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devcoredump: use memory_read_from_buffer

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Use memory_read_from_buffer() to simplify devcd_readv().

Reviewed-by: Chaitanya Kulkarni <[email protected]>
Reviewed-by: Johannes Berg <[email protected]>
Signed-off-by: Akinobu Mita <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Johannes Berg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Akinobu Mita 2019-07-31 12:00:06 +02:00 • committed by Greg Kroah-Hartman
commit ce684d957c
1 changed files with 1 additions and 10 deletions
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11
drivers/base/devcoredump.c
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@ -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)