drivers: mtd: nand: cadence: Poll for desc complete status
Poll for thread complete status to ensure the
descriptor processing is complete. If complete then can ensure
controller already update the descriptor status.
Signed-off-by: Dinesh Maniyam <dinesh.maniyam@intel.com>
diff --git a/drivers/mtd/nand/raw/cadence_nand.c b/drivers/mtd/nand/raw/cadence_nand.c
index a717987..e571e5a 100644
--- a/drivers/mtd/nand/raw/cadence_nand.c
+++ b/drivers/mtd/nand/raw/cadence_nand.c
@@ -520,6 +520,7 @@
{
struct cadence_nand_irq_status irq_mask, irq_status = {0};
int status;
+ u32 val;
irq_mask.trd_status = BIT(thread);
irq_mask.trd_error = BIT(thread);
@@ -531,6 +532,14 @@
if (status)
return status;
+ /* Make sure the descriptor processing is complete */
+ status = readl_poll_timeout(cadence->reg + TRD_COMP_INT_STATUS, val,
+ (val & BIT(thread)), TIMEOUT_US);
+ if (status) {
+ pr_err("cmd thread completion timeout!\n");
+ return status;
+ }
+
cadence_nand_wait_for_irq(cadence, &irq_mask, &irq_status);
if (irq_status.status == 0 && irq_status.trd_status == 0 &&