NTB: ntb_transport: Recycle TX entries before client callbacks

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ntb_tx_copy_callback() invokes the client callback before returning the
entry to tx_free_q. The callback may wake a stopped client queue, only
for the next enqueue to find no local entry and return -EBUSY. The window
is narrow, but the retry is unnecessary.

Save the callback data and length, then return the entry to tx_free_q
before invoking the client. A completion callback then means both the
client buffer and transport entry are ready for reuse.

Fixes: fce8a7bb5b ("PCI-Express Non-Transparent Bridge Support")
Cc: stable@vger.kernel.org
Signed-off-by: Koichiro Den <den@valinux.co.jp>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260817053519.4135287-2-den@valinux.co.jp
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Koichiro Den 2026-08-17 14:35:16 +09:00 • committed by Jakub Kicinski

parent 8197c18005

commit 2564963972

1 changed files with 14 additions and 9 deletions

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drivers/ntb/ntb_transport.c

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