[PATCH 5.10 096/130] atlantic: Increase delay for fw transactions

Greg Kroah-Hartman
2021-12-06T15:31:23Z

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(-)

--- 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_)