Since snprintf() has the documented, but still rather strange trait of returning the length of the data that *would have been* written to the array if space were available, rather than the arguably more useful length of data *actually* written, it is usually considered wise to use something else instead in order to avoid confusion. In the case of sysfs call-backs, new wrappers exist that do just that. Link: https://lwn.net/Articles/69419/ Link: https://github.com/KSPP/linux/issues/105 Cc: Richard Hirst <rhirst@xxxxxxxxxxxxx> Signed-off-by: Lee Jones <lee@xxxxxxxxxx> --- drivers/scsi/53c700.c | 104 +++++++++++++++++++++--------------------- 1 file changed, 52 insertions(+), 52 deletions(-) diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c index 857be0f3ae5b9..1aa933485719a 100644 --- a/drivers/scsi/53c700.c +++ b/drivers/scsi/53c700.c @@ -4,7 +4,7 @@ * * Copyright (C) 2001 by James.Bottomley@xxxxxxxxxxxxxxxxxxxxx **----------------------------------------------------------------------------- -** +** ** **----------------------------------------------------------------------------- */ @@ -18,7 +18,7 @@ * * The 700 is the lowliest of the line, it can only do async SCSI. * The 700-66 can at least do synchronous SCSI up to 10MHz. - * + * * The 700 chip has no host bus interface logic of its own. However, * it is usually mapped to a location with well defined register * offsets. Therefore, if you can determine the base address and the @@ -61,7 +61,7 @@ * consistent memory allocation. * * Version 2.5 - * + * * More Compatibility changes for 710 (now actually works). Enhanced * support for odd clock speeds which constrain SDTR negotiations. * correct cacheline separation for scsi messages and status for @@ -70,7 +70,7 @@ * * Version 2.4 * - * Added support for the 53c710 chip (in 53c700 emulation mode only---no + * Added support for the 53c710 chip (in 53c700 emulation mode only---no * special 53c710 instructions or registers are used). * * Version 2.3 @@ -190,7 +190,7 @@ static char *NCR_700_condition[] = { "DISCONNECT_MSG RECEIVED", "MSG_OUT", "DATA_IN", - + }; static char *NCR_700_fatal_messages[] = { @@ -260,7 +260,7 @@ NCR_700_offset_period_to_sxfer(struct NCR_700_Host_Parameters *hostdata, static inline __u8 NCR_700_get_SXFER(struct scsi_device *SDp) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0]; return NCR_700_offset_period_to_sxfer(hostdata, @@ -416,7 +416,7 @@ NCR_700_detect(struct scsi_host_template *tpnt, int NCR_700_release(struct Scsi_Host *host) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)host->hostdata[0]; if (hostdata->noncoherent) @@ -449,7 +449,7 @@ NCR_700_identify(int can_disconnect, __u8 lun) * Inputs : host - SCSI host */ static inline int NCR_700_data_residual (struct Scsi_Host *host) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)host->hostdata[0]; int count, synchronous = 0; unsigned int ddir; @@ -461,16 +461,16 @@ NCR_700_data_residual (struct Scsi_Host *host) { count = ((NCR_700_readb(host, DFIFO_REG) & 0x3f) - (NCR_700_readl(host, DBC_REG) & 0x3f)) & 0x3f; } - + if(hostdata->fast) synchronous = NCR_700_readb(host, SXFER_REG) & 0x0f; - + /* get the data direction */ ddir = NCR_700_readb(host, CTEST0_REG) & 0x01; if (ddir) { /* Receive */ - if (synchronous) + if (synchronous) count += (NCR_700_readb(host, SSTAT2_REG) & 0xf0) >> 4; else if (NCR_700_readb(host, SSTAT1_REG) & SIDL_REG_FULL) @@ -500,7 +500,7 @@ sbcl_to_string(__u8 sbcl) ret[0]='\0'; for(i=0; i<8; i++) { - if((1<<i) & sbcl) + if((1<<i) & sbcl) strcat(ret, NCR_700_SBCL_bits[i]); } strcat(ret, NCR_700_SBCL_to_phase[sbcl & 0x07]); @@ -533,7 +533,7 @@ find_empty_slot(struct NCR_700_Host_Parameters *hostdata) if(slot->state != NCR_700_SLOT_FREE) /* should panic! */ printk(KERN_ERR "BUSY SLOT ON FREE LIST!!!