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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-09-06 20:51:27 +0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2009-09-12 16:48:40 +0400
commit094614fc14966bc6a6259ade55f051fe17f36122 (patch)
tree36ccc96edeb9dff1f947de727599b3d33a2efdd4 /drivers/firewire/sbp2.c
parent85cb9b68640cf467a99d4b6d518f1293222dbc9e (diff)
downloadlinux-094614fc14966bc6a6259ade55f051fe17f36122.tar.xz
firewire: sbp2: fix status reception
Per SBP-2 clause 5.3, a target shall store 8...32 bytes of status information. Trailing zeros after the first 8 bytes don't need to be stored, they are implicit. Fix the status write handler to clear all unwritten status data. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/sbp2.c')
-rw-r--r--drivers/firewire/sbp2.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index e5df822a8130..8f83bffb43e7 100644
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -425,19 +425,20 @@ static void sbp2_status_write(struct fw_card *card, struct fw_request *request,
struct sbp2_logical_unit *lu = callback_data;
struct sbp2_orb *orb;
struct sbp2_status status;
- size_t header_size;
unsigned long flags;
if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
- length == 0 || length > sizeof(status)) {
+ length < 8 || length > sizeof(status)) {
fw_send_response(card, request, RCODE_TYPE_ERROR);
return;
}
- header_size = min(length, 2 * sizeof(u32));
- fw_memcpy_from_be32(&status, payload, header_size);
- if (length > header_size)
- memcpy(status.data, payload + 8, length - header_size);
+ status.status = be32_to_cpup(payload);
+ status.orb_low = be32_to_cpup(payload + 4);
+ memset(status.data, 0, sizeof(status.data));
+ if (length > 8)
+ memcpy(status.data, payload + 8, length - 8);
+
if (STATUS_GET_SOURCE(status) == 2 || STATUS_GET_SOURCE(status) == 3) {
fw_notify("non-orb related status write, not handled\n");
fw_send_response(card, request, RCODE_COMPLETE);