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Date: Wed, 26 Sep 2007 00:35:46 -0400
From: Jeff Garzik <jeff@...zik.org>
To: achim_leubner@...ptec.com, linux-scsi@...r.kernel.org,
LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 6/8] gdth: Move probe-time error handling code to end of
each function
Use standard laddered-goto error handling approach in three probe-time
functions.
Signed-off-by: Jeff Garzik <jeff@...zik.org>
---
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index d7ef159..89ac155 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -3964,13 +3964,11 @@ static int __init gdth_start_isa(struct scsi_host_template *shtp,
shp = scsi_register(shtp, sizeof(gdth_ext_str));
if (shp == NULL)
- return 1; /* continue looping */
+ goto err_out;
ha = HADATA(shp);
- if (!gdth_init_isa(isa_bios, ha)) {
- scsi_unregister(shp);
- return 1; /* continue looping */
- }
+ if (!gdth_init_isa(isa_bios, ha))
+ goto err_out_shp;
#ifdef __ia64__
return 0; /* end loop: success */
@@ -3981,14 +3979,11 @@ static int __init gdth_start_isa(struct scsi_host_template *shtp,
if (request_irq(ha->irq, gdth_interrupt, IRQF_DISABLED, "gdth", ha)) {
printk("GDT-ISA: Unable to allocate IRQ\n");
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_shp;
}
if (request_dma(ha->drq, "gdth")) {
printk("GDT-ISA: Unable to allocate DMA channel\n");
- free_irq(ha->irq, ha);
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_irq;
}
set_dma_mode(ha->drq, DMA_MODE_CASCADE);
@@ -4030,25 +4025,7 @@ static int __init gdth_start_isa(struct scsi_host_template *shtp,
if (ha->pscratch == NULL || ha->pmsg == NULL ||
!gdth_search_drives(hanum)) {
printk("GDT-ISA: Error during device scan\n");
- gdth_pop_shp();
-
-#ifdef INT_COAL
- if (ha->coal_stat)
- pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
- MAXOFFSETS, ha->coal_stat,
- ha->coal_stat_phys);
-#endif
-
- if (ha->pscratch)
- pci_free_consistent(ha->pdev, GDTH_SCRATCH,
- ha->pscratch, ha->scratch_phys);
- if (ha->pmsg)
- pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
- ha->pmsg, ha->msg_phys);
-
- free_irq(ha->irq,ha);
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_ha;
}
if (hdr_channel < 0 || hdr_channel > ha->bus_cnt)
@@ -4079,9 +4056,32 @@ static int __init gdth_start_isa(struct scsi_host_template *shtp,
spin_lock_init(&ha->smp_lock);
gdth_enable_int(hanum);
-#endif /* !__ia64__ */
return 1; /* continue looping */
+
+err_out_ha:
+ gdth_pop_shp();
+
+#ifdef INT_COAL
+ if (ha->coal_stat)
+ pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
+ MAXOFFSETS, ha->coal_stat,
+ ha->coal_stat_phys);
+#endif
+
+ if (ha->pscratch)
+ pci_free_consistent(ha->pdev, GDTH_SCRATCH,
+ ha->pscratch, ha->scratch_phys);
+ if (ha->pmsg)
+ pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
+ ha->pmsg, ha->msg_phys);
+err_out_irq:
+ free_irq(ha->irq, ha);
+#endif /* !__ia64__ */
+err_out_shp:
+ scsi_unregister(shp);
+err_out:
+ return 1; /* continue looping */
}
static int __init gdth_start_eisa(struct scsi_host_template *shtp,
@@ -4094,13 +4094,11 @@ static int __init gdth_start_eisa(struct scsi_host_template *shtp,
shp = scsi_register(shtp,sizeof(gdth_ext_str));
if (shp == NULL)
