From: "K. Y. Srinivasan" <kys@microsoft.com>
To: gregkh@suse.de, linux-kernel@vger.kernel.org,
devel@linuxdriverproject.org, virtualization@lists.osdl.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>
Subject: [PATCH 16/20] Staging: hv: vmbus: Do not allocate struct hv_device_info on the stack
Date: Tue, 13 Sep 2011 10:59:52 -0700 [thread overview]
Message-ID: <1315936796-20662-16-git-send-email-kys@microsoft.com> (raw)
In-Reply-To: <1315936796-20662-1-git-send-email-kys@microsoft.com>
struct hv_device_info is about 101 bytes in size. Do not allocate this structure
on the stack.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/staging/hv/vmbus_drv.c | 134 ++++++++++++++++++++-------------------
1 files changed, 69 insertions(+), 65 deletions(-)
diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
index 466425a..d2562af 100644
--- a/drivers/staging/hv/vmbus_drv.c
+++ b/drivers/staging/hv/vmbus_drv.c
@@ -112,101 +112,105 @@ static ssize_t vmbus_show_device_attr(struct device *dev,
char *buf)
{
struct hv_device *hv_dev = device_to_hv_device(dev);
- struct hv_device_info device_info;
+ struct hv_device_info *device_info;
char alias_name[VMBUS_ALIAS_LEN + 1];
+ int ret = 0;
- memset(&device_info, 0, sizeof(struct hv_device_info));
+ device_info = kzalloc(sizeof(struct hv_device_info), GFP_KERNEL);
+ if (!device_info)
+ return ret;
- get_channel_info(hv_dev, &device_info);
+ get_channel_info(hv_dev, device_info);
if (!strcmp(dev_attr->attr.name, "class_id")) {
- return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
+ ret = sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}\n",
- device_info.chn_type.b[3],
- device_info.chn_type.b[2],
- device_info.chn_type.b[1],
- device_info.chn_type.b[0],
- device_info.chn_type.b[5],
- device_info.chn_type.b[4],
- device_info.chn_type.b[7],
- device_info.chn_type.b[6],
- device_info.chn_type.b[8],
- device_info.chn_type.b[9],
- device_info.chn_type.b[10],
- device_info.chn_type.b[11],
- device_info.chn_type.b[12],
- device_info.chn_type.b[13],
- device_info.chn_type.b[14],
- device_info.chn_type.b[15]);
+ device_info->chn_type.b[3],
+ device_info->chn_type.b[2],
+ device_info->chn_type.b[1],
+ device_info->chn_type.b[0],
+ device_info->chn_type.b[5],
+ device_info->chn_type.b[4],
+ device_info->chn_type.b[7],
+ device_info->chn_type.b[6],
+ device_info->chn_type.b[8],
+ device_info->chn_type.b[9],
+ device_info->chn_type.b[10],
+ device_info->chn_type.b[11],
+ device_info->chn_type.b[12],
+ device_info->chn_type.b[13],
+ device_info->chn_type.b[14],
+ device_info->chn_type.b[15]);
} else if (!strcmp(dev_attr->attr.name, "device_id")) {
- return sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
+ ret = sprintf(buf, "{%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x%02x%02x%02x%02x%02x%02x}\n",
- device_info.chn_instance.b[3],
- device_info.chn_instance.b[2],
- device_info.chn_instance.b[1],
- device_info.chn_instance.b[0],
- device_info.chn_instance.b[5],
- device_info.chn_instance.b[4],
- device_info.chn_instance.b[7],
- device_info.chn_instance.b[6],
- device_info.chn_instance.b[8],
- device_info.chn_instance.b[9],
- device_info.chn_instance.b[10],
- device_info.chn_instance.b[11],
- device_info.chn_instance.b[12],
- device_info.chn_instance.b[13],
- device_info.chn_instance.b[14],
- device_info.chn_instance.b[15]);
+ device_info->chn_instance.b[3],
+ device_info->chn_instance.b[2],
+ device_info->chn_instance.b[1],
+ device_info->chn_instance.b[0],
+ device_info->chn_instance.b[5],
+ device_info->chn_instance.b[4],
+ device_info->chn_instance.b[7],
+ device_info->chn_instance.b[6],
+ device_info->chn_instance.b[8],
+ device_info->chn_instance.b[9],
+ device_info->chn_instance.b[10],
+ device_info->chn_instance.b[11],
