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thunderbolt: Fix buffer allocation of devices with no DisplayPort adapters 

For the case of a device without DisplayPort adapters we calculate
incorrectly the amount of buffers. Fix the calculation for this case.

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Gil Fine 2022-05-09 23:49:03 +03:00 committed by Mika Westerberg
parent 8e1de70425
commit 93bf344f66
1 changed files with 5 additions and 2 deletions
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7
drivers/thunderbolt/tunnel.c
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@ -102,8 +102,11 @@ static unsigned int tb_available_credits(const struct tb_port *port,
* Maximum number of DP streams possible through the
* lane adapter.
*/
ndp = (credits - (usb3 + pcie + spare)) /
(sw->min_dp_aux_credits + sw->min_dp_main_credits);
if (sw->min_dp_aux_credits + sw->min_dp_main_credits)
ndp = (credits - (usb3 + pcie + spare)) /
(sw->min_dp_aux_credits + sw->min_dp_main_credits);
else
ndp = 0;
} else {
ndp = 0;
}