- return 1; /* continue looping */
+ goto err_out;
ha = HADATA(shp);
- if (!gdth_init_eisa(eisa_slot,ha)) {
- scsi_unregister(shp);
- return 1; /* continue looping */
- }
+ if (!gdth_init_eisa(eisa_slot,ha))
+ goto err_out_shp;
/* controller found and initialized */
printk("Configuring GDT-EISA HA at Slot %d IRQ %u\n",
@@ -4108,8 +4106,7 @@ static int __init gdth_start_eisa(struct scsi_host_template *shtp,
if (request_irq(ha->irq,gdth_interrupt,IRQF_DISABLED,"gdth",ha)) {
printk("GDT-EISA: Unable to allocate IRQ\n");
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_shp;
}
shp->unchecked_isa_dma = 0;
@@ -4155,26 +4152,7 @@ static int __init gdth_start_eisa(struct scsi_host_template *shtp,
if (ha->pscratch == NULL || ha->pmsg == NULL ||
!gdth_search_drives(hanum)) {
printk("GDT-EISA: Error during device scan\n");
- gdth_pop_shp();
-
-#ifdef INT_COAL
- if (ha->coal_stat)
- pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
- MAXOFFSETS, ha->coal_stat,
- ha->coal_stat_phys);
-#endif
- if (ha->pscratch)
- pci_free_consistent(ha->pdev, GDTH_SCRATCH,
- ha->pscratch, ha->scratch_phys);
- if (ha->pmsg)
- pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
- ha->pmsg, ha->msg_phys);
- if (ha->ccb_phys)
- pci_unmap_single(ha->pdev,ha->ccb_phys,
- sizeof(gdth_cmd_str),PCI_DMA_BIDIRECTIONAL);
- free_irq(ha->irq,ha);
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_ha;
}
if (hdr_channel < 0 || hdr_channel > ha->bus_cnt)
@@ -4207,6 +4185,30 @@ static int __init gdth_start_eisa(struct scsi_host_template *shtp,
gdth_enable_int(hanum);
return 1; /* continue looping */
+
+err_out_ha:
+ gdth_pop_shp();
+
+#ifdef INT_COAL
+ if (ha->coal_stat)
+ pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
+ MAXOFFSETS, ha->coal_stat,
+ ha->coal_stat_phys);
+#endif
+ if (ha->pscratch)
+ pci_free_consistent(ha->pdev, GDTH_SCRATCH,
+ ha->pscratch, ha->scratch_phys);
+ if (ha->pmsg)
+ pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
+ ha->pmsg, ha->msg_phys);
+ if (ha->ccb_phys)
+ pci_unmap_single(ha->pdev,ha->ccb_phys,
+ sizeof(gdth_cmd_str),PCI_DMA_BIDIRECTIONAL);
+ free_irq(ha->irq, ha);
+err_out_shp:
+ scsi_unregister(shp);
+err_out:
+ return 1; /* continue looping */
}
static int __init gdth_start_pci(struct scsi_host_template *shtp,
@@ -4215,19 +4217,17 @@ static int __init gdth_start_pci(struct scsi_host_template *shtp,
struct Scsi_Host *shp;
dma_addr_t scratch_dma_handle = 0;
gdth_ha_str *ha;
- int i, hanum, err;
+ int i, hanum;
if (gdth_ctr_count >= MAXHA)
return 0; /* end loop: success */
shp = scsi_register(shtp,sizeof(gdth_ext_str));
if (shp == NULL)
- return 1; /* continue looping */
+ goto err_out;
ha = HADATA(shp);
- if (!gdth_init_pci(&pcistr[ctr],ha)) {
- scsi_unregister(shp);
- return 1; /* continue looping */
- }
+ if (!gdth_init_pci(&pcistr[ctr],ha))
+ goto err_out_shp;
/* controller found and initialized */
printk("Configuring GDT-PCI HA at %d/%d IRQ %u\n",
@@ -4237,8 +4237,7 @@ static int __init gdth_start_pci(struct scsi_host_template *shtp,
if (request_irq(ha->irq, gdth_interrupt,
IRQF_DISABLED | IRQF_SHARED, "gdth", ha)) {
printk("GDT-PCI: Unable to allocate IRQ\n");
- scsi_unregister(shp);
- return 1; /* continue looping */
