firewire: fw-ohci: untangle a mixed unsigned/signed expression
and make another expression more readable.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index b564b1a..533788f 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -494,6 +494,7 @@
struct fw_ohci *ohci = ctx->ohci;
struct fw_packet p;
u32 status, length, tcode;
+ int evt;
p.header[0] = cond_le32_to_cpu(buffer[0]);
p.header[1] = cond_le32_to_cpu(buffer[1]);
@@ -536,13 +537,14 @@
/* FIXME: What to do about evt_* errors? */
length = (p.header_length + p.payload_length + 3) / 4;
status = cond_le32_to_cpu(buffer[length]);
+ evt = (status >> 16) & 0x1f;
- p.ack = ((status >> 16) & 0x1f) - 16;
+ p.ack = evt - 16;
p.speed = (status >> 21) & 0x7;
p.timestamp = status & 0xffff;
p.generation = ohci->request_generation;
- log_ar_at_event('R', p.speed, p.header, status >> 16 & 0x1f);
+ log_ar_at_event('R', p.speed, p.header, evt);
/*
* The OHCI bus reset handler synthesizes a phy packet with
@@ -554,7 +556,7 @@
* request.
*/
- if (p.ack + 16 == 0x09)
+ if (evt == OHCI1394_evt_bus_reset)
ohci->request_generation = (p.header[2] >> 16) & 0xff;
else if (ctx == &ohci->ar_request_ctx)
fw_core_handle_request(&ohci->card, &p);
