From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org
Cc: stable-review@kernel.org, torvalds@linux-foundation.org,
akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Stuart Hayes <stuart_hayes@yahoo.com>,
Doug Warzecha <douglas_warzecha@dell.com>,
Chuck Ebbert <cebbert@redhat.com>, Jiri Kosina <jkosina@suse.cz>
Subject: [35/35] dcdbas: force SMI to happen when expected
Date: Fri, 25 Mar 2011 17:04:07 -0700 [thread overview]
Message-ID: <20110326000459.487179626@clark.kroah.org> (raw)
In-Reply-To: <20110326000509.GA29736@kroah.com>
2.6.33-longterm review patch. If anyone has any objections, please let us know.
------------------
From: Stuart Hayes <stuart_hayes@yahoo.com>
commit dd65c736d1b5312c80c88a64bf521db4959eded5 upstream.
The dcdbas driver can do an I/O write to cause a SMI to occur. The SMI handler
looks at certain registers and memory locations, so the SMI needs to happen
immediately. On some systems I/O writes are posted, though, causing the SMI to
happen well after the "outb" occurred, which causes random failures. Following
the "outb" with an "inb" forces the write to go through even if it is posted.
Signed-off-by: Stuart Hayes <stuart_hayes@yahoo.com>
Acked-by: Doug Warzecha <douglas_warzecha@dell.com>
Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/firmware/dcdbas.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/firmware/dcdbas.c
+++ b/drivers/firmware/dcdbas.c
@@ -267,8 +267,10 @@ int dcdbas_smi_request(struct smi_cmd *s
}
/* generate SMI */
+ /* inb to force posted write through and make SMI happen now */
asm volatile (
- "outb %b0,%w1"
+ "outb %b0,%w1\n"
+ "inb %w1"
: /* no output args */
: "a" (smi_cmd->command_code),
"d" (smi_cmd->command_address),
prev parent reply other threads:[~2011-03-26 0:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-26 0:05 [00/35] 2.6.33.9-longterm review Greg KH
2011-03-26 0:03 ` [01/35] smp_call_function_many: handle concurrent clearing of mask Greg KH
2011-03-26 0:03 ` [02/35] [PARISC] fix per-cpu flag problem in the cpu affinity checkers Greg KH
2011-03-26 0:03 ` [03/35] i2c: Fix typo in instantiating-devices document Greg KH
2011-03-26 0:03 ` [04/35] mmc: sdio: remember new card RCA when redetecting card Greg KH
2011-03-26 0:03 ` [05/35] powerpc/kdump: Fix race in kdump shutdown Greg KH
2011-03-30 23:27 ` Paul Gortmaker
2011-04-11 22:57 ` [stable] " Greg KH
2011-03-26 0:03 ` [06/35] powerpc: rtas_flash needs to use rtas_data_buf Greg KH
2011-03-26 0:03 ` [07/35] x86, binutils, xen: Fix another wrong size directive Greg KH
2011-03-26 0:03 ` [08/35] hwmon: (sht15) Fix integer overflow in humidity calculation Greg KH
2011-03-26 0:03 ` [09/35] ALSA: hda - VIA: Fix stereo mixer recording no sound issue Greg KH
2011-03-26 0:03 ` [10/35] ALSA: hda - VIA: Add missing support for VT1718S in A-A path Greg KH
2011-03-26 0:03 ` [11/35] aio: wake all waiters when destroying ctx Greg KH
2011-03-26 0:03 ` [12/35] shmem: let shared anonymous be nonlinear again Greg KH
2011-03-26 0:03 ` [13/35] PCI hotplug: acpiphp: set current_state to D0 in register_slot Greg KH
2011-03-26 0:03 ` [14/35] xen: set max_pfn_mapped to the last pfn mapped Greg KH
2011-03-26 0:03 ` [15/35] PCI: return correct value when writing to the "reset" attribute Greg KH
2011-03-26 0:03 ` [16/35] [PATCH] Revert "intel_idle: PCI quirk to prevent Lenovo Ideapad s10-3 boot hang" Greg KH
2011-03-26 0:03 ` [17/35] Prevent rt_sigqueueinfo and rt_tgsigqueueinfo from spoofing the signal code Greg KH
2011-03-26 0:03 ` [18/35] ext3: skip orphan cleanup on rocompat fs Greg KH
2011-03-26 0:03 ` [19/35] procfs: fix /proc/<pid>/maps heap check Greg KH
2011-03-26 0:03 ` [20/35] proc: protect mm start_code/end_code in /proc/pid/stat Greg KH
2011-03-26 0:03 ` [21/35] fbcon: Bugfix soft cursor detection in Tile Blitting Greg KH
2011-03-26 0:03 ` [22/35] nfsd41: modify the members value of nfsd4_op_flags Greg KH
2011-03-26 0:03 ` [23/35] nfsd: wrong index used in inner loop Greg KH
2011-03-26 0:03 ` [24/35] [media] uvcvideo: Fix uvc_fixup_video_ctrl() format search Greg KH
2011-03-26 0:03 ` [25/35] [media] uvcvideo: Fix descriptor parsing for video output devices Greg KH
2011-03-26 0:03 ` [26/35] ehci-hcd: Bug fix: dont set a QHs Halt bit Greg KH
2011-03-26 0:03 ` [27/35] USB: uss720 fixup refcount position Greg KH
2011-03-26 0:04 ` [28/35] USB: cdc-acm: fix memory corruption / panic Greg KH
2011-03-26 0:04 ` [29/35] USB: cdc-acm: fix potential null-pointer dereference Greg KH
2011-03-26 0:04 ` [30/35] USB: cdc-acm: fix potential null-pointer dereference on disconnect Greg KH
2011-03-26 0:04 ` [31/35] Input: xen-kbdfront - advertise either absolute or relative coordinates Greg KH
2011-03-26 0:04 ` [32/35] x86: Cleanup highmap after brk is concluded Greg KH
2011-03-26 0:04 ` [33/35] SUNRPC: Never reuse the socket port after an xs_close() Greg KH
2011-03-26 0:04 ` [34/35] fs: call security_d_instantiate in d_obtain_alias V2 Greg KH
2011-03-26 0:24 ` Casey Schaufler
2011-03-26 16:11 ` Josef Bacik
2011-03-26 0:04 ` Greg KH [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110326000459.487179626@clark.kroah.org \
--to=gregkh@suse.de \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=cebbert@redhat.com \
--cc=douglas_warzecha@dell.com \
--cc=jkosina@suse.cz \
--cc=linux-kernel@vger.kernel.org \
--cc=stable-review@kernel.org \
--cc=stable@kernel.org \
--cc=stuart_hayes@yahoo.com \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®