From: Cristian Marussi cristian.marussi@arm.com
[ Upstream commit b2ccba9e8cdc6fb3985cc227844e7c6af309ffb1 ]
Two distinct pools of xfer descriptors are allocated at initialization time: one (Tx) used to provide xfers to track commands and their replies (or delayed replies) and another (Rx) to pick xfers from to be used for processing notifications.
Such pools, though, are allocated globally to be used by the whole SCMI instance, they are not allocated per-channel and as such the allocation of notifications xfers cannot be simply skipped if no Rx channel was found for the base protocol common channel, because there could be defined more optional per-protocol dedicated channels that instead support Rx channels.
Change the conditional check to skip allocation for the notification pool only if no Rx channel has been detected on any per-channel protocol at all.
Fixes: 4ebd8f6dea81 ("firmware: arm_scmi: Add receive buffer support for notifications") Signed-off-by: Cristian Marussi cristian.marussi@arm.com Link: https://lore.kernel.org/r/20230326203449.3492948-1-cristian.marussi@arm.com Signed-off-by: Sudeep Holla sudeep.holla@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/arm_scmi/driver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 11842497b2261..7ccda7d720a19 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1463,7 +1463,7 @@ static int scmi_xfer_info_init(struct scmi_info *sinfo) return ret;
ret = __scmi_xfer_info_init(sinfo, &sinfo->tx_minfo); - if (!ret && idr_find(&sinfo->rx_idr, SCMI_PROTOCOL_BASE)) + if (!ret && !idr_is_empty(&sinfo->rx_idr)) ret = __scmi_xfer_info_init(sinfo, &sinfo->rx_minfo);
return ret;