[PATCH net 5/5] pds_core: pass opcode to devcmd_wait

[Shannon Nelson <shannon.nelson@amd.com>]

Don't rely on the PCI memory for the devcmd opcode because we
read a 0xff value if the PCI bus is broken, which can cause us
to report a bogus dev_cmd opcode later.

Fixes: 523847df1b37 ("pds_core: add devcmd device interfaces")
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Brett Creeley <brett.creeley@amd.com>
---
 drivers/net/ethernet/amd/pds_core/dev.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/amd/pds_core/dev.c b/drivers/net/ethernet/amd/pds_core/dev.c
index 524f422ee7ac..f77cd9f5a2fd 100644
--- a/drivers/net/ethernet/amd/pds_core/dev.c
+++ b/drivers/net/ethernet/amd/pds_core/dev.c
@@ -121,7 +121,7 @@ static const char *pdsc_devcmd_str(int opcode)
 	}
 }
 
-static int pdsc_devcmd_wait(struct pdsc *pdsc, int max_seconds)
+static int pdsc_devcmd_wait(struct pdsc *pdsc, u8 opcode, int max_seconds)
 {
 	struct device *dev = pdsc->dev;
 	unsigned long start_time;
@@ -131,9 +131,6 @@ static int pdsc_devcmd_wait(struct pdsc *pdsc, int max_seconds)
 	int done = 0;
 	int err = 0;
 	int status;
-	int opcode;
-
-	opcode = ioread8(&pdsc->cmd_regs->cmd.opcode);
 
 	start_time = jiffies;
 	max_wait = start_time + (max_seconds * HZ);
@@ -180,7 +177,7 @@ int pdsc_devcmd_locked(struct pdsc *pdsc, union pds_core_dev_cmd *cmd,
 
 	memcpy_toio(&pdsc->cmd_regs->cmd, cmd, sizeof(*cmd));
 	pdsc_devcmd_dbell(pdsc);
-	err = pdsc_devcmd_wait(pdsc, max_seconds);
+	err = pdsc_devcmd_wait(pdsc, cmd->opcode, max_seconds);
 	memcpy_fromio(comp, &pdsc->cmd_regs->comp, sizeof(*comp));
 
 	if ((err == -ENXIO || err == -ETIMEDOUT) && pdsc->wq)
-- 
2.17.1