static void gdrom_spicommand()

in gdrom.c [175:203]

• 24 lines of code
• 5 McCabe index (conditional complexity)

static void gdrom_spicommand(void *spi_string, int buflen)
{
	short *cmd = spi_string;
	unsigned long timeout;

	/* ensure IRQ_WAIT is set */
	__raw_writeb(0x08, GDROM_ALTSTATUS_REG);
	/* specify how many bytes we expect back */
	__raw_writeb(buflen & 0xFF, GDROM_BCL_REG);
	__raw_writeb((buflen >> 8) & 0xFF, GDROM_BCH_REG);
	/* other parameters */
	__raw_writeb(0, GDROM_INTSEC_REG);
	__raw_writeb(0, GDROM_SECNUM_REG);
	__raw_writeb(0, GDROM_ERROR_REG);
	/* Wait until we can go */
	if (!gdrom_wait_clrbusy()) {
		gdrom_getsense(NULL);
		return;
	}
	timeout = jiffies + GDROM_DEFAULT_TIMEOUT;
	__raw_writeb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
	while (!gdrom_data_request() && time_before(jiffies, timeout))
		cpu_relax();
	if (!time_before(jiffies, timeout + 1)) {
		gdrom_getsense(NULL);
		return;
	}
	outsw(GDROM_DATA_REG, cmd, 6);
}