Commit c48c0fd0e196 for kernel

commit c48c0fd0e19684b6ecdb4108a429e3a4e73f5e21
Author: Thomas Fourier <fourier.thomas@gmail.com>
Date:   Tue Dec 16 17:54:18 2025 +0100

    firewire: nosy: Fix dma_free_coherent() size

    It looks like the buffer allocated and mapped in add_card() is done
    with size RCV_BUFFER_SIZE which is 16 KB and 4KB.

    Fixes: 286468210d83 ("firewire: new driver: nosy - IEEE 1394 traffic sniffer")
    Co-developed-by: Thomas Fourier <fourier.thomas@gmail.com>
    Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
    Co-developed-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
    Link: https://lore.kernel.org/r/20251216165420.38355-2-fourier.thomas@gmail.com
    Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

diff --git a/drivers/firewire/nosy.c b/drivers/firewire/nosy.c
index ea31ac7ac1ca..e59053738a43 100644
--- a/drivers/firewire/nosy.c
+++ b/drivers/firewire/nosy.c
@@ -36,6 +36,8 @@

 static char driver_name[] = KBUILD_MODNAME;

+#define RCV_BUFFER_SIZE (16 * 1024)
+
 /* this is the physical layout of a PCL, its size is 128 bytes */
 struct pcl {
 	__le32 next;
@@ -517,16 +519,14 @@ remove_card(struct pci_dev *dev)
 			  lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
 	dma_free_coherent(&lynx->pci_device->dev, sizeof(struct pcl),
 			  lynx->rcv_pcl, lynx->rcv_pcl_bus);
-	dma_free_coherent(&lynx->pci_device->dev, PAGE_SIZE, lynx->rcv_buffer,
-			  lynx->rcv_buffer_bus);
+	dma_free_coherent(&lynx->pci_device->dev, RCV_BUFFER_SIZE,
+			  lynx->rcv_buffer, lynx->rcv_buffer_bus);

 	iounmap(lynx->registers);
 	pci_disable_device(dev);
 	lynx_put(lynx);
 }

-#define RCV_BUFFER_SIZE (16 * 1024)
-
 static int
 add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 {
@@ -680,7 +680,7 @@ add_card(struct pci_dev *dev, const struct pci_device_id *unused)
 		dma_free_coherent(&lynx->pci_device->dev, sizeof(struct pcl),
 				  lynx->rcv_pcl, lynx->rcv_pcl_bus);
 	if (lynx->rcv_buffer)
-		dma_free_coherent(&lynx->pci_device->dev, PAGE_SIZE,
+		dma_free_coherent(&lynx->pci_device->dev, RCV_BUFFER_SIZE,
 				  lynx->rcv_buffer, lynx->rcv_buffer_bus);
 	iounmap(lynx->registers);