修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/arch/xtensa/platforms/iss/simdisk.c
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@@ -101,9 +101,9 @@
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 	spin_unlock(&dev->lock);
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 }
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103
 
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-static blk_qc_t simdisk_make_request(struct request_queue *q, struct bio *bio)
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+static blk_qc_t simdisk_submit_bio(struct bio *bio)
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 {
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-	struct simdisk *dev = q->queuedata;
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+	struct simdisk *dev = bio->bi_disk->private_data;
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 	struct bio_vec bvec;
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 	struct bvec_iter iter;
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 	sector_t sector = bio->bi_iter.bi_sector;
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@@ -127,8 +127,6 @@
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 	struct simdisk *dev = bdev->bd_disk->private_data;
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128
 
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 	spin_lock(&dev->lock);
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-	if (!dev->users)
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-		check_disk_change(bdev);
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 	++dev->users;
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 	spin_unlock(&dev->lock);
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 	return 0;
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@@ -144,6 +142,7 @@
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142
 
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 static const struct block_device_operations simdisk_ops = {
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 	.owner		= THIS_MODULE,
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+	.submit_bio	= simdisk_submit_bio,
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 	.open		= simdisk_open,
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 	.release	= simdisk_release,
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 };
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@@ -214,12 +213,18 @@
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 	struct simdisk *dev = PDE_DATA(file_inode(file));
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 	const char *s = dev->filename;
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 	if (s) {
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-		ssize_t n = simple_read_from_buffer(buf, size, ppos,
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-							s, strlen(s));
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-		if (n < 0)
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-			return n;
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-		buf += n;
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-		size -= n;
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+		ssize_t len = strlen(s);
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+		char *temp = kmalloc(len + 2, GFP_KERNEL);
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+
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+		if (!temp)
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+			return -ENOMEM;
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+
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+		len = scnprintf(temp, len + 2, "%s\n", s);
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+		len = simple_read_from_buffer(buf, size, ppos,
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+					      temp, len);
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+
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+		kfree(temp);
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+		return len;
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 	}
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 	return simple_read_from_buffer(buf, size, ppos, "\n", 1);
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 }
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@@ -251,10 +256,10 @@
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 	return err;
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 }
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258
 
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-static const struct file_operations fops = {
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-	.read = proc_read_simdisk,
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-	.write = proc_write_simdisk,
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-	.llseek = default_llseek,
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+static const struct proc_ops simdisk_proc_ops = {
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+	.proc_read	= proc_read_simdisk,
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+	.proc_write	= proc_write_simdisk,
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+	.proc_lseek	= default_llseek,
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 };
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264
 
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 static int __init simdisk_setup(struct simdisk *dev, int which,
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@@ -267,14 +272,11 @@
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 	spin_lock_init(&dev->lock);
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 	dev->users = 0;
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-	dev->queue = blk_alloc_queue(GFP_KERNEL);
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+	dev->queue = blk_alloc_queue(NUMA_NO_NODE);
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 	if (dev->queue == NULL) {
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 		pr_err("blk_alloc_queue failed\n");
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 		goto out_alloc_queue;
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 	}
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-
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-	blk_queue_make_request(dev->queue, simdisk_make_request);
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-	dev->queue->queuedata = dev;
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280
 
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 	dev->gd = alloc_disk(SIMDISK_MINORS);
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 	if (dev->gd == NULL) {
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@@ -290,15 +292,14 @@
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 	set_capacity(dev->gd, 0);
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 	add_disk(dev->gd);
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-	dev->procfile = proc_create_data(tmp, 0644, procdir, &fops, dev);
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+	dev->procfile = proc_create_data(tmp, 0644, procdir, &simdisk_proc_ops, dev);
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 	return 0;
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 out_alloc_disk:
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 	blk_cleanup_queue(dev->queue);
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 	dev->queue = NULL;
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 out_alloc_queue:
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-	simc_close(dev->fd);
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-	return -EIO;
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+	return -ENOMEM;
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 }
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 static int __init simdisk_init(void)