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From: Stephen Boyd <swboyd@chromium.org>
To: Mika Westerberg <mika.westerberg@linux.intel.com>,
	Hans de Goede <hdegoede@redhat.com>,
	Mark Gross <markgross@kernel.org>
Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev,
	platform-driver-x86@vger.kernel.org,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Kuppuswamy Sathyanarayanan
	<sathyanarayanan.kuppuswamy@linux.intel.com>,
	Prashant Malani <pmalani@chromium.org>
Subject: [PATCH v4 3/4] platform/x86: intel_scu_ipc: Don't override scu in intel_scu_ipc_dev_simple_command()
Date: Wed, 13 Sep 2023 14:27:21 -0700	[thread overview]
Message-ID: <20230913212723.3055315-4-swboyd@chromium.org> (raw)
In-Reply-To: <20230913212723.3055315-1-swboyd@chromium.org>

Andy discovered this bug during patch review. The 'scu' argument to this
function shouldn't be overridden by the function itself. It doesn't make
any sense. Looking at the commit history, we see that commit
f57fa18583f5 ("platform/x86: intel_scu_ipc: Introduce new SCU IPC API")
removed the setting of the scu to ipcdev in other functions, but not
this one. That was an oversight. Remove this line so that we stop
overriding the scu instance that is used by this function.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Closes: https://lore.kernel.org/r/ZPjdZ3xNmBEBvNiS@smile.fi.intel.com
Cc: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Fixes: f57fa18583f5 ("platform/x86: intel_scu_ipc: Introduce new SCU IPC API")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
---
 drivers/platform/x86/intel_scu_ipc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index 299c15312acb..3271f81a9c00 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -443,7 +443,6 @@ int intel_scu_ipc_dev_simple_command(struct intel_scu_ipc_dev *scu, int cmd,
 		mutex_unlock(&ipclock);
 		return -ENODEV;
 	}
-	scu = ipcdev;
 	cmdval = sub << 12 | cmd;
 	ipc_command(scu, cmdval);
 	err = intel_scu_ipc_check_status(scu);
-- 
https://chromeos.dev


  parent reply	other threads:[~2023-09-13 21:27 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-13 21:27 [PATCH v4 0/4] platform/x86: intel_scu_ipc: Timeout fixes Stephen Boyd
2023-09-13 21:27 ` [PATCH v4 1/4] platform/x86: intel_scu_ipc: Check status after timeout in busy_loop() Stephen Boyd
2023-09-15 13:42   ` Ilpo Järvinen
2023-09-13 21:27 ` [PATCH v4 2/4] platform/x86: intel_scu_ipc: Check status upon timeout in ipc_wait_for_interrupt() Stephen Boyd
2023-09-15 13:49   ` Ilpo Järvinen
2023-09-18 13:10     ` Hans de Goede
2023-09-18 13:26       ` Ilpo Järvinen
2023-09-13 21:27 ` Stephen Boyd [this message]
2023-09-15 14:45   ` [PATCH v4 3/4] platform/x86: intel_scu_ipc: Don't override scu in intel_scu_ipc_dev_simple_command() Ilpo Järvinen
2023-09-16 11:14     ` Andy Shevchenko
2023-09-13 21:27 ` [PATCH v4 4/4] platform/x86: intel_scu_ipc: Fail IPC send if still busy Stephen Boyd
2023-09-15 14:49   ` Ilpo Järvinen
2023-09-18 13:15 ` [PATCH v4 0/4] platform/x86: intel_scu_ipc: Timeout fixes Hans de Goede

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