From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Vinod Koul <vkoul@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Peter Ujfalusi <peter.ujfalusi@ti.com>,
<dmaengine@vger.kernel.org>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>,
Sekhar Nori <nsekhar@ti.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Vignesh Raghavendra <vigneshr@ti.com>
Subject: [PATCH] dmaengine: ti: k3-psil: fix deadlock on error path
Date: Wed, 8 Apr 2020 21:55:01 +0300 [thread overview]
Message-ID: <20200408185501.30776-1-grygorii.strashko@ti.com> (raw)
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>
---
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 d7b965049ccb..fb7c8150b0d1 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);
--
2.17.1
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next reply other threads:[~2020-04-08 18:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-08 18:55 Grygorii Strashko [this message]
2020-04-09 6:45 ` [PATCH] dmaengine: ti: k3-psil: fix deadlock on error path Peter Ujfalusi
2020-04-15 16:05 ` Vinod Koul
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