raiden00pl 58d1d9f9d6 drivers/usbdev/cdcacm: serialize the TX ring drain with the class spinlock ... cdcacm_sndpacket() runs from task context and from the bulk IN completion callback, which may be interrupt context. cdcuart_dmasend() advances the xmit tail non-atomically, so a completion arriving mid setup re-sends the same region and advances the tail past the head, re-transmitting a ring of stale data. c497c5feb0 dropped the critical section that used to cover this. Restore it with priv->lock held across the setup and EP_SUBMIT; the submit must stay inside to keep request order. cdcuart_dmasend() now runs with the lock held, so its own acquisition is removed. The race needs the writer to keep the ring non-empty across completions, so it only appears at high sustained write rates. On nRF52840, 131072-byte writes were received as ~147600 bytes - one extra CDCACM_TXBUFSIZE of stale data per hit. With this change the host receives exactly what was sent. Assisted-by: Claude Code Signed-off-by: raiden00pl <raiden00@railab.me>		2026-08-09 02:04:26 +08:00
..
adb.c
cdcacm.c	drivers/usbdev/cdcacm: serialize the TX ring drain with the class spinlock	2026-08-09 02:04:26 +08:00
cdcacm.h
cdcacm_desc.c
cdcecm.c	drivers/usbdev: re-assert soft connect in cdcecm/cdcncm disconnect()	2026-07-30 01:38:22 +08:00
cdcecm.h
cdcncm.c	drivers/usbdev: re-assert soft connect in cdcecm/cdcncm disconnect()	2026-07-30 01:38:22 +08:00
CMakeLists.txt
composite.c
composite.h
composite_desc.c
dfu.c
Kconfig
Make.defs
mtp.c
pl2303.c
rndis.c	drivers/usbdev/rndis: Fix reported MTU OID sizes	2026-08-04 17:39:56 -03:00
rndis_std.h
usbdev_desc.c
usbdev_fs.c	drivers/: Multiple Drivers Are Registered With World Writable Part 3	2026-07-16 09:49:07 -03:00
usbdev_fs.h
usbdev_req.c
usbdev_strings.c
usbdev_trace.c
usbdev_trprintf.c
usbmsc.c	usbmsc: fix composite-mode class requests and Hi>Di stall behavior	2026-07-16 15:49:05 +08:00
usbmsc.h
usbmsc_desc.c
usbmsc_scsi.c	usbmsc: fix composite-mode class requests and Hi>Di stall behavior	2026-07-16 15:49:05 +08:00
uvc.c