diff options
| -rw-r--r-- | spi.c | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -227,12 +227,15 @@ static int it8716f_spi_command(uint16_t port, unsigned int writecnt, unsigned in * We can't use writecnt directly, but have to use a strange encoding. */ outb(((0x4 + (fast_spi ? 1 : 0)) << 4) | ((readcnt & 0x3) << 2) | (writeenc), port); - do { - busy = inb(port) & 0x80; - } while (busy); - for (i = 0; i < readcnt; i++) { - readarr[i] = inb(port + 5 + i); + if (readcnt > 0) { + do { + busy = inb(port) & 0x80; + } while (busy); + + for (i = 0; i < readcnt; i++) { + readarr[i] = inb(port + 5 + i); + } } return 0; |