firewire: core: fix multichannel IR with buffers larger than 2 GB

With a 32-bit i, computing i<<PAGE_SHIFT might result in
an overflow and in an eventual sign-extension.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 8382e27e9a27..38c0aa60b2cb 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -146,7 +146,7 @@ EXPORT_SYMBOL(fw_iso_buffer_destroy);
 /* Convert DMA address to offset into virtually contiguous buffer. */
 size_t fw_iso_buffer_lookup(struct fw_iso_buffer *buffer, dma_addr_t completed)
 {
-        int i;
+        size_t i;
         dma_addr_t address;
         ssize_t offset;