diff mbox series

[5.15,145/207] atlantic: Increase delay for fw transactions

Message ID 20211206145615.256810685@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Dec. 6, 2021, 2:56 p.m. UTC 
From: Dmitry Bogdanov <dbezrukov@marvell.com>

commit aa1dcb5646fdf34a15763facf4bf5e482a2814ca upstream.

The max waiting period (of 1 ms) while reading the data from FW shared
buffer is too small for certain types of data (e.g., stats). There's a
chance that FW could be updating buffer at the same time and driver
would be unsuccessful in reading data. Firmware manual recommends to
have 1 sec timeout to fix this issue.

Fixes: 5cfd54d7dc186 ("net: atlantic: minimal A2 fw_ops")
Signed-off-by: Dmitry Bogdanov <dbezrukov@marvell.com>
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c
@@ -84,7 +84,7 @@  static int hw_atl2_shared_buffer_read_bl
 			if (cnt > AQ_A2_FW_READ_TRY_MAX)
 				return -ETIME;
 			if (tid1.transaction_cnt_a != tid1.transaction_cnt_b)
-				udelay(1);
+				mdelay(1);
 		} while (tid1.transaction_cnt_a != tid1.transaction_cnt_b);
 
 		hw_atl2_mif_shared_buf_read(self, offset, (u32 *)data, dwords);
@@ -339,8 +339,11 @@  static int aq_a2_fw_update_stats(struct
 {
 	struct hw_atl2_priv *priv = (struct hw_atl2_priv *)self->priv;
 	struct statistics_s stats;
+	int err;
 
-	hw_atl2_shared_buffer_read_safe(self, stats, &stats);
+	err = hw_atl2_shared_buffer_read_safe(self, stats, &stats);
+	if (err)
+		return err;
 
 #define AQ_SDELTA(_N_, _F_) (self->curr_stats._N_ += \
 			stats.msm._F_ - priv->last_stats.msm._F_)