This is a note to let you know that I've just added the patch titled
ionic: pass opcode to devcmd_wait
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ionic-pass-opcode-to-devcmd_wait.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit cbc226751ac137696e9e7a9e26b1e07d987ba279
Author: Shannon Nelson <shannon.nelson@xxxxxxx>
Date: Mon Dec 11 10:57:57 2023 -0800
ionic: pass opcode to devcmd_wait
[ Upstream commit 24f110240c03c6b5368f1203bac72883d511e606 ]
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.
Signed-off-by: Shannon Nelson <shannon.nelson@xxxxxxx>
Reviewed-by: Brett Creeley <brett.creeley@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 344a3924627d..7adfcd7c2f3a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -293,6 +293,7 @@ void ionic_dev_cmd_comp(struct ionic_dev *idev, union ionic_dev_cmd_comp *comp)
void ionic_dev_cmd_go(struct ionic_dev *idev, union ionic_dev_cmd *cmd)
{
+ idev->opcode = cmd->cmd.opcode;
memcpy_toio(&idev->dev_cmd_regs->cmd, cmd, sizeof(*cmd));
iowrite32(0, &idev->dev_cmd_regs->done);
iowrite32(1, &idev->dev_cmd_regs->doorbell);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 13dfcf9f75da..c10da629ef6e 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -150,6 +150,7 @@ struct ionic_dev {
bool fw_hb_ready;
bool fw_status_ready;
u8 fw_generation;
+ u8 opcode;
u64 __iomem *db_pages;
dma_addr_t phy_db_pages;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index 79272f5f380c..9ecbbe7a02ec 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -465,7 +465,7 @@ static int __ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_seconds,
*/
max_wait = jiffies + (max_seconds * HZ);
try_again:
- opcode = readb(&idev->dev_cmd_regs->cmd.cmd.opcode);
+ opcode = idev->opcode;
start_time = jiffies;
for (fw_up = ionic_is_fw_running(idev);
!done && fw_up && time_before(jiffies, max_wait);