+ device_info->chn_instance.b[12],
+ device_info->chn_instance.b[13],
+ device_info->chn_instance.b[14],
+ device_info->chn_instance.b[15]);
} else if (!strcmp(dev_attr->attr.name, "modalias")) {
print_alias_name(hv_dev, alias_name);
- return sprintf(buf, "vmbus:%s\n", alias_name);
+ ret = sprintf(buf, "vmbus:%s\n", alias_name);
} else if (!strcmp(dev_attr->attr.name, "state")) {
- return sprintf(buf, "%d\n", device_info.chn_state);
+ ret = sprintf(buf, "%d\n", device_info->chn_state);
} else if (!strcmp(dev_attr->attr.name, "id")) {
- return sprintf(buf, "%d\n", device_info.chn_id);
+ ret = sprintf(buf, "%d\n", device_info->chn_id);
} else if (!strcmp(dev_attr->attr.name, "out_intr_mask")) {
- return sprintf(buf, "%d\n", device_info.outbound.int_mask);
+ ret = sprintf(buf, "%d\n", device_info->outbound.int_mask);
} else if (!strcmp(dev_attr->attr.name, "out_read_index")) {
- return sprintf(buf, "%d\n", device_info.outbound.read_idx);
+ ret = sprintf(buf, "%d\n", device_info->outbound.read_idx);
} else if (!strcmp(dev_attr->attr.name, "out_write_index")) {
- return sprintf(buf, "%d\n", device_info.outbound.write_idx);
+ ret = sprintf(buf, "%d\n", device_info->outbound.write_idx);
} else if (!strcmp(dev_attr->attr.name, "out_read_bytes_avail")) {
- return sprintf(buf, "%d\n",
- device_info.outbound.bytes_avail_toread);
+ ret = sprintf(buf, "%d\n",
+ device_info->outbound.bytes_avail_toread);
} else if (!strcmp(dev_attr->attr.name, "out_write_bytes_avail")) {
- return sprintf(buf, "%d\n",
- device_info.outbound.bytes_avail_towrite);
+ ret = sprintf(buf, "%d\n",
+ device_info->outbound.bytes_avail_towrite);
} else if (!strcmp(dev_attr->attr.name, "in_intr_mask")) {
- return sprintf(buf, "%d\n", device_info.inbound.int_mask);
+ ret = sprintf(buf, "%d\n", device_info->inbound.int_mask);
} else if (!strcmp(dev_attr->attr.name, "in_read_index")) {
- return sprintf(buf, "%d\n", device_info.inbound.read_idx);
+ ret = sprintf(buf, "%d\n", device_info->inbound.read_idx);
} else if (!strcmp(dev_attr->attr.name, "in_write_index")) {
- return sprintf(buf, "%d\n", device_info.inbound.write_idx);
+ ret = sprintf(buf, "%d\n", device_info->inbound.write_idx);
} else if (!strcmp(dev_attr->attr.name, "in_read_bytes_avail")) {
- return sprintf(buf, "%d\n",
- device_info.inbound.bytes_avail_toread);
+ ret = sprintf(buf, "%d\n",
+ device_info->inbound.bytes_avail_toread);
} else if (!strcmp(dev_attr->attr.name, "in_write_bytes_avail")) {
- return sprintf(buf, "%d\n",
- device_info.inbound.bytes_avail_towrite);
+ ret = sprintf(buf, "%d\n",
+ device_info->inbound.bytes_avail_towrite);
} else if (!strcmp(dev_attr->attr.name, "monitor_id")) {
- return sprintf(buf, "%d\n", device_info.monitor_id);
+ ret = sprintf(buf, "%d\n", device_info->monitor_id);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_pending")) {
- return sprintf(buf, "%d\n", device_info.server_monitor_pending);
+ ret = sprintf(buf, "%d\n", device_info->server_monitor_pending);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_latency")) {
- return sprintf(buf, "%d\n", device_info.server_monitor_latency);
+ ret = sprintf(buf, "%d\n", device_info->server_monitor_latency);
} else if (!strcmp(dev_attr->attr.name, "server_monitor_conn_id")) {
- return sprintf(buf, "%d\n",
- device_info.server_monitor_conn_id);
+ ret = sprintf(buf, "%d\n",
+ device_info->server_monitor_conn_id);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_pending")) {
- return sprintf(buf, "%d\n", device_info.client_monitor_pending);
+ ret = sprintf(buf, "%d\n", device_info->client_monitor_pending);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_latency")) {
- return sprintf(buf, "%d\n", device_info.client_monitor_latency);
