From: Akinobu Mita <akinobu.mita@gmail.com>
To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
Johannes Berg <johannes@sipsolutions.net>,
Keith Busch <keith.busch@intel.com>, Jens Axboe <axboe@fb.com>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
Minwoo Im <minwoo.im.dev@gmail.com>,
Kenneth Heitke <kenneth.heitke@intel.com>,
Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Subject: [PATCH 1/2] devcoredump: use memory_read_from_buffer
Date: Sun, 28 Jul 2019 00:59:05 +0900 [thread overview]
Message-ID: <1564243146-5681-2-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <1564243146-5681-1-git-send-email-akinobu.mita@gmail.com>
Use memory_read_from_buffer() to simplify devcd_readv().
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Minwoo Im <minwoo.im.dev@gmail.com>
Cc: Kenneth Heitke <kenneth.heitke@intel.com>
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
drivers/base/devcoredump.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index f1a3353..3c960a6 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -164,16 +164,7 @@ static struct class devcd_class = {
static ssize_t devcd_readv(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen)
{
- if (offset > datalen)
- return -EINVAL;
-
- if (offset + count > datalen)
- count = datalen - offset;
-
- if (count)
- memcpy(buffer, ((u8 *)data) + offset, count);
-
- return count;
+ return memory_read_from_buffer(buffer, count, &offset, data, datalen);
}
static void devcd_freev(void *data)
--
2.7.4
next prev parent reply other threads:[~2019-07-27 16:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-27 15:59 [PATCH 0/2] devcoredump: cleanup and typo fix Akinobu Mita
2019-07-27 15:59 ` Akinobu Mita [this message]
2019-07-27 15:59 ` [PATCH 2/2] devcoredump: fix typo in comment Akinobu Mita
2019-07-27 18:43 ` Johannes Berg
2019-07-30 16:23 ` Greg KH
2019-07-30 16:37 ` Johannes Berg
2019-07-30 16:45 ` Greg KH
2019-07-30 16:49 ` Johannes Berg
2019-07-30 17:11 ` Greg KH
2019-07-30 17:14 ` Johannes Berg
2019-07-31 10:00 [PATCH 1/2] devcoredump: use memory_read_from_buffer Johannes Berg
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