generic: refresh patch (coolsnowwolf#3774)

* generic-4.19: refresh patch

* generic-4.9: refresh patch

cherry-pick 2515a5e from @1715173329 dalao

target/linux/generic/hack-4.19/550-loop-Report-EOPNOTSUPP-properly.patch

@@ -26,7 +26,7 @@ Reviewed-by: Bart Van Assche <[email protected]>
 +			ret = errno_to_blk_status(cmd->ret);
  		goto end_io;
  	}
-
+ 
 @@ -1904,7 +1904,10 @@ static void loop_handle_cmd(struct loop_
   failed:
  	/* complete non-aio request */

target/linux/generic/hack-4.19/551-loop-Better-discard-support-for-block-devices.patch

@@ -34,9 +34,9 @@ Reviewed-by: Chaitanya Kulkarni <[email protected]>
  	struct file *file = lo->lo_backing_file;
 +	struct request_queue *q = lo->lo_queue;
  	int ret;
-
+ 
  	mode |= FALLOC_FL_KEEP_SIZE;
-
+ 
 -	if ((!file->f_op->fallocate) || lo->lo_encrypt_key_size) {
 +	if (!blk_queue_discard(q)) {
  		ret = -EOPNOTSUPP;
@@ -61,7 +61,7 @@ Reviewed-by: Chaitanya Kulkarni <[email protected]>
 +
 +		blk_queue_max_write_zeroes_sectors(q,
 +			backingq->limits.max_write_zeroes_sectors);
-
+ 
  	/*
  	 * We use punch hole to reclaim the free space used by the
 @@ -870,22 +886,24 @@ static void loop_config_discard(struct l
@@ -78,13 +78,13 @@ Reviewed-by: Chaitanya Kulkarni <[email protected]>
 -		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
 -		return;
 -	}
-
+ 
 -	q->limits.discard_granularity = inode->i_sb->s_blocksize;
 -	q->limits.discard_alignment = 0;
 +	} else {
 +		q->limits.discard_granularity = inode->i_sb->s_blocksize;
 +		q->limits.discard_alignment = 0;
-
+ 
 -	blk_queue_max_discard_sectors(q, UINT_MAX >> 9);
 -	blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9);
 -	blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
@@ -97,5 +97,5 @@ Reviewed-by: Chaitanya Kulkarni <[email protected]>
 +	else
 +		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
  }
-
+ 
  static void loop_unprepare_queue(struct loop_device *lo)