linux-kernel - [PATCH v4 1/2] crypto: qat - don't release uninitialized resources

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Date:   Thu, 18 Mar 2021 12:21:04 -0400
From:   Tong Zhang <ztong0001@...il.com>
To:     Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Tong Zhang <ztong0001@...il.com>,
        Fiona Trahe <fiona.trahe@...el.com>,
        Tadeusz Struk <tadeusz.struk@...el.com>, qat-linux@...el.com,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wojciech Ziemba <wojciech.ziemba@...el.com>
Subject: [PATCH v4 1/2] crypto: qat - don't release uninitialized resources

adf_vf_isr_resource_alloc() is not unwinding correctly when error
happens and it tris to release uninitialized resources.
To fix this, only release initialized resources.

[    1.792845] Trying to free already-free IRQ 11
[    1.793091] WARNING: CPU: 0 PID: 182 at kernel/irq/manage.c:1821 free_irq+0x202/0x380
[    1.801340] Call Trace:
[    1.801477]  adf_vf_isr_resource_free+0x32/0xb0 [intel_qat]
[    1.801785]  adf_vf_isr_resource_alloc+0x14d/0x150 [intel_qat]
[    1.802105]  adf_dev_init+0xba/0x140 [intel_qat]

Signed-off-by: Tong Zhang <ztong0001@...il.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Fixes: dd0f368398ea ("crypto: qat - Add qat dh895xcc VF driver")
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@...el.com>
---
 drivers/crypto/qat/qat_common/adf_vf_isr.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/adf_vf_isr.c b/drivers/crypto/qat/qat_common/adf_vf_isr.c
index 38d316a42ba6..888388acb6bd 100644
--- a/drivers/crypto/qat/qat_common/adf_vf_isr.c
+++ b/drivers/crypto/qat/qat_common/adf_vf_isr.c
@@ -261,17 +261,26 @@ int adf_vf_isr_resource_alloc(struct adf_accel_dev *accel_dev)
 		goto err_out;
 
 	if (adf_setup_pf2vf_bh(accel_dev))
-		goto err_out;
+		goto err_disable_msi;
 
 	if (adf_setup_bh(accel_dev))
-		goto err_out;
+		goto err_cleanup_pf2vf_bh;
 
 	if (adf_request_msi_irq(accel_dev))
-		goto err_out;
+		goto err_cleanup_bh;
 
 	return 0;
+
+err_cleanup_bh:
+	adf_cleanup_bh(accel_dev);
+
+err_cleanup_pf2vf_bh:
+	adf_cleanup_pf2vf_bh(accel_dev);
+
+err_disable_msi:
+	adf_disable_msi(accel_dev);
+
 err_out:
-	adf_vf_isr_resource_free(accel_dev);
 	return -EFAULT;
 }
 EXPORT_SYMBOL_GPL(adf_vf_isr_resource_alloc);
-- 
2.25.1