From: Lee Jones <lee@kernel.org>
To: lee@kernel.org, Ming Yu <tmyu0@nuvoton.com>,
mfd@lists.linux.dev, linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Subject: [PATCH 08/28] mfd: nct6694: Do not resubmit interrupt URB on endpoint stall (-EPIPE)
Date: Wed, 21 Oct 2026 12:09:30 +0000 [thread overview]
Message-ID: <20261021121245.3111563-8-lee@kernel.org> (raw)
In-Reply-To: <20261021121245.3111563-1-lee@kernel.org>
If the USB interrupt IN endpoint stalls (-EPIPE), usb_int_callback()
falls through to the default case and immediately resubmits the URB from
atomic completion context. Because a stalled endpoint completes newly
submitted URBs immediately with -EPIPE, this triggers a tight infinite
resubmission loop.
Treat -EPIPE as a terminal URB status in usb_int_callback() alongside
the existing teardown status codes, matching other USB MFD drivers.
Fixes: 51dad33ede63 ("mfd: Add core driver for Nuvoton NCT6694")
Closes: https://sashiko.dev/#/bug/linux-9d8d1902-140d-4559-b604-76ba76e778a2
Cc: stable@vger.kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
---
drivers/mfd/nct6694.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mfd/nct6694.c b/drivers/mfd/nct6694.c
index e2957e587d1b..40a29f8e0ff6 100644
--- a/drivers/mfd/nct6694.c
+++ b/drivers/mfd/nct6694.c
@@ -201,6 +201,7 @@ static void usb_int_callback(struct urb *urb)
break;
case -ECONNRESET:
case -ENOENT:
+ case -EPIPE:
case -ESHUTDOWN:
return;
default:
--
2.56.0.218.g1ec904b173-goog
next prev parent reply other threads:[~2026-10-21 12:14 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 12:09 [PATCH 01/28] mfd: nct6694: Allocate USB DMA buffers with kzalloc_obj() Lee Jones
2026-10-21 12:09 ` [PATCH 02/28] mfd: ls2kbmc: Unregister GPIO GSI via devm_add_action_or_reset() Lee Jones
2026-10-21 13:57 ` Andy Shevchenko
2026-10-21 14:00 ` Andy Shevchenko
2026-10-21 12:09 ` [PATCH 03/28] mfd: ls2kbmc: Cancel reset work on teardown via devm_work_autocancel() Lee Jones
2026-10-21 13:59 ` Andy Shevchenko
2026-10-21 12:09 ` [PATCH 04/28] mfd: ls2kbmc: Allocate simplefb platform_data on the heap Lee Jones
2026-10-21 13:58 ` Andy Shevchenko
2026-10-21 12:09 ` [PATCH 05/28] mfd: bd96801: Allocate watchdog IRQ resource " Lee Jones
2026-10-21 12:09 ` [PATCH 06/28] mfd: ti_am335x_tscadc: Retrieve parent driver data via dev_get_drvdata() Lee Jones
2026-10-21 12:09 ` [PATCH 07/28] mfd: db8500-prcmu: Make AB8500 cell and IRQ resource static Lee Jones
2026-10-21 12:09 ` Lee Jones [this message]
2026-10-21 12:09 ` [PATCH 09/28] mfd: cgbc: Zero-initialise version buffer in cgbc_get_version() Lee Jones
2026-10-21 12:09 ` [PATCH 10/28] mfd: ioc3: Request parent IRQ via request_irq() and free before domain removal Lee Jones
2026-10-21 12:09 ` [PATCH 11/28] mfd: intel-lpss: Remove registered MFD child devices on probe failure Lee Jones
2026-10-21 14:01 ` Andy Shevchenko
2026-10-21 12:09 ` [PATCH 12/28] mfd: max8907: Manage power-off handler via devm_register_sys_off_handler() Lee Jones
2026-10-21 12:09 ` [PATCH 13/28] mfd: twl-core: Clear pm_power_off callback in twl_remove() Lee Jones
2026-10-21 12:09 ` [PATCH 14/28] mfd: twl-core: Clear twl_priv pointer on teardown and probe failure Lee Jones
2026-10-21 12:09 ` [PATCH 15/28] mfd: loongson-se: Check return value of dma_set_mask_and_coherent() Lee Jones
2026-10-21 12:09 ` [PATCH 16/28] mfd: loongson-se: Zero-initialise controller command structures Lee Jones
2026-10-21 12:09 ` [PATCH 17/28] mfd: loongson-se: Reinitialise completions and wait uninterruptibly for commands Lee Jones
2026-10-21 12:09 ` [PATCH 18/28] mfd: loongson-se: Zero-allocate driver data and initialise engine completions in probe Lee Jones
2026-10-21 12:09 ` [PATCH 19/28] mfd: loongson-se: Prevent out-of-bounds engine access in se_irq_handler() Lee Jones
2026-10-21 12:09 ` [PATCH 20/28] mfd: loongson-se: Stop controller and mask interrupts on teardown and shutdown Lee Jones
2026-10-21 12:09 ` [PATCH 21/28] mfd: loongson-se: Validate engine ID, DMA buffer size, and IRQ registration Lee Jones
2026-10-21 12:09 ` [PATCH 22/28] mfd: abx500-core: Unregister device ops on devm release Lee Jones
2026-10-21 12:09 ` [PATCH 23/28] mfd: ab8500-core: Register sysfs attribute groups via devm_device_add_group() Lee Jones
2026-10-21 12:09 ` [PATCH 24/28] mfd: tps65217: Manage IRQ domain teardown via devres Lee Jones
2026-10-21 12:09 ` [PATCH 25/28] mfd: mt6397: Manage IRQ domain lifecycle with devres Lee Jones
2026-10-21 12:09 ` [PATCH 26/28] mfd: mt6397: Unregister PM notifier on probe failure and unbind Lee Jones
2026-10-21 12:09 ` [PATCH 27/28] i2c: cgbc: Propagate hardware errors when polling read status Lee Jones
2026-10-21 12:09 ` [PATCH 28/28] mfd: ti_am335x_tscadc: Remove redundant ti_tscadc_dev_get() helper Lee Jones
2026-10-21 14:02 ` Andy Shevchenko
2026-10-21 12:31 ` [PATCH 00/28] mfd: Assorted resource lifetime, teardown, and error-handling fixes Lee Jones
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