From: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, rajur@chelsio.com
Subject: [PATCH net 2/3] cxgb4: fix sleep in atomic when flashing PHY firmware
Date: Fri, 11 Jun 2021 12:17:46 +0530 [thread overview]
Message-ID: <ef7ce471759b21428ba258a0355615b73646d073.1623400558.git.rahul.lakkireddy@chelsio.com> (raw)
In-Reply-To: <cover.1623400558.git.rahul.lakkireddy@chelsio.com>
In-Reply-To: <cover.1623400558.git.rahul.lakkireddy@chelsio.com>
Before writing new PHY firmware to on-chip memory, driver queries
firmware for current running PHY firmware version, which can result
in sleep waiting for reply. So, move spinlock closer to the actual
on-chip memory write operation, instead of taking it at the callers.
Fixes: 5fff701c838e ("cxgb4: always sync access when flashing PHY firmware")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c | 2 --
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 2 --
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c | 2 ++
3 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
index 61ea3ec5c3fc..bc2de01d0539 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c
@@ -1337,9 +1337,7 @@ static int cxgb4_ethtool_flash_phy(struct net_device *netdev,
return ret;
}
- spin_lock_bh(&adap->win0_lock);
ret = t4_load_phy_fw(adap, MEMWIN_NIC, NULL, data, size);
- spin_unlock_bh(&adap->win0_lock);
if (ret)
dev_err(adap->pdev_dev, "Failed to load PHY FW\n");
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 1f601de02e70..762113a04dde 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -4424,10 +4424,8 @@ static int adap_init0_phy(struct adapter *adap)
/* Load PHY Firmware onto adapter.
*/
- spin_lock_bh(&adap->win0_lock);
ret = t4_load_phy_fw(adap, MEMWIN_NIC, phy_info->phy_fw_version,
(u8 *)phyf->data, phyf->size);
- spin_unlock_bh(&adap->win0_lock);
if (ret < 0)
dev_err(adap->pdev_dev, "PHY Firmware transfer error %d\n",
-ret);
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 1293505025c1..a0555f4d76fc 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -3820,9 +3820,11 @@ int t4_load_phy_fw(struct adapter *adap, int win,
/* Copy the supplied PHY Firmware image to the adapter memory location
* allocated by the adapter firmware.
*/
+ spin_lock_bh(&adap->win0_lock);
ret = t4_memory_rw(adap, win, mtype, maddr,
phy_fw_size, (__be32 *)phy_fw_data,
T4_MEMORY_WRITE);
+ spin_unlock_bh(&adap->win0_lock);
if (ret)
return ret;
--
2.27.0
next prev parent reply other threads:[~2021-06-11 8:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-11 6:47 [PATCH net 0/3] cxgb4: bug fixes for ethtool flash ops Rahul Lakkireddy
2021-06-11 6:47 ` [PATCH net 1/3] cxgb4: fix endianness when flashing boot image Rahul Lakkireddy
2021-06-11 6:47 ` Rahul Lakkireddy [this message]
2021-06-11 6:47 ` [PATCH net 3/3] cxgb4: halt chip before flashing PHY firmware image Rahul Lakkireddy
2021-06-11 18:20 ` [PATCH net 0/3] cxgb4: bug fixes for ethtool flash ops patchwork-bot+netdevbpf
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