From ce684d957c5672f3bb55e6b0872932b5b4c39c56 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 31 Jul 2019 12:00:06 +0200 Subject: [PATCH] devcoredump: use memory_read_from_buffer Use memory_read_from_buffer() to simplify devcd_readv(). Reviewed-by: Chaitanya Kulkarni Reviewed-by: Johannes Berg Signed-off-by: Akinobu Mita Link: https://lore.kernel.org/r/1564243146-5681-2-git-send-email-akinobu.mita@gmail.com Signed-off-by: Johannes Berg Link: https://lore.kernel.org/r/20190731100007.32684-1-johannes@sipsolutions.net Signed-off-by: Greg Kroah-Hartman --- 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 f1a3353f3494..3c960a63062f 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)