linux-kernel - [PATCH 20/33] dmaengine: at_hdmac: Do not print messages on console while holding the lock

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Message-ID: <20220820125717.588722-21-tudor.ambarus@microchip.com>
Date:   Sat, 20 Aug 2022 15:57:04 +0300
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     <vkoul@...nel.org>, <peda@...ntia.se>, <du@...ntia.se>,
        <regressions@...mhuis.info>
CC:     <ludovic.desroches@...rochip.com>, <maciej.sosnowski@...el.com>,
        <tudor.ambarus@...rochip.com>, <dan.j.williams@...el.com>,
        <nicolas.ferre@...rochip.com>, <mripard@...nel.org>,
        <torfl6749@...il.com>, <linux-kernel@...r.kernel.org>,
        <dmaengine@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 20/33] dmaengine: at_hdmac: Do not print messages on console while holding the lock

The descriptor was already removed from the transfer list, there's no
reason to keep the channel lock while printing desc info, thus do the
prints without holding the lock.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 drivers/dma/at_hdmac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 1cb0d26d30ed..16cea65a708d 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -983,6 +983,8 @@ static void atc_handle_error(struct at_dma_chan *atchan)
 		atc_dostart(atchan, desc);
 	}
 
+	spin_unlock_irqrestore(&atchan->lock, flags);
+
 	/*
 	 * KERN_CRITICAL may seem harsh, but since this only happens
 	 * when someone submits a bad physical address in a
@@ -998,8 +1000,6 @@ static void atc_handle_error(struct at_dma_chan *atchan)
 	list_for_each_entry(child, &bad_desc->tx_list, desc_node)
 		atc_dump_lli(atchan, &child->lli);
 
-	spin_unlock_irqrestore(&atchan->lock, flags);
-
 	/* Pretend the descriptor completed successfully */
 	atc_chain_complete(atchan, bad_desc);
 }
-- 
2.25.1