linux-kernel - [PATCH] spi: fsi: Fix transfer returning without finalizing message

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Date:   Tue, 10 Nov 2020 15:47:36 -0600
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-spi@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, joel@....id.au, broonie@...nel.org,
        eajames@...ux.ibm.com
Subject: [PATCH] spi: fsi: Fix transfer returning without finalizing message

In the case that the SPI mux isn't set, the transfer_one_message
function returns without finalizing the message. This means that
the transfer never completes, resulting in hung tasks and an
eventual kernel panic. Fix it by finalizing the transfer in this
case.

Fixes: 9211a441e606 ("spi: fsi: Check mux status before transfers")
Signed-off-by: Eddie James <eajames@...ux.ibm.com>
---
 drivers/spi/spi-fsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-fsi.c b/drivers/spi/spi-fsi.c
index 8a440c7078ef..3920cd3286d8 100644
--- a/drivers/spi/spi-fsi.c
+++ b/drivers/spi/spi-fsi.c
@@ -477,7 +477,7 @@ static int fsi_spi_transfer_one_message(struct spi_controller *ctlr,
 
 	rc = fsi_spi_check_mux(ctx->fsi, ctx->dev);
 	if (rc)
-		return rc;
+		goto error;
 
 	list_for_each_entry(transfer, &mesg->transfers, transfer_list) {
 		struct fsi_spi_sequence seq;
-- 
2.26.2