diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c
index 86987252862f..552e202e7226 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etr.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c
@@ -1129,9 +1129,11 @@ tmc_etr_setup_sysfs_buf(struct tmc_drvdata *drvdata)
 			&& drvdata->byte_cntr->sw_usb)
 			new_buf = tmc_alloc_etr_buf(drvdata, TMC_ETR_SW_USB_BUF_SIZE,
 					 0, cpu_to_node(0), NULL);
-		else if (drvdata->out_mode == TMC_ETR_OUT_MODE_PCIE)
+		else if (drvdata->out_mode == TMC_ETR_OUT_MODE_PCIE) {
 			new_buf = tmc_alloc_etr_buf(drvdata, TMC_ETR_PCIE_MEM_SIZE,
 					 0, cpu_to_node(0), NULL);
+			drvdata->size = TMC_ETR_PCIE_MEM_SIZE;
+		}
 		else
 			new_buf = tmc_alloc_etr_buf(drvdata, drvdata->size,
 					 0, cpu_to_node(0), NULL);
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 0c70b54863bb..e911342ddf31 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -104,7 +104,7 @@
 #define TMC_ETR_BAM_PIPE_INDEX	0
 #define TMC_ETR_BAM_NR_PIPES	2
 
-#define TMC_ETR_PCIE_MEM_SIZE	0x400000
+#define TMC_ETR_PCIE_MEM_SIZE	0x2000000
 
 #define TMC_AUTH_NSID_MASK	GENMASK(1, 0)