idpf: stop Tx if there are insufficient buffer resources

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[ Upstream commit 0c3f135e84 ]

The Tx refillq logic will cause packets to be silently dropped if there
are not enough buffer resources available to send a packet in flow
scheduling mode. Instead, determine how many buffers are needed along
with number of descriptors. Make sure there are enough of both resources
to send the packet, and stop the queue if not.

Fixes: 7292af042b ("idpf: fix a race in txq wakeup")
Signed-off-by: Joshua Hay <joshua.a.hay@intel.com>
Reviewed-by: Madhu Chittim <madhu.chittim@intel.com>
Tested-by: Samuel Salin <Samuel.salin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Joshua Hay 2025-12-15 13:42:46 -08:00 • committed by Greg Kroah-Hartman

parent e3e11c9db1

commit a7a7bff258

3 changed files with 47 additions and 19 deletions

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4

drivers/net/ethernet/intel/idpf/idpf_singleq_txrx.c

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47

drivers/net/ethernet/intel/idpf/idpf_txrx.c

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15

drivers/net/ethernet/intel/idpf/idpf_txrx.h

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