Commit 61f06db0 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi 

Pull SCSI fixes from James Bottomley:
 "This is three logical fixes (as 5 patches).

  The 3ware class of drivers were causing an oops with multiqueue by
  tearing down the command mappings after completing the command (where
  the variables in the command used to tear down the mapping were
  no-longer valid).  There's also a fix for the qnap iscsi target which
  was choking on us sending it commands that were too long and a fix for
  the reworked aha1542 allocating GFP_KERNEL under a lock"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  3w-9xxx: fix command completion race
  3w-xxxx: fix command completion race
  3w-sas: fix command completion race
  aha1542: Allocate memory before taking a lock
  SCSI: add 1024 max sectors black list flag
parents 33332224 118c855b

drivers/scsi/3w-9xxx.c

+13 −44
Original line number Diff line number Diff line
@@ -149,7 +149,6 @@ static int twa_reset_sequence(TW_Device_Extension *tw_dev, int soft_reset); 
static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry *sglistarg);

static void twa_scsiop_execute_scsi_complete(TW_Device_Extension *tw_dev, int request_id);

static char *twa_string_lookup(twa_message_type *table, unsigned int aen_code);

static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id);



/* Functions */
@@ -1340,11 +1339,11 @@ static irqreturn_t twa_interrupt(int irq, void *dev_instance) 
				}



				/* Now complete the io */

				scsi_dma_unmap(cmd);

				cmd->scsi_done(cmd);

				tw_dev->state[request_id] = TW_S_COMPLETED;

				twa_free_request_id(tw_dev, request_id);

				tw_dev->posted_request_count--;

				tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);

				twa_unmap_scsi_data(tw_dev, request_id);

			}



			/* Check for valid status after each drain */
@@ -1402,26 +1401,6 @@ static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_comm 
	}

} /* End twa_load_sgl() */



/* This function will perform a pci-dma mapping for a scatter gather list */

static int twa_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)

{

	int use_sg;

	struct scsi_cmnd *cmd = tw_dev->srb[request_id];



	use_sg = scsi_dma_map(cmd);

	if (!use_sg)

		return 0;

	else if (use_sg < 0) {

		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1c, "Failed to map scatter gather list");

		return 0;

	}



	cmd->SCp.phase = TW_PHASE_SGLIST;

	cmd->SCp.have_data_in = use_sg;



	return use_sg;

} /* End twa_map_scsi_sg_data() */



/* This function will poll for a response interrupt of a request */

static int twa_poll_response(TW_Device_Extension *tw_dev, int request_id, int seconds)

{
@@ -1600,9 +1579,11 @@ static int twa_reset_device_extension(TW_Device_Extension *tw_dev) 
		    (tw_dev->state[i] != TW_S_INITIAL) &&

		    (tw_dev->state[i] != TW_S_COMPLETED)) {

			if (tw_dev->srb[i]) {

				tw_dev->srb[i]->result = (DID_RESET << 16);

				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);

				twa_unmap_scsi_data(tw_dev, i);

				struct scsi_cmnd *cmd = tw_dev->srb[i];



				cmd->result = (DID_RESET << 16);

				scsi_dma_unmap(cmd);

				cmd->scsi_done(cmd);

			}

		}

	}
@@ -1781,21 +1762,18 @@ static int twa_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_ 
	/* Save the scsi command for use by the ISR */

	tw_dev->srb[request_id] = SCpnt;



	/* Initialize phase to zero */

	SCpnt->SCp.phase = TW_PHASE_INITIAL;



	retval = twa_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);

	switch (retval) {

	case SCSI_MLQUEUE_HOST_BUSY:

		scsi_dma_unmap(SCpnt);

		twa_free_request_id(tw_dev, request_id);

		twa_unmap_scsi_data(tw_dev, request_id);

		break;

	case 1:

		tw_dev->state[request_id] = TW_S_COMPLETED;

		twa_free_request_id(tw_dev, request_id);

		twa_unmap_scsi_data(tw_dev, request_id);

		SCpnt->result = (DID_ERROR << 16);

		scsi_dma_unmap(SCpnt);

		done(SCpnt);

		tw_dev->state[request_id] = TW_S_COMPLETED;

		twa_free_request_id(tw_dev, request_id);

		retval = 0;

	}

out:
@@ -1863,8 +1841,8 @@ static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, 
				command_packet->sg_list[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);

				command_packet->sg_list[0].length = cpu_to_le32(TW_MIN_SGL_LENGTH);

