- Add a new ioctl to get the maximum number of ATA channels.

- Use it in atacontrol(8) when listing ATA devices instead of
  stopping at the first ENXIO received.

This makes atacontrol list work on my sparc64 where the two ATA
channels I have are numbered 2 and 3.

Reviewed by:	sos

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/dev/ata/ata-all.c b/sys/dev/ata/ata-all.c
index 67da2a0..56a7d29 100644
--- a/sys/dev/ata/ata-all.c
+++ b/sys/dev/ata/ata-all.c
@@ -304,6 +304,11 @@ ataioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct thread *td)
     if (cmd != IOCATA)
 	return ENOTTY;
     
+    if (iocmd->cmd == ATAGMAXCHANNEL) {
+	iocmd->u.maxchan = devclass_get_maxunit(ata_devclass);
+	return 0;
+    }
+
     if (iocmd->channel < -1 || iocmd->device < -1 || iocmd->device > SLAVE)
 	return ENXIO;