From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>,
Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
Vinod Koul <vkoul@kernel.org>, Sasha Levin <sashal@kernel.org>,
dmaengine@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 03/34] dmaengine: dw-edma: Fix crash on loading/unloading driver
Date: Wed, 12 May 2021 14:02:34 -0400 [thread overview]
Message-ID: <20210512180306.664925-3-sashal@kernel.org> (raw)
In-Reply-To: <20210512180306.664925-1-sashal@kernel.org>
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
[ Upstream commit e970dcc4bd8e0a1376e794fc81d41d0fc98262dd ]
When the driver is compiled as a module and loaded if we try to unload
it, the Kernel shows a crash log. This Kernel crash is due to the
dma_async_device_unregister() call done after deleting the channels,
this patch fixes this issue.
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/4aa850c035cf7ee488f1d3fb6dee0e37be0dce0a.1613674948.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/dw-edma/dw-edma-core.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 08d71dafa001..58c8cc8fe0e1 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -937,22 +937,21 @@ int dw_edma_remove(struct dw_edma_chip *chip)
/* Power management */
pm_runtime_disable(dev);
+ /* Deregister eDMA device */
+ dma_async_device_unregister(&dw->wr_edma);
list_for_each_entry_safe(chan, _chan, &dw->wr_edma.channels,
vc.chan.device_node) {
- list_del(&chan->vc.chan.device_node);
tasklet_kill(&chan->vc.task);
+ list_del(&chan->vc.chan.device_node);
}
+ dma_async_device_unregister(&dw->rd_edma);
list_for_each_entry_safe(chan, _chan, &dw->rd_edma.channels,
vc.chan.device_node) {
- list_del(&chan->vc.chan.device_node);
tasklet_kill(&chan->vc.task);
+ list_del(&chan->vc.chan.device_node);
}
- /* Deregister eDMA device */
- dma_async_device_unregister(&dw->wr_edma);
- dma_async_device_unregister(&dw->rd_edma);
-
/* Turn debugfs off */
dw_edma_v0_core_debugfs_off();
--
2.30.2
parent reply other threads:[~2021-05-12 19:57 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20210512180306.664925-1-sashal@kernel.org>]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210512180306.664925-3-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=Gustavo.Pimentel@synopsys.com \
--cc=dmaengine@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).