ntb: Fix calculation ntb_transport_tx_free_entry()

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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>

...

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Dave Jiang 2023-08-22 09:04:57 -07:00 • committed by Greg Kroah-Hartman

parent 88c7931f81

commit 5a3e327dc3

1 changed files with 1 additions and 1 deletions

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drivers/ntb/ntb_transport.c

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