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firewire: fw-ohci: untangle a mixed unsigned/signed expression

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and make another expression more readable.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-03-11 21:22:26 +01:00
parent ad3c0fe8b8
commit 43286568ad
1 changed files with 5 additions and 3 deletions
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8
drivers/firewire/fw-ohci.c
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@ -494,6 +494,7 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
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 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
/* 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 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
* 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);