+ ret = sprintf(buf, "%d\n", device_info->client_monitor_latency);
} else if (!strcmp(dev_attr->attr.name, "client_monitor_conn_id")) {
- return sprintf(buf, "%d\n",
- device_info.client_monitor_conn_id);
- } else {
- return 0;
+ ret = sprintf(buf, "%d\n",
+ device_info->client_monitor_conn_id);
}
+
+ kfree(device_info);
+ return ret;
}
/* Set up per device attributes in /sys/bus/vmbus/devices/<bus device> */
--
1.7.4.1
next prev parent reply other threads:[~2011-09-13 17:39 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-13 17:59 [PATCH 0000/0020] Staging: hv: Driver cleanup K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 01/20] Staging: hv: vmbus: Introduce a utility function to match hv_vmbus_device_id K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 02/20] Staging: hv: vmbus: Change the signature of struct hv_driver probe function K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 03/20] Staging: hv: storvsc: Use the driver_data to identify ide K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 04/20] Staging: hv: vmbus: Introduce functions for setting and getting driver data K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 05/20] Staging: hv: util: Perform some service specific init/deinit in probe/remove K. Y. Srinivasan
2011-09-16 18:01 ` Greg KH
2011-09-13 17:59 ` [PATCH 06/20] Staging: hv: util: Properly handle util services in the util driver K. Y. Srinivasan
2011-09-15 20:08 ` Dan Carpenter
2011-09-15 20:24 ` KY Srinivasan
2011-09-16 18:03 ` Greg KH
2011-09-17 13:26 ` KY Srinivasan
2011-09-13 17:59 ` [PATCH 07/20] Staging: hv: vmbus: Get rid of hv_cb_utils[] and other unneeded code K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 08/20] Staging: hv: vmbus: Cleanup vmbus_remove() K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 09/20] Staging: hv: storvsc: Get rid of storvsc_dev_add() by inlining the code K. Y. Srinivasan
2011-09-13 18:39 ` Christoph Hellwig
2011-09-13 18:52 ` KY Srinivasan
2011-09-13 17:59 ` [PATCH 10/20] Staging: hv: storvsc: Get rid of alloc_stor_device() " K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 11/20] Staging: hv: storvsc: Get rid of some unnecessary state and definitions K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 12/20] Staging: hv: storvsc: Eliminate the usage of ext field in struct hv_device K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 13/20] Staging: hv: netvsc: Get rid of the usage of the " K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 14/20] Staging: hv: mousevsc: " K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 15/20] Staging: hv: vmbus: Get rid " K. Y. Srinivasan
2011-09-13 17:59 ` K. Y. Srinivasan [this message]
2011-09-13 18:41 ` [PATCH 16/20] Staging: hv: vmbus: Do not allocate struct hv_device_info on the stack Christoph Hellwig
2011-09-13 17:59 ` [PATCH 17/20] Staging: hv: vmbus: Get rid of the module dependency K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 18/20] Staging: hv: netvsc: Rename netDevice as net_device K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 19/20] Staging: hv: netvsc: Rename rndisDevice to rndis_device K. Y. Srinivasan
2011-09-13 17:59 ` [PATCH 20/20] Staging: hv: netvsc: Rename deviceInfo as device_info K. Y. Srinivasan
2011-09-13 18:10 ` Joe Perches
2011-09-13 18:15 ` KY Srinivasan
2011-09-16 18:07 ` [PATCH 0000/0020] Staging: hv: Driver cleanup Greg KH
2011-09-17 13:26 ` KY Srinivasan
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=1315936796-20662-16-git-send-email-kys@microsoft.com \
--to=kys@microsoft.com \
--cc=devel@linuxdriverproject.org \
--cc=gregkh@suse.de \
--cc=haiyangz@microsoft.com \
--cc=linux-kernel@vger.kernel.org \
--cc=virtualization@lists.osdl.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