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IEEE 1394 (FireWire) subsystem updates post v3.4:

Browse source 
- Fix mismatch between DMA mapping direction (was wrong) and DMA synchronization
     direction (was correct) of isochronous reception buffers of userspace drivers
     if vma-mapped for R/W access.  For example, libdc1394 was affected.
 
   - more consistent retry stategy in device discovery/ rediscovery, and improved
     failure diagnostics
 
   - various small cleanups, e.g. use SCSI layer's DMA mapping API in firewire-sbp2
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Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull IEEE 1394 (FireWire) subsystem updates from Stefan Richter:

 - Fix mismatch between DMA mapping direction (was wrong) and DMA
   synchronization direction (was correct) of isochronous reception
   buffers of userspace drivers if vma-mapped for R/W access.  For
   example, libdc1394 was affected.

 - more consistent retry stategy in device discovery/ rediscovery, and
   improved failure diagnostics

 - various small cleanups, e.g. use SCSI layer's DMA mapping API in
   firewire-sbp2

* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: sbp2: document the absence of alignment requirements
  firewire: sbp2: remove superfluous blk_queue_max_segment_size() call
  firewire: sbp2: use scsi_dma_(un)map
  firewire: sbp2: give correct DMA device to scsi framework
  firewire: core: fw_device_refresh(): clean up error handling
  firewire: core: log config rom reading errors
  firewire: core: log error in case of failed bus manager lock
  firewire: move rcode_string() to core
  firewire: core: improve reread_config_rom() interface
  firewire: core: wait for inaccessible devices after bus reset
  firewire: ohci: omit spinlock IRQ flags where possible
  firewire: ohci: correct signedness of a local variable
  firewire: core: fix DMA mapping direction
  firewire: use module_pci_driver
This commit is contained in:
Linus Torvalds 2012-05-24 12:57:47 -07:00
commit 2f78d8e249
13 changed files with 218 additions and 189 deletions
Download patch file Download diff file Expand all files Collapse all files

2
sound/firewire/cmp.c
View file

@ -84,7 +84,7 @@ static int pcr_modify(struct cmp_connection *c,
return 0;
io_error:
cmp_error(c, "transaction failed: %s\n", rcode_string(rcode));
cmp_error(c, "transaction failed: %s\n", fw_rcode_string(rcode));
return -EIO;
bus_reset:

28
sound/firewire/lib.c
View file

@ -13,32 +13,6 @@
#define ERROR_RETRY_DELAY_MS 5
/**
* rcode_string - convert a firewire result code to a string
* @rcode: the result
*/
const char *rcode_string(unsigned int rcode)
{
static const char *const names[] = {
[RCODE_COMPLETE] = "complete",
[RCODE_CONFLICT_ERROR] = "conflict error",
[RCODE_DATA_ERROR] = "data error",
[RCODE_TYPE_ERROR] = "type error",
[RCODE_ADDRESS_ERROR] = "address error",
[RCODE_SEND_ERROR] = "send error",
[RCODE_CANCELLED] = "cancelled",
[RCODE_BUSY] = "busy",
[RCODE_GENERATION] = "generation",
[RCODE_NO_ACK] = "no ack",
};
if (rcode < ARRAY_SIZE(names) && names[rcode])
return names[rcode];
else
return "unknown";
}
EXPORT_SYMBOL(rcode_string);
/**
* snd_fw_transaction - send a request and wait for its completion
* @unit: the driver's unit on the target device
@ -71,7 +45,7 @@ int snd_fw_transaction(struct fw_unit *unit, int tcode,
if (rcode_is_permanent_error(rcode) || ++tries >= 3) {
dev_err(&unit->device, "transaction failed: %s\n",
rcode_string(rcode));
fw_rcode_string(rcode));
return -EIO;
}

1
sound/firewire/lib.h
View file

@ -8,7 +8,6 @@ struct fw_unit;
int snd_fw_transaction(struct fw_unit *unit, int tcode,
u64 offset, void *buffer, size_t length);
const char *rcode_string(unsigned int rcode);
/* returns true if retrying the transaction would not make sense */
static inline bool rcode_is_permanent_error(int rcode)