From bbe413b4fc7f791248c7ee00ce7b3778491a3700 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 27 Jun 2008 16:57:16 -0600 Subject: [PATCH] ISAPNP: handle independent options following dependent ones The ISAPNP spec recommends that independent options precede dependent ones, but this is not actually required. The current ISAPNP code incorrectly puts such trailing independent options at the end of the last dependent option list. This patch fixes that bug by resetting the current option list to the independent list when we see an "End Dependent Functions" tag. PNPBIOS and PNPACPI handle this the same way. Signed-off-by: Bjorn Helgaas Signed-off-by: Andi Kleen Acked-by: Rene Herman Signed-off-by: Len Brown --- drivers/pnp/isapnp/core.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c index 90718be664..53cc4d6133 100644 --- a/drivers/pnp/isapnp/core.c +++ b/drivers/pnp/isapnp/core.c @@ -584,14 +584,14 @@ static int __init isapnp_create_device(struct pnp_card *card, { int number = 0, skip = 0, priority, compat = 0; unsigned char type, tmp[17]; - struct pnp_option *option; + struct pnp_option *option, *option_independent; struct pnp_dev *dev; u32 eisa_id; char id[8]; if ((dev = isapnp_parse_device(card, size, number++)) == NULL) return 1; - option = pnp_register_independent_option(dev); + option_independent = option = pnp_register_independent_option(dev); if (!option) { kfree(dev); return 1; @@ -613,6 +613,7 @@ static int __init isapnp_create_device(struct pnp_card *card, size = 0; skip = 0; option = pnp_register_independent_option(dev); + option_independent = option; if (!option) { kfree(dev); return 1; @@ -662,6 +663,10 @@ static int __init isapnp_create_device(struct pnp_card *card, case _STAG_ENDDEP: if (size != 0) goto __skip; + if (option_independent == option) + dev_warn(&dev->dev, "missing " + "_STAG_STARTDEP tag\n"); + option = option_independent; dev_dbg(&dev->dev, "end dependent options\n"); break; case _STAG_IOPORT: -- 2.39.5