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firewire: core: fix multichannel IR with buffers larger than 2 GB
author
Clemens Ladisch
<clemens@ladisch.de>
Wed, 13 Jun 2012 20:28:24 +0000
(22:28 +0200)
committer
Stefan Richter
<stefanr@s5r6.in-berlin.de>
Sun, 17 Jun 2012 17:35:26 +0000
(19:35 +0200)
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>
drivers/firewire/core-iso.c
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diff --git
a/drivers/firewire/core-iso.c
b/drivers/firewire/core-iso.c
index 8382e27e9a271877c98d24ff6268f9d578738b47..38c0aa60b2cb1a53da46547e5bc188a87db1f18b 100644
(file)
--- 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)
{
-
in
t i;
+
size_
t i;
dma_addr_t address;
ssize_t offset;