From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: gregkh@linuxfoundation.org
Cc: linux-kernel@vger.kernel.org, Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH v2] uio: uio_dmem_genirq: Catch the Exception
Date: Sat, 4 Dec 2021 08:03:26 +0800 [thread overview]
Message-ID: <20211204000326.1592687-1-jiasheng@iscas.ac.cn> (raw)
The return value of dma_set_coherent_mask() is not always 0.
To catch the exception in case that dma is not support the mask.
Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog
v1 -> v2
* Change 1. Print out the DMA error.
---
drivers/uio/uio_dmem_genirq.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 6b5cfa5b0673..1106f3376404 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -188,7 +188,11 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
return -ENOMEM;
}
- dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(&pdev->dev, "DMA enable failed\n");
+ return ret;
+ }
priv->uioinfo = uioinfo;
spin_lock_init(&priv->lock);
--
2.25.1
reply other threads:[~2021-12-04 0:03 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20211204000326.1592687-1-jiasheng@iscas.ac.cn \
--to=jiasheng@iscas.ac.cn \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.