			} else {

				sg_count = twa_map_scsi_sg_data(tw_dev, request_id);

				if (sg_count == 0)

				sg_count = scsi_dma_map(srb);

				if (sg_count < 0)

					goto out;



				scsi_for_each_sg(srb, sg, sg_count, i) {
@@ -1979,15 +1957,6 @@ static char *twa_string_lookup(twa_message_type *table, unsigned int code) 
	return(table[index].text);

} /* End twa_string_lookup() */



/* This function will perform a pci-dma unmap */

static void twa_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)

{

	struct scsi_cmnd *cmd = tw_dev->srb[request_id];



	if (cmd->SCp.phase == TW_PHASE_SGLIST)

		scsi_dma_unmap(cmd);

} /* End twa_unmap_scsi_data() */



/* This function gets called when a disk is coming on-line */

static int twa_slave_configure(struct scsi_device *sdev)

{

drivers/scsi/3w-9xxx.h

+0 −5
Original line number Diff line number Diff line
@@ -324,11 +324,6 @@ static twa_message_type twa_error_table[] = { 
#define TW_CURRENT_DRIVER_BUILD 0

#define TW_CURRENT_DRIVER_BRANCH 0



/* Phase defines */

#define TW_PHASE_INITIAL 0

#define TW_PHASE_SINGLE  1

#define TW_PHASE_SGLIST  2



/* Misc defines */

#define TW_9550SX_DRAIN_COMPLETED	      0xFFFF

#define TW_SECTOR_SIZE                        512

drivers/scsi/3w-sas.c

+10 −40
Original line number Diff line number Diff line
@@ -290,26 +290,6 @@ static int twl_post_command_packet(TW_Device_Extension *tw_dev, int request_id) 
	return 0;

} /* End twl_post_command_packet() */



/* This function will perform a pci-dma mapping for a scatter gather list */

static int twl_map_scsi_sg_data(TW_Device_Extension *tw_dev, int request_id)

{

	int use_sg;

	struct scsi_cmnd *cmd = tw_dev->srb[request_id];



	use_sg = scsi_dma_map(cmd);

	if (!use_sg)

		return 0;

	else if (use_sg < 0) {

		TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Failed to map scatter gather list");

		return 0;

	}



	cmd->SCp.phase = TW_PHASE_SGLIST;

	cmd->SCp.have_data_in = use_sg;



	return use_sg;

} /* End twl_map_scsi_sg_data() */



/* This function hands scsi cdb's to the firmware */

static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, char *cdb, int use_sg, TW_SG_Entry_ISO *sglistarg)

{
@@ -357,8 +337,8 @@ static int twl_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id, 
	if (!sglistarg) {

		/* Map sglist from scsi layer to cmd packet */

		if (scsi_sg_count(srb)) {

			sg_count = twl_map_scsi_sg_data(tw_dev, request_id);

			if (sg_count == 0)

			sg_count = scsi_dma_map(srb);

			if (sg_count <= 0)

				goto out;



			scsi_for_each_sg(srb, sg, sg_count, i) {
@@ -1102,15 +1082,6 @@ out: 
	return retval;

} /* End twl_initialize_device_extension() */



/* This function will perform a pci-dma unmap */

static void twl_unmap_scsi_data(TW_Device_Extension *tw_dev, int request_id)

{

	struct scsi_cmnd *cmd = tw_dev->srb[request_id];



	if (cmd->SCp.phase == TW_PHASE_SGLIST)

		scsi_dma_unmap(cmd);

} /* End twl_unmap_scsi_data() */



/* This function will handle attention interrupts */

static int twl_handle_attention_interrupt(TW_Device_Extension *tw_dev)

{
@@ -1251,11 +1222,11 @@ static irqreturn_t twl_interrupt(int irq, void *dev_instance) 
			}



			/* Now complete the io */

			scsi_dma_unmap(cmd);

			cmd->scsi_done(cmd);

			tw_dev->state[request_id] = TW_S_COMPLETED;

			twl_free_request_id(tw_dev, request_id);

			tw_dev->posted_request_count--;

			tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);

			twl_unmap_scsi_data(tw_dev, request_id);

		}



		/* Check for another response interrupt */
@@ -1400,10 +1371,12 @@ static int twl_reset_device_extension(TW_Device_Extension *tw_dev, int ioctl_res 
		if ((tw_dev->state[i] != TW_S_FINISHED) &&

		    (tw_dev->state[i] != TW_S_INITIAL) &&

		    (tw_dev->state[i] != TW_S_COMPLETED)) {

			if (tw_dev->srb[i]) {

				tw_dev->srb[i]->result = (DID_RESET << 16);

