From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-nvme@lists.infradead.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>
Subject: [PATCH v3 1/7] devcoredump: use memory_read_from_buffer
Date: Mon, 13 May 2019 00:54:11 +0900 [thread overview]
Message-ID: <1557676457-4195-2-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <1557676457-4195-1-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>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
* v3
- No change since v2
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:[~2019-05-12 15:54 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-12 15:54 [PATCH v3 0/7] nvme-pci: support device coredump Akinobu Mita
2019-05-12 15:54 ` Akinobu Mita [this message]
2019-05-13 15:28 ` [PATCH v3 1/7] devcoredump: use memory_read_from_buffer Chaitanya Kulkarni
2019-05-12 15:54 ` [PATCH v3 2/7] devcoredump: fix typo in comment Akinobu Mita
2019-05-13 15:24 ` Chaitanya Kulkarni
2019-05-12 15:54 ` [PATCH v3 3/7] devcoredump: allow to create several coredump files in one device Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 4/7] nvme: add basic facility to get telemetry log page Akinobu Mita
2019-05-13 15:34 ` Chaitanya Kulkarni
2019-05-14 14:04 ` Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 5/7] nvme-pci: add device coredump infrastructure Akinobu Mita
2019-05-13 13:50 ` Keith Busch
2019-05-13 15:01 ` Akinobu Mita
2019-05-13 14:02 ` Christoph Hellwig
2019-05-13 15:01 ` Akinobu Mita
2019-05-12 15:54 ` [PATCH v3 6/7] nvme-pci: trigger device coredump on command timeout Akinobu Mita
2019-05-13 13:52 ` Keith Busch
2019-05-12 15:54 ` [PATCH v3 7/7] nvme-pci: enable to trigger device coredump by hand Akinobu Mita
[not found] ` <CGME20190512155533epcas4p110edff15ebf5b2efae32e43f0f10ab59@epcms2p5>
2019-05-13 7:41 ` [PATCH v3 6/7] nvme-pci: trigger device coredump on command timeout Minwoo Im
2019-05-13 14:59 ` Akinobu Mita
[not found] ` <CGME20190512155540epcas4p14c15eb86b08dcd281e9a93a4fc190800@epcms2p1>
2019-05-13 7:46 ` [PATCH v3 5/7] nvme-pci: add device coredump infrastructure Minwoo Im
2019-05-13 15:23 ` Chaitanya Kulkarni
2019-05-14 14:06 ` Akinobu Mita
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