\n"); - + hostdata->free_list = slot->ITL_forw; slot->ITL_forw = NULL; @@ -546,11 +546,11 @@ find_empty_slot(struct NCR_700_Host_Parameters *hostdata) slot->state = NCR_700_SLOT_BUSY; slot->flags = 0; hostdata->command_slot_count++; - + return slot; } -STATIC void +STATIC void free_slot(struct NCR_700_command_slot *slot, struct NCR_700_Host_Parameters *hostdata) { @@ -560,7 +560,7 @@ free_slot(struct NCR_700_command_slot *slot, if(slot->state == NCR_700_SLOT_FREE) { printk(KERN_ERR "53c700: SLOT %p is FREE!!!\n", slot); } - + slot->resume_offset = 0; slot->cmnd = NULL; slot->state = NCR_700_SLOT_FREE; @@ -654,7 +654,7 @@ NCR_700_internal_bus_reset(struct Scsi_Host *host) STATIC void NCR_700_chip_setup(struct Scsi_Host *host) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)host->hostdata[0]; __u8 min_period; __u8 min_xferp = (hostdata->chip710 ? NCR_710_MIN_XFERP : NCR_700_MIN_XFERP); @@ -694,11 +694,11 @@ NCR_700_chip_setup(struct Scsi_Host *host) } else { NCR_700_writeb(BURST_LENGTH_8 | hostdata->dmode_extra, host, DMODE_700_REG); - NCR_700_writeb(hostdata->differential ? + NCR_700_writeb(hostdata->differential ? DIFF : 0, host, CTEST7_REG); if(hostdata->fast) { /* this is for 700-66, does nothing on 700 */ - NCR_700_writeb(LAST_DIS_ENBL | ENABLE_ACTIVE_NEGATION + NCR_700_writeb(LAST_DIS_ENBL | ENABLE_ACTIVE_NEGATION | GENERATE_RECEIVE_PARITY, host, CTEST8_REG); } else { @@ -731,7 +731,7 @@ NCR_700_chip_setup(struct Scsi_Host *host) NCR_700_writeb(ASYNC_DIV_3_0 | hostdata->dcntl_extra, host, DCNTL_REG); hostdata->sync_clock = hostdata->clock*2; hostdata->sync_clock /= 3; - + } else if(hostdata->clock > 37 && hostdata->clock <= 50) { /* sync divider 1, async divider 2 */ DEBUG(("53c700: sync 1 async 2\n")); @@ -764,7 +764,7 @@ NCR_700_chip_setup(struct Scsi_Host *host) STATIC void NCR_700_chip_reset(struct Scsi_Host *host) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)host->hostdata[0]; if(hostdata->chip710) { NCR_700_writeb(SOFTWARE_RESET_710, host, ISTAT_REG); @@ -774,7 +774,7 @@ NCR_700_chip_reset(struct Scsi_Host *host) } else { NCR_700_writeb(SOFTWARE_RESET, host, DCNTL_REG); udelay(100); - + NCR_700_writeb(0, host, DCNTL_REG); } @@ -790,7 +790,7 @@ NCR_700_chip_reset(struct Scsi_Host *host) * ACK) so that the routine returns correctly to resume its activity * */ STATIC __u32 -process_extended_message(struct Scsi_Host *host, +process_extended_message(struct Scsi_Host *host, struct NCR_700_Host_Parameters *hostdata, struct scsi_cmnd *SCp, __u32 dsp, __u32 dsps) { @@ -816,15 +816,15 @@ process_extended_message(struct Scsi_Host *host, spi_offset(starget) = offset; spi_period(starget) = period; - + if(NCR_700_is_flag_set(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION)) { spi_display_xfer_agreement(starget); NCR_700_clear_flag(SCp->device, NCR_700_DEV_PRINT_SYNC_NEGOTIATION); } - + NCR_700_set_flag(SCp->device, NCR_700_DEV_NEGOTIATED_SYNC); NCR_700_clear_flag(SCp->device, NCR_700_DEV_BEGIN_SYNC_NEGOTIATION); - + NCR_700_writeb(NCR_700_get_SXFER(SCp->device), host, SXFER_REG); @@ -841,7 +841,7 @@ process_extended_message(struct Scsi_Host *host, resume_offset = hostdata->pScript + Ent_SendMessageWithATN; } break; - + case A_WDTR_MSG: printk(KERN_INFO "scsi%d: (%d:%d), Unsolicited WDTR after CMD, Rejecting\n", host->host_no, pun, lun); @@ -1121,7 +1121,7 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, SCp = scsi_host_find_tag(SDp->host, hostdata->msgin[2]); if(unlikely(SCp == NULL)) { - printk(KERN_ERR "scsi%d: (%d:%d) no saved request for tag %d\n", + printk(KERN_ERR "scsi%d: (%d:%d) no saved request for tag %d\n", host->host_no, reselection_id, lun, hostdata->msgin[2]); BUG(); } @@ -1180,7 +1180,7 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, slot->cmnd->cmd_len); - + } } else if(dsps == A_RESELECTED_DURING_SELECTION) { @@ -1193,10 +1193,10 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, __u8 reselection_id = NCR_700_readb(host, SFBR_REG); struct NCR_700_command_slot *slot; - + /* Take out our own ID */ reselection_id &= ~(1<<host->this_id); - + /* I've never seen this happen, so keep this as a printk rather * than a debug */ printk(KERN_INFO "scsi%d: (%d:%d) RESELECTION DURING SELECTION, dsp=%08x[%04x] state=%d, count=%d\n", @@ -1222,7 +1222,7 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, slot->state = NCR_700_SLOT_QUEUED; } hostdata->cmd = NULL; - + if(reselection_id == 0) { if(hostdata->reselection_id == 0xff) { printk(KERN_ERR "scsi%d: Invalid reselection during selection!!\n", host->host_no); @@ -1233,7 +1233,7 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, reselection_id = hostdata->reselection_id; } } else { - + /* convert to real ID */ reselection_id = bitmap_to_number(reselection_id); } @@ -1251,7 +1251,7 @@ process_script_interrupt(__u32 dsps, __u32 dsp, struct scsi_cmnd *SCp, * a return here will re-run the queued command slot * that may have been interrupted by the initial selection */ DEBUG((" SELECTION COMPLETED\n")); - } else if((dsps & 0xfffff0f0) == A_MSG_IN) { + } else if((dsps & 0xfffff0f0) == A_MSG_IN) { resume_offset = process_message(host, hostdata, SCp, dsp, dsps); } else if((dsps & 0xfffff000) == 0) { @@ -1304,7 +1304,7 @@ process_selection(struct Scsi_Host *host, __u32 dsp) /* Take out our own ID */ id &= ~(1<<host->this_id); - if(id != 0) + if(id != 0) break; udelay(5); } @@ -1322,7 +1322,7 @@ process_selection(struct Scsi_Host *host, __u32 dsp) struct NCR_700_command_slot *slot = (struct NCR_700_command_slot *)SCp->host_scribble; DEBUG((" ID %d WARNING: RESELECTION OF BUSY HOST, saving cmd %p, slot %p, addr %x [%04x], resume %x!\n", id, hostdata->cmd, slot, dsp, dsp - hostdata->pScript, resume_offset)); - + switch(dsp - hostdata->pScript) { case Ent_Disconnect1: case Ent_Disconnect2: @@ -1344,7 +1344,7 @@ process_selection(struct Scsi_Host *host, __u32 dsp) case Ent_Finish2: process_script_interrupt(A_GOOD_STATUS_AFTER_STATUS, dsp, SCp, host, hostdata); break; - + default: slot->state = NCR_700_SLOT_QUEUED; break; @@ -1547,7 +1547,7 @@ NCR_700_intr(int irq, void *dev_id) /* clear all the negotiated parameters */ __shost_for_each_device(SDp, host) NCR_700_clear_flag(SDp, ~0); - + /* clear all the slots and their pending commands */ for(i = 0; i < NCR_700_COMMAND_SLOTS_PER_HOST; i++) { struct scsi_cmnd *SCp; @@ -1556,7 +1556,7 @@ NCR_700_intr(int irq, void *dev_id) if(slot->state == NCR_700_SLOT_FREE) continue; - + SCp = slot->cmnd; printk(KERN_ERR " failing command because of reset, slot %p, cmnd %p\n", slot, SCp); @@ -1620,7 +1620,7 @@ NCR_700_intr(int irq, void *dev_id) data_transfer += residual; if(data_transfer != 0) { - int count; + int count; __u32 pAddr; SGcount--; @@ -1680,7 +1680,7 @@ NCR_700_intr(int irq, void *dev_id) NCR_700_scsi_done(hostdata, SCp, DID_ERROR<<16); } - + /* NOTE: selection interrupt processing MUST occur * after script interrupt processing to correctly cope * with the case where we process a disconnect and @@ -1718,7 +1718,7 @@ NCR_700_intr(int irq, void *dev_id) DEBUG(("Attempting to resume at %x\n", resume_offset)); NCR_700_clear_fifo(host); NCR_700_writel(resume_offset, host, DSP_REG); - } + } /* There is probably a technical no-no about this: If we're a * shared interrupt and we got this interrupt because the * other device needs servicing not us, we're still going to @@ -1732,7 +1732,7 @@ NCR_700_intr(int irq, void *dev_id) * position we left off */ int j = (i + hostdata->saved_slot_position) % NCR_700_COMMAND_SLOTS_PER_HOST; - + if(hostdata->slots[j].state != NCR_700_SLOT_QUEUED) continue; if(NCR_700_start_command(hostdata->slots[j].cmnd)) { @@ -1752,7 +1752,7 @@ NCR_700_intr(int irq, void *dev_id) static int NCR_700_queuecommand_lck(struct scsi_cmnd *SCp) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0]; __u32 move_ins; struct NCR_700_command_slot *slot; @@ -1852,7 +1852,7 @@ static int NCR_700_queuecommand_lck(struct scsi_cmnd *SCp) default: printk(KERN_ERR "53c700: Unknown command for data direction "); scsi_print_command(SCp); - + move_ins = 0; break; case DMA_NONE: @@ -1937,7 +1937,7 @@ STATIC int NCR_700_host_reset(struct scsi_cmnd * SCp) { DECLARE_COMPLETION_ONSTACK(complete); - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SCp->device->host->hostdata[0]; scmd_printk(KERN_INFO, SCp, @@ -1975,9 +1975,9 @@ STATIC void NCR_700_set_period(struct scsi_target *STp, int period) { struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent); - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SHp->hostdata[0]; - + if(!hostdata->fast) return; @@ -1994,11 +1994,11 @@ STATIC void NCR_700_set_offset(struct scsi_target *STp, int offset) { struct Scsi_Host *SHp = dev_to_shost(STp->dev.parent); - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SHp->hostdata[0]; int max_offset = hostdata->chip710 ? NCR_710_MAX_OFFSET : NCR_700_MAX_OFFSET; - + if(!hostdata->fast) return; @@ -2031,7 +2031,7 @@ NCR_700_slave_alloc(struct scsi_device *SDp) STATIC int NCR_700_slave_configure(struct scsi_device *SDp) { - struct NCR_700_Host_Parameters *hostdata = + struct NCR_700_Host_Parameters *hostdata = (struct NCR_700_Host_Parameters *)SDp->host->hostdata[0]; /* to do here: allocate memory; build a queue_full list */ @@ -2071,7 +2071,7 @@ NCR_700_show_active_tags(struct device *dev, struct device_attribute *attr, char { struct scsi_device *SDp = to_scsi_device(dev); - return snprintf(buf, 20, "%d\n", NCR_700_get_depth(SDp)); + return sysfs_emit(buf, "%d\n", NCR_700_get_depth(SDp)); } static struct device_attribute NCR_700_active_tags_attr = { -- 2.43.0.275.g3460e3d667-goog
