[PATCH 5.10 063/104] net: ipa: set error code in gsi_channel_setup()

[Greg Kroah-Hartman]

From: Alex Elder <elder@xxxxxxxxxx>

[ Upstream commit 1d23a56b0296d29e7047b41fe0a42a001036160d ]

In gsi_channel_setup(), we check to see if the configuration data
contains any information about channels that are not supported by
the hardware.  If one is found, we abort the setup process, but
the error code (ret) is not set in this case.  Fix this bug.

Fixes: 650d1603825d8 ("soc: qcom: ipa: the generic software interface")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Alex Elder <elder@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210204010655.15619-1-elder@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ipa/gsi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index 4a68da7115d19..2a65efd3e8da9 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -1573,6 +1573,7 @@ static int gsi_channel_setup(struct gsi *gsi, bool legacy)
 		if (!channel->gsi)
 			continue;	/* Ignore uninitialized channels */
 
+		ret = -EINVAL;
 		dev_err(gsi->dev, "channel %u not supported by hardware\n",
 			channel_id - 1);
 		channel_id = gsi->channel_count;
-- 
2.27.0