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From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
	Hans de Goede <hdegoede@redhat.com>,
	linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Wolfram Sang <wsa@the-dreams.de>,
	linux-kernel@vger.kernel.org
Subject: [RFC/RFT 02/10] i2c: reject new transfers when adapters are suspended
Date: Mon, 10 Dec 2018 22:03:00 +0100	[thread overview]
Message-ID: <20181210210310.12677-3-wsa+renesas@sang-engineering.com> (raw)
Message-ID: <20181210210300.pxzHgbZ1GM7SG8FaDmVM-WUrdq7PgLbFcMGSXGVK3GI@z> (raw)
In-Reply-To: <20181210210310.12677-1-wsa+renesas@sang-engineering.com>

Using the new 'is_suspended' flag, we now reject new transfers if the
adapter is already marked suspended.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/i2c/i2c-core-base.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 9f89e258c8ff..5b2078a902f8 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1866,6 +1866,8 @@ int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
 
 	if (WARN_ON(!msgs || num < 1))
 		return -EINVAL;
+	if (WARN_ON(adap->is_suspended))
+		return -ESHUTDOWN;
 
 	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))
 		return -EOPNOTSUPP;
-- 
2.11.0


  parent reply	other threads:[~2018-12-10 21:04 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-10 21:02 [RFC/RFT 00/10] i2c: move handling of suspended adapters to the core Wolfram Sang
2018-12-10 21:02 ` Wolfram Sang
2018-12-10 21:02 ` [RFC/RFT 01/10] i2c: add 'is_suspended' flag for i2c adapters Wolfram Sang
2018-12-10 21:02   ` Wolfram Sang
2018-12-10 22:03   ` Peter Rosin
2018-12-10 22:03     ` Peter Rosin
2018-12-18 23:33     ` Wolfram Sang
2018-12-19  9:39       ` Geert Uytterhoeven
2018-12-19 16:31         ` Wolfram Sang
2018-12-10 21:03 ` Wolfram Sang [this message]
2018-12-10 21:03   ` [RFC/RFT 02/10] i2c: reject new transfers when adapters are suspended Wolfram Sang
2018-12-10 21:03 ` [RFC/RFT 03/10] i2c: synquacer: remove unused is_suspended flag Wolfram Sang
2018-12-10 21:03   ` Wolfram Sang
2018-12-10 21:04   ` Ard Biesheuvel
2018-12-10 21:03 ` [RFC/RFT 04/10] i2c: brcmstb: use core helper to mark adapter suspended Wolfram Sang
2018-12-10 21:03   ` Wolfram Sang
2018-12-11 16:44   ` Kamal Dasu
2018-12-10 21:03 ` [RFC/RFT 05/10] i2c: zx2967: " Wolfram Sang
2018-12-11  2:12   ` Shawn Guo
2018-12-11  2:12     ` Shawn Guo
2018-12-10 21:03 ` [RFC/RFT 06/10] i2c: sprd: don't use pdev as variable name for struct device * Wolfram Sang
2018-12-10 21:03 ` [RFC/RFT 07/10] i2c: sprd: use core helper to mark adapter suspended Wolfram Sang
2018-12-10 21:03 ` [RFC/RFT 08/10] i2c: exynos5: " Wolfram Sang
2018-12-18 11:23   ` Marek Szyprowski
2018-12-18 19:52     ` Wolfram Sang
2018-12-10 21:03 ` [RFC/RFT 09/10] i2c: s3c2410: " Wolfram Sang
2018-12-10 21:03   ` Wolfram Sang
2018-12-18 11:24   ` Marek Szyprowski
2018-12-10 21:03 ` [RFC/RFT 10/10] i2c: rcar: add suspend/resume support Wolfram Sang
2018-12-10 21:03   ` Wolfram Sang
2018-12-10 21:52   ` Peter Rosin
2018-12-10 21:52     ` Peter Rosin
2018-12-18 23:47     ` Wolfram Sang
2018-12-11 19:24 ` [RFC/RFT 00/10] i2c: move handling of suspended adapters to the core Hans de Goede
2018-12-11 23:41   ` Wolfram Sang
2018-12-12 10:09     ` Hans de Goede
2018-12-18 20:17       ` Wolfram Sang
2018-12-18 21:44         ` Hans de Goede
2018-12-18 23:32           ` Wolfram Sang

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