static void simdisk_transfer()

in platforms/iss/simdisk.c [70:101]

• 29 lines of code
• 7 McCabe index (conditional complexity)

static void simdisk_transfer(struct simdisk *dev, unsigned long sector,
		unsigned long nsect, char *buffer, int write)
{
	unsigned long offset = sector << SECTOR_SHIFT;
	unsigned long nbytes = nsect << SECTOR_SHIFT;

	if (offset > dev->size || dev->size - offset < nbytes) {
		pr_notice("Beyond-end %s (%ld %ld)\n",
				write ? "write" : "read", offset, nbytes);
		return;
	}

	spin_lock(&dev->lock);
	while (nbytes > 0) {
		unsigned long io;

		simc_lseek(dev->fd, offset, SEEK_SET);
		READ_ONCE(*buffer);
		if (write)
			io = simc_write(dev->fd, buffer, nbytes);
		else
			io = simc_read(dev->fd, buffer, nbytes);
		if (io == -1) {
			pr_err("SIMDISK: IO error %d\n", errno);
			break;
		}
		buffer += io;
		offset += io;
		nbytes -= io;
	}
	spin_unlock(&dev->lock);
}