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linux/drivers/usb/host
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Mathias Nyman cab63934c3 xhci: dbc: Avoid event polling busyloop if pending rx transfers are inactive. 
Event polling delay is set to 0 if there are any pending requests in
either rx or tx requests lists. Checking for pending requests does
not work well for "IN" transfers as the tty driver always queues
requests to the list and TRBs to the ring, preparing to receive data
from the host.

This causes unnecessary busylooping and cpu hogging.

Only set the event polling delay to 0 if there are pending tx "write"
transfers, or if it was less than 10ms since last active data transfer
in any direction.

Cc: Łukasz Bartosik <ukaszb@chromium.org>
Fixes: fb18e5bb96 ("xhci: dbc: poll at different rate depending on data transfer activity")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20250505125630.561699-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-05-05 16:30:45 +02:00
..
bcma-hcd.c USB: bcma: Remove unused of_gpio.h 2024-11-04 01:27:52 +01:00
ehci-atmel.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-brcm.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-dbg.c USB: Use EHCI control transfer pid macros instead of constant values. 2024-03-26 10:43:35 +01:00
ehci-exynos.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-fsl.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-fsl.h
ehci-grlib.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-hcd.c usb: ehci: Switch to use hrtimer_setup() 2025-02-18 11:19:02 +01:00
ehci-hub.c usb: ehci: add workaround for chipidea PORTSC.PEC bug 2023-08-09 14:16:06 +02:00
ehci-mem.c
ehci-mv.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-npcm7xx.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-omap.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-orion.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-pci.c USB: Extend pci resume function to handle PM events 2023-05-13 17:33:18 +09:00
ehci-platform.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
ehci-ppc-of.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-ps3.c
ehci-q.c USB: Use EHCI control transfer pid macros instead of constant values. 2024-03-26 10:43:35 +01:00
ehci-sched.c usb: host: ehci-sched: try to turn on io watchdog as long as periodic_count > 0 2023-08-12 10:03:22 +02:00
ehci-sh.c usb: ehci-hcd: fix call balance of clocks handling routines 2024-12-04 16:25:13 +01:00
ehci-spear.c usb: ehci-spear: fix call balance of sehci clk handling routines 2024-11-16 09:04:06 +01:00
ehci-st.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci-sysfs.c
ehci-timer.c
ehci-xilinx-of.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ehci.h USB: Use EHCI control transfer pid macros instead of constant values. 2024-03-26 10:43:35 +01:00
fhci-dbg.c
fhci-hcd.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
fhci-hub.c USB: FHCI: Switch to GPIO descriptors 2022-09-01 16:08:29 +02:00
fhci-mem.c
fhci-q.c
fhci-sched.c usb: host: fix typo in the comment 2024-10-04 15:08:37 +02:00
fhci-tds.c
fhci.h USB: FHCI: Switch to GPIO descriptors 2022-09-01 16:08:29 +02:00
fsl-mph-dr-of.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
isp116x-hcd.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
isp116x.h
isp1362-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
isp1362.h
Kconfig xhci-pci: Make xhci-pci-renesas a proper modular driver 2024-08-07 12:51:38 +02:00
Makefile usb: host: u132-hcd: Delete driver 2023-03-21 14:06:11 +01:00
max3421-hcd.c usb: host: max3421-hcd: Add missing spi_device_id table 2025-02-03 16:28:54 +01:00
octeon-hcd.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
octeon-hcd.h staging: octeon-usb: move driver out of staging 2022-06-21 16:43:37 +02:00
ohci-at91.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-da8xx.c Merge 6.12-rc3 into usb-next 2024-10-14 08:03:44 +02:00
ohci-dbg.c
ohci-exynos.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
ohci-hub.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
ohci-mem.c
ohci-nxp.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-omap.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-pci.c USB: OHCI: Add quirk for LS7A OHCI controller (rev 0x02) 2025-04-11 16:21:20 +02:00
ohci-platform.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-ppc-of.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-ps3.c
