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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Grygorii Strashko <grygorii.strashko@ti.com>,
        Peter Ujfalusi <peter.ujfalusi@ti.com>,
        Vinod Koul <vkoul@kernel.org>, Sasha Levin <sashal@kernel.org>,
        dmaengine@vger.kernel.org
Subject: [PATCH AUTOSEL 5.6 04/50] dmaengine: ti: k3-psil: fix deadlock on error path
Date:   Thu,  7 May 2020 10:26:40 -0400
Message-Id: <20200507142726.25751-4-sashal@kernel.org>
In-Reply-To: <20200507142726.25751-1-sashal@kernel.org>
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From: Grygorii Strashko <grygorii.strashko@ti.com>

[ Upstream commit 172d59ecd61b89f535ad99a7e531c0f111453b9a ]

The mutex_unlock() is missed on error path of psil_get_ep_config()
which causes deadlock, so add missed mutex_unlock().

Fixes: 8c6bb62f6b4a ("dmaengine: ti: k3 PSI-L remote endpoint configuration")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200408185501.30776-1-grygorii.strashko@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/dma/ti/k3-psil.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/ti/k3-psil.c b/drivers/dma/ti/k3-psil.c
index d7b965049ccb1..fb7c8150b0d1d 100644
--- a/drivers/dma/ti/k3-psil.c
+++ b/drivers/dma/ti/k3-psil.c
@@ -27,6 +27,7 @@ struct psil_endpoint_config *psil_get_ep_config(u32 thread_id)
 			soc_ep_map = &j721e_ep_map;
 		} else {
 			pr_err("PSIL: No compatible machine found for map\n");
+			mutex_unlock(&ep_map_mutex);
 			return ERR_PTR(-ENOTSUPP);
 		}
 		pr_debug("%s: Using map for %s\n", __func__, soc_ep_map->name);
-- 
2.20.1