diff options
| author | jmcneill <jmcneill@NetBSD.org> | 2022-04-18 10:09:07 +0000 |
|---|---|---|
| committer | jmcneill <jmcneill@NetBSD.org> | 2022-04-18 10:09:07 +0000 |
| commit | ed5819357fef80ff33de2a828a025c8ff6ca27d3 (patch) | |
| tree | db9d015ea654e4b7d1635c623b807a1fa3cfae31 /sys/dev/isa | |
| parent | 91110ef3adb94c3a1a1474edea9a3046495f9aa6 (diff) | |
Do not attach if the parent bus failed to provide an ISA chipset tag.
Diffstat (limited to 'sys/dev/isa')
| -rw-r--r-- | sys/dev/isa/fdc_isa.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sys/dev/isa/fdc_isa.c b/sys/dev/isa/fdc_isa.c index 9b6c35cb41c..4862c271c3b 100644 --- a/sys/dev/isa/fdc_isa.c +++ b/sys/dev/isa/fdc_isa.c @@ -1,4 +1,4 @@ -/* $NetBSD: fdc_isa.c,v 1.20 2015/04/13 16:33:24 riastradh Exp $ */ +/* $NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. @@ -64,7 +64,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.20 2015/04/13 16:33:24 riastradh Exp $"); +__KERNEL_RCSID(0, "$NetBSD: fdc_isa.c,v 1.21 2022/04/18 10:09:07 jmcneill Exp $"); #include <sys/param.h> #include <sys/systm.h> @@ -131,6 +131,10 @@ fdc_isa_probe(device_t parent, cfdata_t match, void *aux) if (ia->ia_drq[0].ir_drq == ISA_UNKNOWN_DRQ) return (0); + /* ISA chipset tag is required for DMA support. */ + if (ia->ia_ic == NULL) + return (0); + /* Map the I/O space. */ iobase = ia->ia_io[0].ir_addr; if (bus_space_map(iot, iobase, 6 /* FDC_NPORT */, 0, &base_ioh)) |
