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  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]
Date:	Mon, 21 Jul 2014 14:05:12 +0800
From:	Lv Zheng <lv.zheng@...el.com>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>
Cc:	Lv Zheng <lv.zheng@...el.com>, Lv Zheng <zetalog@...il.com>,
	<linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org
Subject: [RFC PATCH v3 02/14] ACPI/EC: Add detailed command/query debugging information.

Developers really don't need to translate EC commands in mind. This patch
adds detailed debugging information for the EC commands.
The address can be found in the follow-up sequential EC_DATA(W) accesses,
thus this patch also removes some of the redundant address information.

Signed-off-by: Lv Zheng <lv.zheng@...el.com>
---
 drivers/acpi/ec.c |   29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 28ce2cd..54bebbb 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -175,6 +175,27 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
 	outb(data, ec->data_addr);
 }
 
+#ifdef DEBUG
+static const char *acpi_ec_cmd_string(u8 cmd)
+{
+	switch (cmd) {
+	case 0x80:
+		return "RD_EC";
+	case 0x81:
+		return "WR_EC";
+	case 0x82:
+		return "BE_EC";
+	case 0x83:
+		return "BD_EC";
+	case 0x84:
+		return "QR_EC";
+	}
+	return "UNKNOWN";
+}
+#else
+#define acpi_ec_cmd_string(cmd)		"UNDEF"
+#endif
+
 static int ec_transaction_completed(struct acpi_ec *ec)
 {
 	unsigned long flags;
@@ -302,16 +323,16 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
 	}
 	/* following two actions should be kept atomic */
 	ec->curr = t;
-	pr_debug("***** transaction started (cmd=0x%02x, addr=0x%02x) *****\n",
-		 t->command, t->wdata ? t->wdata[0] : 0);
+	pr_debug("***** Command(%s) started *****\n",
+		 acpi_ec_cmd_string(t->command));
 	start_transaction(ec);
 	if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
 		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
 	spin_unlock_irqrestore(&ec->lock, tmp);
 	ret = ec_poll(ec);
 	spin_lock_irqsave(&ec->lock, tmp);
-	pr_debug("***** transaction stopped (cmd=0x%02x, addr=0x%02x) *****\n",
-		 t->command, t->wdata ? t->wdata[0] : 0);
+	pr_debug("***** Command(%s) stopped *****\n",
+		 acpi_ec_cmd_string(t->command));
 	ec->curr = NULL;
 unlock:
 	spin_unlock_irqrestore(&ec->lock, tmp);
-- 
1.7.10

--
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/

Powered by blists - more mailing lists