linux-kernel - [PATCH 4.14 38/42] net/qla3xxx: fix schedule while atomic in ql_wait_for_drvr_lock and ql_adapter

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Message-Id: <20210813150526.370879471@linuxfoundation.org>
Date:   Fri, 13 Aug 2021 17:07:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Letu Ren <fantasquex@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.14 38/42] net/qla3xxx: fix schedule while atomic in ql_wait_for_drvr_lock and ql_adapter_reset

From: Letu Ren <fantasquex@...il.com>

[ Upstream commit 92766c4628ea349c8ddab0cd7bd0488f36e5c4ce ]

When calling the 'ql_wait_for_drvr_lock' and 'ql_adapter_reset', the driver
has already acquired the spin lock, so the driver should not call 'ssleep'
in atomic context.

This bug can be fixed by using 'mdelay' instead of 'ssleep'.

Reported-by: Letu Ren <fantasquex@...il.com>
Signed-off-by: Letu Ren <fantasquex@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/qlogic/qla3xxx.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -155,7 +155,7 @@ static int ql_wait_for_drvr_lock(struct
 				      "driver lock acquired\n");
 			return 1;
 		}
-		ssleep(1);
+		mdelay(1000);
 	} while (++i < 10);
 
 	netdev_err(qdev->ndev, "Timed out waiting for driver lock...\n");
@@ -3291,7 +3291,7 @@ static int ql_adapter_reset(struct ql3_a
 		if ((value & ISP_CONTROL_SR) == 0)
 			break;
 
-		ssleep(1);
+		mdelay(1000);
 	} while ((--max_wait_time));
 
 	/*
@@ -3327,7 +3327,7 @@ static int ql_adapter_reset(struct ql3_a
 						   ispControlStatus);
 			if ((value & ISP_CONTROL_FSR) == 0)
 				break;
-			ssleep(1);
+			mdelay(1000);
 		} while ((--max_wait_time));
 	}
 	if (max_wait_time == 0)