lkml.org 
[lkml]   [2021]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/5] PCI/switchtec: Fix a MRPC error status handling issue
Date
From: Kelvin Cao <kelvin.cao@microchip.com>

If an error is encountered when executing a MRPC command, the firmware
will set the status register to SWITCHTEC_MRPC_STATUS_ERROR and return
the error code in the return value register.

Add handling of SWITCHTEC_MRPC_STATUS_ERROR on status register when
completing a MRPC command.

Signed-off-by: Kelvin Cao <kelvin.cao@microchip.com>
---
drivers/pci/switch/switchtec.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index e5bb2ac0e7bb..5c300ff3921d 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -238,7 +238,8 @@ static void mrpc_complete_cmd(struct switchtec_dev *stdev)
stuser_set_state(stuser, MRPC_DONE);
stuser->return_code = 0;

- if (stuser->status != SWITCHTEC_MRPC_STATUS_DONE)
+ if (stuser->status != SWITCHTEC_MRPC_STATUS_DONE &&
+ stuser->status != SWITCHTEC_MRPC_STATUS_ERROR)
goto out;

if (stdev->dma_mrpc)
@@ -622,7 +623,8 @@ static ssize_t switchtec_dev_read(struct file *filp, char __user *data,
out:
mutex_unlock(&stdev->mrpc_mutex);

- if (stuser->status == SWITCHTEC_MRPC_STATUS_DONE)
+ if (stuser->status == SWITCHTEC_MRPC_STATUS_DONE ||
+ stuser->status == SWITCHTEC_MRPC_STATUS_ERROR)
return size;
else if (stuser->status == SWITCHTEC_MRPC_STATUS_INTERRUPTED)
return -ENXIO;
--
2.25.1
\
 
 \ /
  Last update: 2021-10-14 09:27    [W:0.078 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site