Date: Mon, 19 May 2014 22:12:50 +0200 From: Hans Petter Selasky <hps@selasky.org> To: John Baldwin <jhb@FreeBSD.org>, freebsd-current <freebsd-current@freebsd.org> Subject: Re: panic: resource_list_add: resource entry is busy Message-ID: <537A65C2.6060203@selasky.org> In-Reply-To: <5379200E.8080602@selasky.org> References: <53763B0F.4040003@selasky.org> <5377529C.3000508@FreeBSD.org> <53791D78.3070305@selasky.org> <5379200E.8080602@selasky.org>
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[-- Attachment #1 --]
On 05/18/14 23:03, Hans Petter Selasky wrote:
> Hi,
>
> First call:
>
> resource_list_add:
Hi,
It appears that the /dev/pccard.X is opened and reading some CIS data
from the device before any driver has been attached. The attached patch
solves the panic I've seen. Not sure if the patch is correct.
--HPS
[-- Attachment #2 --]
diff --git a/sys/dev/pccard/pccard_cis.c b/sys/dev/pccard/pccard_cis.c
index dbd7165..2914a37 100644
--- a/sys/dev/pccard/pccard_cis.c
+++ b/sys/dev/pccard/pccard_cis.c
@@ -133,6 +133,10 @@ pccard_scan_cis(device_t bus, device_t dev, pccard_scan_t fct, void *arg)
/* allocate some memory */
+ if (device_get_state(dev) == DS_NOTPRESENT) {
+ return (-1);
+ }
+
/*
* Some reports from the field suggest that a 64k memory boundary
* helps card CIS being able to be read. Try it here and see what
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