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authorJoe Perches <joe@perches.com>2017-02-08 12:33:36 +0100
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-02-08 16:09:09 +0100
commitc0d197d55e8e8aeeea55f79bdf67e1c957bfa25d (patch)
tree7edcfb440ddbb1c578ba31c2b43cc8bbbc034dcf /drivers/xen/xenbus
parentxen/pvh: Use Xen's emergency_restart op for PVH guests (diff)
downloadlinux-c0d197d55e8e8aeeea55f79bdf67e1c957bfa25d.tar.xz
linux-c0d197d55e8e8aeeea55f79bdf67e1c957bfa25d.zip
xenbus: Neaten xenbus_va_dev_error
This function error patch can be simplified, so do so. Remove fail: label and somewhat obfuscating, used once "error_path" function. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/xenbus')
-rw-r--r--drivers/xen/xenbus/xenbus_client.c39
1 files changed, 10 insertions, 29 deletions
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 056da6ee1a35..915d77785193 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -259,53 +259,34 @@ int xenbus_frontend_closed(struct xenbus_device *dev)
}
EXPORT_SYMBOL_GPL(xenbus_frontend_closed);
-/**
- * Return the path to the error node for the given device, or NULL on failure.
- * If the value returned is non-NULL, then it is the caller's to kfree.
- */
-static char *error_path(struct xenbus_device *dev)
-{
- return kasprintf(GFP_KERNEL, "error/%s", dev->nodename);
-}
-
-
static void xenbus_va_dev_error(struct xenbus_device *dev, int err,
const char *fmt, va_list ap)
{
unsigned int len;
- char *printf_buffer = NULL;
- char *path_buffer = NULL;
+ char *printf_buffer;
+ char *path_buffer;
#define PRINTF_BUFFER_SIZE 4096
+
printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_KERNEL);
- if (printf_buffer == NULL)
- goto fail;
+ if (!printf_buffer)
+ return;
len = sprintf(printf_buffer, "%i ", -err);
- vsnprintf(printf_buffer+len, PRINTF_BUFFER_SIZE-len, fmt, ap);
+ vsnprintf(printf_buffer + len, PRINTF_BUFFER_SIZE - len, fmt, ap);
dev_err(&dev->dev, "%s\n", printf_buffer);
- path_buffer = error_path(dev);
-
- if (path_buffer == NULL) {
+ path_buffer = kasprintf(GFP_KERNEL, "error/%s", dev->nodename);
+ if (!path_buffer ||
+ xenbus_write(XBT_NIL, path_buffer, "error", printf_buffer))
dev_err(&dev->dev, "failed to write error node for %s (%s)\n",
- dev->nodename, printf_buffer);
- goto fail;
- }
+ dev->nodename, printf_buffer);
- if (xenbus_write(XBT_NIL, path_buffer, "error", printf_buffer) != 0) {
- dev_err(&dev->dev, "failed to write error node for %s (%s)\n",
- dev->nodename, printf_buffer);
- goto fail;
- }
-
-fail:
kfree(printf_buffer);
kfree(path_buffer);
}
-
/**
* xenbus_dev_error
* @dev: xenbus device