plat: Set XHCI_STATE_REMOVING before resuming XHCI HC
usb: host: xhci: Do not re-initialize the XHCI HC if being removed
usb: typec: nb7vpq904m: fix CONFIG_DRM dependency
usbip: usbip_host: Replace strlcpy with strscpy
usb: dwc3: gadget: Propagate core init errors to UDC during pullup
USB: serial: option: add LARA-R6 01B PIDs
usb: ulpi: Make container_of() no-op in to_ulpi_dev()
usb: gadget: legacy: fix error return code in gfs_bind
usb: typec: fsa4480: add support for Audio Accessory Mode
usb: typec: fsa4480: rework mux & switch setup to handle more states
usb: typec: ucsi: call typec_set_mode on non-altmode partner change
USB: gadget: f_hid: make hidg_class a static const structure
USB: gadget: f_printer: make usb_gadget_class a static const structure
USB: mon: make mon_bin_class a static const structure
USB: gadget: udc: core: make udc_class a static const structure
USB: roles: make role_class a static const structure
dt-bindings: usb: dwc3: Add interrupt-names property support for wakeup interrupt
dt-bindings: usb: Add StarFive JH7110 USB controller
dt-bindings: usb: dwc3: Add IPQ9574 compatible
usb: cdns2: Fix spelling mistake in a trace message "Wakupe" -> "Wakeup"
...
Diffstat (limited to 'drivers/usb/serial/ch341.c')
-rw-r--r-- | drivers/usb/serial/ch341.c | 37 |
1 files changed, 23 insertions, 14 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c index 6e1b87e67304..612bea504d7a 100644 --- a/drivers/usb/serial/ch341.c +++ b/drivers/usb/serial/ch341.c @@ -562,12 +562,12 @@ static void ch341_set_termios(struct tty_struct *tty, * TCSBRKP. Due to how the simulation is implemented the duration can't be * controlled. The duration is always about (1s / 46bd * 9bit) = 196ms. */ -static void ch341_simulate_break(struct tty_struct *tty, int break_state) +static int ch341_simulate_break(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; struct ch341_private *priv = usb_get_serial_port_data(port); unsigned long now, delay; - int r; + int r, r2; if (break_state != 0) { dev_dbg(&port->dev, "enter break state requested\n"); @@ -599,7 +599,7 @@ static void ch341_simulate_break(struct tty_struct *tty, int break_state) */ priv->break_end = jiffies + (11 * HZ / CH341_MIN_BPS); - return; + return 0; } dev_dbg(&port->dev, "leave break state requested\n"); @@ -615,17 +615,22 @@ static void ch341_simulate_break(struct tty_struct *tty, int break_state) schedule_timeout_interruptible(delay); } + r = 0; restore: /* Restore original baud rate */ - r = ch341_set_baudrate_lcr(port->serial->dev, priv, priv->baud_rate, - priv->lcr); - if (r < 0) + r2 = ch341_set_baudrate_lcr(port->serial->dev, priv, priv->baud_rate, + priv->lcr); + if (r2 < 0) { dev_err(&port->dev, "restoring original baud rate of %u failed: %d\n", - priv->baud_rate, r); + priv->baud_rate, r2); + return r2; + } + + return r; } -static void ch341_break_ctl(struct tty_struct *tty, int break_state) +static int ch341_break_ctl(struct tty_struct *tty, int break_state) { const uint16_t ch341_break_reg = ((uint16_t) CH341_REG_LCR << 8) | CH341_REG_BREAK; @@ -635,17 +640,17 @@ static void ch341_break_ctl(struct tty_struct *tty, int break_state) uint16_t reg_contents; uint8_t break_reg[2]; - if (priv->quirks & CH341_QUIRK_SIMULATE_BREAK) { - ch341_simulate_break(tty, break_state); - return; - } + if (priv->quirks & CH341_QUIRK_SIMULATE_BREAK) + return ch341_simulate_break(tty, break_state); r = ch341_control_in(port->serial->dev, CH341_REQ_READ_REG, ch341_break_reg, 0, break_reg, 2); if (r) { dev_err(&port->dev, "%s - USB control read error (%d)\n", __func__, r); - return; + if (r > 0) + r = -EIO; + return r; } dev_dbg(&port->dev, "%s - initial ch341 break register contents - reg1: %x, reg2: %x\n", __func__, break_reg[0], break_reg[1]); @@ -663,9 +668,13 @@ static void ch341_break_ctl(struct tty_struct *tty, int break_state) reg_contents = get_unaligned_le16(break_reg); r = ch341_control_out(port->serial->dev, CH341_REQ_WRITE_REG, ch341_break_reg, reg_contents); - if (r < 0) + if (r < 0) { dev_err(&port->dev, "%s - USB control write error (%d)\n", __func__, r); + return r; + } + + return 0; } static int ch341_tiocmset(struct tty_struct *tty, |