				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);

				twl_unmap_scsi_data(tw_dev, i);

			struct scsi_cmnd *cmd = tw_dev->srb[i];



			if (cmd) {

				cmd->result = (DID_RESET << 16);

				scsi_dma_unmap(cmd);

				cmd->scsi_done(cmd);

			}

		}

	}
@@ -1507,9 +1480,6 @@ static int twl_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_ 
	/* Save the scsi command for use by the ISR */

	tw_dev->srb[request_id] = SCpnt;



	/* Initialize phase to zero */

	SCpnt->SCp.phase = TW_PHASE_INITIAL;



	retval = twl_scsiop_execute_scsi(tw_dev, request_id, NULL, 0, NULL);

	if (retval) {

		tw_dev->state[request_id] = TW_S_COMPLETED;

drivers/scsi/3w-sas.h

+0 −4
Original line number Diff line number Diff line
@@ -103,10 +103,6 @@ static char *twl_aen_severity_table[] = 
#define TW_CURRENT_DRIVER_BUILD 0

#define TW_CURRENT_DRIVER_BRANCH 0



/* Phase defines */

#define TW_PHASE_INITIAL 0

#define TW_PHASE_SGLIST  2



/* Misc defines */

#define TW_SECTOR_SIZE                        512

#define TW_MAX_UNITS			      32

drivers/scsi/3w-xxxx.c

+6 −36
Original line number Diff line number Diff line
@@ -1271,32 +1271,6 @@ static int tw_initialize_device_extension(TW_Device_Extension *tw_dev) 
	return 0;

} /* End tw_initialize_device_extension() */



static int tw_map_scsi_sg_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)

{

	int use_sg;



	dprintk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data()\n");



	use_sg = scsi_dma_map(cmd);

	if (use_sg < 0) {

		printk(KERN_WARNING "3w-xxxx: tw_map_scsi_sg_data(): pci_map_sg() failed.\n");

		return 0;

	}



	cmd->SCp.phase = TW_PHASE_SGLIST;

	cmd->SCp.have_data_in = use_sg;



	return use_sg;

} /* End tw_map_scsi_sg_data() */



static void tw_unmap_scsi_data(struct pci_dev *pdev, struct scsi_cmnd *cmd)

{

	dprintk(KERN_WARNING "3w-xxxx: tw_unmap_scsi_data()\n");



	if (cmd->SCp.phase == TW_PHASE_SGLIST)

		scsi_dma_unmap(cmd);

} /* End tw_unmap_scsi_data() */



/* This function will reset a device extension */

static int tw_reset_device_extension(TW_Device_Extension *tw_dev)

{
@@ -1319,8 +1293,8 @@ static int tw_reset_device_extension(TW_Device_Extension *tw_dev) 
			srb = tw_dev->srb[i];

			if (srb != NULL) {

				srb->result = (DID_RESET << 16);

				tw_dev->srb[i]->scsi_done(tw_dev->srb[i]);

				tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[i]);

				scsi_dma_unmap(srb);

				srb->scsi_done(srb);

			}

		}

	}
@@ -1767,8 +1741,8 @@ static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id) 
	command_packet->byte8.io.lba = lba;

	command_packet->byte6.block_count = num_sectors;



	use_sg = tw_map_scsi_sg_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);

	if (!use_sg)

	use_sg = scsi_dma_map(srb);

	if (use_sg <= 0)

		return 1;



	scsi_for_each_sg(tw_dev->srb[request_id], sg, use_sg, i) {
@@ -1955,9 +1929,6 @@ static int tw_scsi_queue_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_c 
	/* Save the scsi command for use by the ISR */

	tw_dev->srb[request_id] = SCpnt;



	/* Initialize phase to zero */

	SCpnt->SCp.phase = TW_PHASE_INITIAL;



	switch (*command) {

		case READ_10:

		case READ_6:
@@ -2185,12 +2156,11 @@ static irqreturn_t tw_interrupt(int irq, void *dev_instance) 


				/* Now complete the io */

				if ((error != TW_ISR_DONT_COMPLETE)) {

					scsi_dma_unmap(tw_dev->srb[request_id]);

					tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);

					tw_dev->state[request_id] = TW_S_COMPLETED;

					tw_state_request_finish(tw_dev, request_id);

					tw_dev->posted_request_count--;

					tw_dev->srb[request_id]->scsi_done(tw_dev->srb[request_id]);

					

					tw_unmap_scsi_data(tw_dev->tw_pci_dev, tw_dev->srb[request_id]);

				}

			}

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