Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
  firewire: ohci: wait for local CSR lock access to finish
  firewire: ohci: prevent aliasing of locally handled register addresses
  firewire: core: fw_iso_resource_manage: return -EBUSY when out of resources
  firewire: core: fix retries calculation in iso manage_channel()
  firewire: cdev: fix cut+paste mistake in disclaimer

2 files changed, 24 insertions, 13 deletions

diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 3784a47865b7..8f5aebfb29df 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -190,7 +190,7 @@ static int manage_bandwidth(struct fw_card *card, int irm_id, int generation,
         for (try = 0; try < 5; try++) {
                 new = allocate ? old - bandwidth : old + bandwidth;
                 if (new < 0 || new > BANDWIDTH_AVAILABLE_INITIAL)
-                        break;
+                        return -EBUSY;
 
                 data[0] = cpu_to_be32(old);
                 data[1] = cpu_to_be32(new);
@@ -218,7 +218,7 @@ static int manage_channel(struct fw_card *card, int irm_id, int generation,
                 u32 channels_mask, u64 offset, bool allocate, __be32 data[2])
 {
         __be32 c, all, old;
-        int i, retry = 5;
+        int i, ret = -EIO, retry = 5;
 
         old = all = allocate ? cpu_to_be32(~0) : 0;
 
@@ -226,6 +226,8 @@ static int manage_channel(struct fw_card *card, int irm_id, int generation,
                 if (!(channels_mask & 1 << i))
                         continue;
 
+                ret = -EBUSY;
+
                 c = cpu_to_be32(1 << (31 - i));
                 if ((old & c) != (all & c))
                         continue;
@@ -251,12 +253,16 @@ static int manage_channel(struct fw_card *card, int irm_id, int generation,
 
                         /* 1394-1995 IRM, fall through to retry. */
                 default:
-                        if (retry--)
+                        if (retry) {
+                                retry--;
                                 i--;
+                        } else {
+                                ret = -EIO;
+                        }
                 }
         }
 
-        return -EIO;
+        return ret;
 }
 
 static void deallocate_channel(struct fw_card *card, int irm_id,
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;