diff options
Diffstat (limited to 'drivers/firewire/ohci.c')
| -rw-r--r-- | drivers/firewire/ohci.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c index 0cf4d7f562c5..94b16e0340ae 100644 --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -1158,7 +1158,7 @@ static void handle_local_lock(struct fw_ohci *ohci, struct fw_packet *packet, u32 csr) { struct fw_packet response; - int tcode, length, ext_tcode, sel; + int tcode, length, ext_tcode, sel, try; __be32 *payload, lock_old; u32 lock_arg, lock_data; @@ -1185,21 +1185,26 @@ static void handle_local_lock(struct fw_ohci *ohci, reg_write(ohci, OHCI1394_CSRCompareData, lock_arg); reg_write(ohci, OHCI1394_CSRControl, sel); - if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) - lock_old = cpu_to_be32(reg_read(ohci, OHCI1394_CSRData)); - else - fw_notify("swap not done yet\n"); + for (try = 0; try < 20; try++) + if (reg_read(ohci, OHCI1394_CSRControl) & 0x80000000) { + lock_old = cpu_to_be32(reg_read(ohci, + OHCI1394_CSRData)); + fw_fill_response(&response, packet->header, + RCODE_COMPLETE, + &lock_old, sizeof(lock_old)); + goto out; + } + + fw_error("swap not done (CSR lock timeout)\n"); + fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0); - fw_fill_response(&response, packet->header, - RCODE_COMPLETE, &lock_old, sizeof(lock_old)); out: fw_core_handle_response(&ohci->card, &response); } static void handle_local_request(struct context *ctx, struct fw_packet *packet) { - u64 offset; - u32 csr; + u64 offset, csr; if (ctx == &ctx->ohci->at_request_ctx) { packet->ack = ACK_PENDING; |
