The purpose of scsi_reset() is to reset the adapter hardware and possibly the attached bus, for example by asserting the reset line on the bus for at least 25 microseconds. The prototype of the function is
int (*scsi_reset[adapter-type])(uchar adap);
The adapter number is reset and a nonzero value is returned. If the host adapter driver does not support this function, or if it is unable to reset the hardware, it returns 0.