+ goto err_out_shp;
}
shp->unchecked_isa_dma = 0;
@@ -4275,58 +4274,32 @@ static int __init gdth_start_pci(struct scsi_host_template *shtp,
ha->cmd_tab[i].cmnd = UNUSED_CMND;
ha->scan_mode = rescan ? 0x10 : 0;
- err = FALSE;
if (ha->pscratch == NULL || ha->pmsg == NULL ||
- !gdth_search_drives(hanum)) {
- err = TRUE;
- } else {
- if (hdr_channel < 0 || hdr_channel > ha->bus_cnt)
- hdr_channel = ha->bus_cnt;
- ha->virt_bus = hdr_channel;
-
- if (!(ha->cache_feat & ha->raw_feat & ha->screen_feat &
- GDT_64BIT) ||
- /* 64-bit DMA only supported from FW >= x.43 */
- (!ha->dma64_support)) {
- if (pci_set_dma_mask(pcistr[ctr].pdev, DMA_32BIT_MASK)){
- printk(KERN_WARNING "GDT-PCI %d: Unable to "
- "set 32-bit DMA\n", hanum);
- err = TRUE;
- }
- } else {
- shp->max_cmd_len = 16;
- if (!pci_set_dma_mask(pcistr[ctr].pdev,DMA_64BIT_MASK)){
- printk("GDT-PCI %d: 64-bit DMA enabled\n",
- hanum);
- } else if (pci_set_dma_mask(pcistr[ctr].pdev,
- DMA_32BIT_MASK)) {
- printk(KERN_WARNING "GDT-PCI %d: Unable to set "
- "64/32-bit DMA\n", hanum);
- err = TRUE;
- }
- }
- }
+ !gdth_search_drives(hanum))
+ goto err_out_ha;
- if (err) {
- printk("GDT-PCI %d: Error during device scan\n", hanum);
- gdth_pop_shp();
-
-#ifdef INT_COAL
- if (ha->coal_stat)
- pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
- MAXOFFSETS, ha->coal_stat,
- ha->coal_stat_phys);
-#endif
+ if (hdr_channel < 0 || hdr_channel > ha->bus_cnt)
+ hdr_channel = ha->bus_cnt;
+ ha->virt_bus = hdr_channel;
- if (ha->pscratch)
- pci_free_consistent(ha->pdev, GDTH_SCRATCH,
- ha->pscratch, ha->scratch_phys);
- if (ha->pmsg)
- pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
- ha->pmsg, ha->msg_phys);
- free_irq(ha->irq,ha);
- scsi_unregister(shp);
- return 1; /* continue looping */
+ if (!(ha->cache_feat & ha->raw_feat & ha->screen_feat & GDT_64BIT) ||
+ /* 64-bit DMA only supported from FW >= x.43 */
+ (!ha->dma64_support)) {
+ if (pci_set_dma_mask(pcistr[ctr].pdev, DMA_32BIT_MASK)){
+ printk(KERN_WARNING "GDT-PCI %d: Unable to "
+ "set 32-bit DMA\n", hanum);
+ goto err_out_ha;
+ }
+ } else {
+ shp->max_cmd_len = 16;
+ if (!pci_set_dma_mask(pcistr[ctr].pdev, DMA_64BIT_MASK)) {
+ printk("GDT-PCI %d: 64-bit DMA enabled\n",
+ hanum);
+ } else if (pci_set_dma_mask(pcistr[ctr].pdev, DMA_32BIT_MASK)) {
+ printk(KERN_WARNING "GDT-PCI %d: Unable to set "
+ "64/32-bit DMA\n", hanum);
+ goto err_out_ha;
+ }
}
shp->max_id = ha->tid_cnt;
@@ -4353,6 +4326,28 @@ static int __init gdth_start_pci(struct scsi_host_template *shtp,
gdth_enable_int(hanum);
return 1; /* continue looping */
+
+err_out_ha:
+ gdth_pop_shp();
+
+#ifdef INT_COAL
+ if (ha->coal_stat)
+ pci_free_consistent(ha->pdev, sizeof(gdth_coal_status) *
+ MAXOFFSETS, ha->coal_stat,
+ ha->coal_stat_phys);
+#endif
+
+ if (ha->pscratch)
+ pci_free_consistent(ha->pdev, GDTH_SCRATCH,
+ ha->pscratch, ha->scratch_phys);
+ if (ha->pmsg)
+ pci_free_consistent(ha->pdev, sizeof(gdth_msg_str),
+ ha->pmsg, ha->msg_phys);
+ free_irq(ha->irq, ha);
+err_out_shp:
+ scsi_unregister(shp);
+err_out:
+ return 1; /* continue looping */
}
static int __init gdth_detect(struct scsi_host_template *shtp)
-
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