ohci-pxa27x.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-q.c
ohci-s3c2410.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-sa1111.c ARM: sa1100: remove unused board files 2023-01-12 10:53:12 +01:00
ohci-sm501.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-spear.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci-st.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
ohci.h usb: Annotate struct urb_priv with __counted_by 2023-10-02 09:48:52 -07:00
oxu210hp-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
pci-quirks.c USB: pci-quirks: Fix HCCPARAMS register error for LS7A EHCI 2025-02-14 09:18:14 +01:00
pci-quirks.h usb: pci-quirks: handle HAS_IOPORT dependency for AMD quirk 2023-10-02 16:19:12 +02:00
r8a66597-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
r8a66597.h
sl811-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
sl811.h
sl811_cs.c
ssb-hcd.c
uhci-debug.c
uhci-grlib.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
uhci-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
uhci-hcd.h usb: uhci: handle HAS_IOPORT dependencies 2023-05-29 15:29:03 +01:00
uhci-hub.c
uhci-pci.c Merge 6.4-rc4 into usb-next 2023-05-28 15:25:53 +01:00
uhci-platform.c usb: uhci-platform: Make the clock really optional 2025-05-01 17:39:16 +02:00
uhci-q.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
xen-hcd.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
xhci-caps.h xhci: Add missing capability definition bits 2024-12-27 13:06:10 +01:00
xhci-dbg.c
xhci-dbgcap.c xhci: dbc: Avoid event polling busyloop if pending rx transfers are inactive. 2025-05-05 16:30:45 +02:00
xhci-dbgcap.h xhci: dbc: Avoid event polling busyloop if pending rx transfers are inactive. 2025-05-05 16:30:45 +02:00
xhci-dbgtty.c xhci: dbgtty: Improve performance by handling received data immediately. 2024-12-27 13:06:10 +01:00
xhci-debugfs.c xhci: don't mess with ->d_iname 2025-01-15 13:14:37 +01:00
xhci-debugfs.h
xhci-ext-caps.c
xhci-ext-caps.h xhci: Add USB4 tunnel detection for USB3 devices on Intel hosts 2024-09-03 09:54:39 +02:00
xhci-histb.c usb: xhci: change xhci_resume() parameters to explicit the desired info 2025-03-14 09:18:02 +01:00
xhci-hub.c xhci: Limit time spent with xHC interrupts disabled during bus resume 2025-04-11 14:36:55 +02:00
xhci-mem.c Merge v6.14-rc6 into usb-next 2025-03-10 08:16:31 +01:00
xhci-mtk-sch.c xhci: replace real & fake port with pointer to root hub port 2024-03-02 20:25:27 +01:00
xhci-mtk.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
xhci-mtk.h usb: xhci-mtk: fix a short packet issue of gen1 isoc-in transfer 2024-01-04 16:05:50 +01:00
xhci-mvebu.c usb: host: xhci-plat: mvebu: use ->quirks instead of ->init_quirk() func 2025-03-14 09:18:02 +01:00
xhci-mvebu.h usb: host: xhci-plat: mvebu: use ->quirks instead of ->init_quirk() func 2025-03-14 09:18:02 +01:00
xhci-pci-renesas.c module: Convert symbol namespace to string literal 2024-12-02 11:34:44 -08:00
xhci-pci.c usb: xhci: change xhci_resume() parameters to explicit the desired info 2025-03-14 09:18:02 +01:00
xhci-pci.h xhci-pci: Make xhci-pci-renesas a proper modular driver 2024-08-07 12:51:38 +02:00
xhci-plat.c usb: host: xhci-plat: allow upper layers to signal power loss 2025-03-14 09:18:02 +01:00
xhci-plat.h usb: host: xhci-plat: allow upper layers to signal power loss 2025-03-14 09:18:02 +01:00
xhci-port.h XHCI: Separate PORT and CAPs macros into dedicated file 2024-01-27 17:39:09 -08:00
xhci-rcar.c usb: Switch back to struct platform_driver::remove() 2024-10-04 15:13:03 +02:00
xhci-ring.c usb: xhci: Don't trust the EP Context cycle bit when moving HW dequeue 2025-05-05 16:30:45 +02:00
xhci-rzv2m.c usb: xhci-plat: Don't include xhci.h 2024-04-23 16:25:29 -07:00
xhci-rzv2m.h xhci: host: Add Renesas RZ/V2M SoC support 2023-01-25 15:48:17 +01:00
xhci-tegra.c usb: host: tegra: Prevent host controller crash when OTG port is used 2025-05-01 17:37:25 +02:00
xhci-trace.c xhci: Move functions to setup msi to xhci-pci 2023-03-23 17:25:22 +01:00
xhci-trace.h xhci: trace stream context at Set TR Deq command completion 2024-11-06 13:26:14 +01:00
xhci.c xhci: Limit time spent with xHC interrupts disabled during bus resume 2025-04-11 14:36:55 +02:00
xhci.h xhci: Limit time spent with xHC interrupts disabled during bus resume 2025-04-11 14:36:55 +02:00