From c0d197d55e8e8aeeea55f79bdf67e1c957bfa25d Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Wed, 8 Feb 2017 03:33:36 -0800 Subject: 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 Signed-off-by: Boris Ostrovsky --- drivers/xen/xenbus/xenbus_client.c | 39 ++++++++++---------------------------- 1 file changed, 10 insertions(+), 29 deletions(-) (limited to 'drivers/xen/xenbus') diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c index 056da6e..915d777 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 -- cgit v1.1