Hello Ondrej Zary,
The patch 1b0224b0ec60: "aha1542: rework locking" from Feb 6, 2015,
leads to the following static checker warning:
drivers/scsi/aha1542.c:448 aha1542_queuecommand()
error: scheduling with locks held: 'spin_lock:host_lock'
drivers/scsi/aha1542.c
400 /* Use the outgoing mailboxes in a round-robin fashion, because
this
401 is how the host adapter will scan for them */
402
403 spin_lock_irqsave(sh->host_lock, flags);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Holding lock.
404 mbo = aha1542->aha1542_last_mbo_used + 1;
405 if (mbo >= AHA1542_MAILBOXES)
406 mbo = 0;
407
[ snip ]
442 if (bufflen) {
443 struct scatterlist *sg;
444 struct chain *cptr;
445 int i, sg_count = scsi_sg_count(cmd);
446
447 ccb[mbo].op = 2; /* SCSI Initiator Command
w/scatter-gather */
448 cmd->host_scribble = kmalloc(sizeof(*cptr)*sg_count,
449 GFP_KERNEL |
GFP_DMA);
^^^^^^^^^^
Sleeping allocation.
450 cptr = (struct chain *) cmd->host_scribble;
451 if (cptr == NULL) {
452 /* free the claimed mailbox slot */
453 aha1542->int_cmds[mbo] = NULL;
454 spin_unlock_irqrestore(sh->host_lock, flags);
455 return SCSI_MLQUEUE_HOST_BUSY;
456 }
457 scsi_for_each_sg(cmd, sg, sg_count, i) {
458 any2scsi(cptr[i].dataptr,
isa_page_to_bus(sg_page(sg))
459 +
sg->offset);
460 any2scsi(cptr[i].datalen, sg->length);
461 };
regards,
dan carpenter
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