linux-kernel - [PATCH v3 5/6] staging/fwserial: Assume firmware is OHCI-complaint

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1359424669-5723-6-git-send-email-peter@hurleysoftware.com>
Date:	Mon, 28 Jan 2013 20:57:48 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org,
	linux1394-devel@...ts.sourceforge.net,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v3 5/6] staging/fwserial: Assume firmware is OHCI-complaint

Devices which are OHCI v1.0/ v1.1/ v1.2-draft compliant or
RFC 2734 compliant are required by specification to support
max_rec of 8 (512 bytes) or more. Accept reported value.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/staging/fwserial/fwserial.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index 940639f..48523eb 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -174,10 +174,15 @@ static void dump_profile(struct seq_file *m, struct stats *stats)
 #define dump_profile(m, stats)
 #endif
 
-/* Returns the max receive packet size for the given node */
+/*
+ * Returns the max receive packet size for the given node
+ * Devices which are OHCI v1.0/ v1.1/ v1.2-draft or RFC 2734 compliant
+ * are required by specification to support max_rec of 8 (512 bytes) or more.
+ */
 static inline int device_max_receive(struct fw_device *fw_device)
 {
-	return 1 <<  (clamp_t(int, fw_device->max_rec, 8U, 11U) + 1);
+	/* see IEEE 1394-2008 table 8-8 */
+	return min(2 << fw_device->max_rec, 4096);
 }
 
 static void fwtty_log_tx_error(struct fwtty_port *port, int rcode)
-- 
1.8.1.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/