linux-stable/drivers/ntb
Dave Jiang a792f1de88 ntb: Fix calculation ntb_transport_tx_free_entry()
commit 5a7693e6bb upstream.

ntb_transport_tx_free_entry() never returns 0 with the current
calculation. If head == tail, then it would return qp->tx_max_entry.
Change compare to tail >= head and when they are equal, a 0 would be
returned.

Fixes: e74bfeedad ("NTB: Add flow control to the ntb_netdev")
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: renlonglong <ren.longlong@h3c.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-09-23 10:48:10 +02:00
..
hw ntb: intel: Fix error handling in intel_ntb_pci_driver_init() 2023-08-11 11:45:18 +02:00
test NTB: ntb_tool: Add check for devm_kcalloc 2023-08-11 11:45:19 +02:00
Kconfig
Makefile
ntb.c NTB: Revert the change to use the NTB device dev for DMA allocations 2020-06-25 15:33:03 +02:00
ntb_transport.c ntb: Fix calculation ntb_transport_tx_free_entry() 2023-09-23 10:48:10 +02:00