From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Patrick Lai <plai@codeaurora.org>,
Banajit Goswami <bgoswami@codeaurora.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] ASoC: qdsp6: q6core: Use struct_size() in kmemdup()
Date: Thu, 23 May 2019 11:07:48 -0500 [thread overview]
Message-ID: <20190523160748.GA4844@embeddedor> (raw)
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.
So, replace code of the following form:
sizeof(*fwk) + fwk->num_services * sizeof(fwk->svc_api_info[0]);
with:
struct_size(fwk, svc_api_info, fwk->num_services)
and so on...
Notice that variables bytes and len are unnecessary, hence they are
removed.
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
sound/soc/qcom/qdsp6/q6core.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/sound/soc/qcom/qdsp6/q6core.c b/sound/soc/qcom/qdsp6/q6core.c
index cdfc8ab6cfc0..ae314a652efe 100644
--- a/sound/soc/qcom/qdsp6/q6core.c
+++ b/sound/soc/qcom/qdsp6/q6core.c
@@ -98,13 +98,13 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data)
}
case AVCS_CMDRSP_GET_FWK_VERSION: {
struct avcs_cmdrsp_get_fwk_version *fwk;
- int bytes;
fwk = data->payload;
- bytes = sizeof(*fwk) + fwk->num_services *
- sizeof(fwk->svc_api_info[0]);
- core->fwk_version = kmemdup(data->payload, bytes, GFP_ATOMIC);
+ core->fwk_version = kmemdup(data->payload,
+ struct_size(fwk, svc_api_info,
+ fwk->num_services),
+ GFP_ATOMIC);
if (!core->fwk_version)
return -ENOMEM;
@@ -115,13 +115,13 @@ static int q6core_callback(struct apr_device *adev, struct apr_resp_pkt *data)
}
case AVCS_GET_VERSIONS_RSP: {
struct avcs_cmdrsp_get_version *v;
- int len;
v = data->payload;
- len = sizeof(*v) + v->num_services * sizeof(v->svc_api_info[0]);
-
- core->svc_version = kmemdup(data->payload, len, GFP_ATOMIC);
+ core->svc_version = kmemdup(data->payload,
+ struct_size(v, svc_api_info,
+ v->num_services),
+ GFP_ATOMIC);
if (!core->svc_version)
return -ENOMEM;
--
2.21.0
reply other threads:[~2019-05-23 16:07 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=20190523160748.GA4844@embeddedor \
--to=gustavo@embeddedor.com \
--cc=alsa-devel@alsa-project.org \
--cc=bgoswami@codeaurora.org \
--cc=broonie@kernel.org \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=perex@perex.cz \
--cc=plai@codeaurora.org \
--cc=tiwai@suse.com \
/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).